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1

Facchini, Peter J., Jillian Hagel, and Katherine G. Zulak. "Hydroxycinnamic acid amide metabolism: physiology and biochemistry." Canadian Journal of Botany 80, no. 6 (June 1, 2002): 577–89. http://dx.doi.org/10.1139/b02-065.

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Hydroxycinnamic acid amides (HCAAs) are a widely distributed group of plant secondary metabolites purported to function in several growth and developmental processes including floral induction, flower formation, sexual differentiation, tuberization, cell division, and cytomorphogenesis. Although most of these putative physiological roles for HCAAs remain controversial, the biosynthesis of amides and their subsequent polymerization in the plant cell wall are generally accepted as integral components of plant defense responses to pathogen challenge and wounding. Tyramine-derived HCAAs are commonly associated with the cell wall of tissues near pathogen-infected or wound healing regions. Moreover, feruloyltyramine and feruloyloctapamine are covalent cell wall constituents of both natural and wound periderms of potato (Solanum tuberosum) tubers, and are putative components of the aromatic domain of suberin. The deposition of HCAAs is thought to create a barrier against pathogens by reducing cell wall digestibility. HCAAs are formed by the condensation of hydroxycinnamoyl-CoA thioesters with phenylethylamines such as tyramine, or polyamines such as putrescine. The ultimate step in tyramine-derived HCAA biosynthesis is catalyzed by hydro xycinnamoyl-CoA:tyramine N-(hydroxycinnamoyl)transferase (THT; E.C. 2.3.1.110). The enzyme has been isolated and purified from a variety of plants, and the corresponding cDNAs cloned from potato, tobacco (Nicotiana tabacum), and pepper (Capsicum annuum). THT exhibits homology with mammalian spermidine-spermine acetyl transferases and putative N-acetyltransferases from microorganisms. In this review, recent advances in our understanding of the physiology and biochemistry of HCAA biosynthesis in plants are discussed.Key words: hydroxycinnamic acid amides, hydroxycinnamoyl-CoA thioesters, metabolic engineering, phenylethylamines, plant cell wall, polyamines, secondary metabolism, tyramine.
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2

Varner, Joseph E., and Liang-Shiou Lin. "Plant cell wall architecture." Cell 56, no. 2 (January 1989): 231–39. http://dx.doi.org/10.1016/0092-8674(89)90896-9.

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3

Wojtaszek, P. "Organismal view of a plant and a plant cell." Acta Biochimica Polonica 48, no. 2 (June 30, 2001): 443–51. http://dx.doi.org/10.18388/abp.2001_3928.

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Cell walls are at the basis of a structural, four-dimensional framework of plant form and growth time. Recent rapid progress of cell wall research has led to the situation where the old, long-lasting juxtaposition: "living" protoplast--"dead" cell wall, had to be dropped. Various attempts of re-interpretation cast, however, some doubts over the very nature of plant cell and the status of the walls within such a cell. Following a comparison of exocellular matrices of plants and animals, their position in relation to cells and organisms is analysed. A multitude of perspectives of the biological organisation of living beings is presented with particular attention paid to the cellular and organismal theories. Basic tenets and resulting corollaries of both theories are compared, and evolutionary and developmental implications are considered. Based on these data, "The Plant Body"--an organismal concept of plants and plant cells is described.
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4

Bonetta, D. T., M. Facette, T. K. Raab, and C. R. Somerville. "Genetic dissection of plant cell-wall biosynthesis." Biochemical Society Transactions 30, no. 2 (April 1, 2002): 298–301. http://dx.doi.org/10.1042/bst0300298.

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The plant cell wall is a complex structure consisting of a variety of polymers including cellulose, xyloglucan, xylan and polygalacturonan. Biochemical and genetic analysis has made it possible to clone genes encoding cellulose synthases (CesA). A comparison of the predicted protein sequences in the Arabidopsis genome indicates that 30 divergent genes with similarity to CesAs exist. It is possible that these cellulose synthase-like (Csl) proteins do not contribute to cellulose synthesis, but rather to the synthesis of other wall polymers. A major challenge is, therefore, to assign biological function to these genes. In an effort to address this issue we have systematically identified T-DNA or transposon insertions in 17 Arabidopsis Csls. Phenotypic characterization of ‘knock-out’ mutants includes the determination of spectroscopic profile differences in mutant cell walls from wild-type plants by Fourier-transform IR microscopy. A more precise characterization includes cell wall fractionation followed by neutral sugar composition analysis by anionic exchange chromatography.
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5

Smith, C. J. "Biochemistry of plant cell walls." Endeavour 10, no. 1 (January 1986): 55. http://dx.doi.org/10.1016/0160-9327(86)90078-5.

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6

Gilbert, Harry J. "The Biochemistry and Structural Biology of Plant Cell Wall Deconstruction." Plant Physiology 153, no. 2 (April 20, 2010): 444–55. http://dx.doi.org/10.1104/pp.110.156646.

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7

Morris, V. J., A. P. Gunning, A. R. Kirby, A. Round, K. Waldron, and A. Ng. "Atomic force microscopy of plant cell walls, plant cell wall polysaccharides and gels." International Journal of Biological Macromolecules 21, no. 1-2 (August 1997): 61–66. http://dx.doi.org/10.1016/s0141-8130(97)00042-1.

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8

Gibeaut, David M., and Nicholas G. Carpita. "Biosynthesis of plant cell wall polysaccharides." FASEB Journal 8, no. 12 (September 1994): 904–15. http://dx.doi.org/10.1096/fasebj.8.12.8088456.

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9

Bruce, David M. "Mathematical modelling of the cellular mechanics of plants." Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 358, no. 1437 (July 30, 2003): 1437–44. http://dx.doi.org/10.1098/rstb.2003.1337.

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The complex mechanical behaviour of plant tissues reflects the complexity of their structure and material properties. Modelling has been widely used in studies of how cell walls, single cells and tissue respond to loading, both externally applied loading and loads on the cell wall resulting from changes in the pressure within fluid–filled cells. This paper reviews what approaches have been taken to modelling and simulation of cell wall, cell and tissue mechanics, and to what extent models have been successful in predicting mechanical behaviour. Advances in understanding of cell wall ultrastructure and the control of cell growth present opportunities for modelling to clarify how growth–related mechanical properties arise from wall polymeric structure and biochemistry.
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10

Fry, S. C. "BIOCHEMISTRY OF PLANT CELL WALLS (Book)." Plant, Cell and Environment 9, no. 1 (January 1986): 85. http://dx.doi.org/10.1111/1365-3040.ep11614355.

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11

Crompton, D. W. T. "Donald Henry Northcote. 27 December 1921—7 January 2004." Biographical Memoirs of Fellows of the Royal Society 67 (August 21, 2019): 357–70. http://dx.doi.org/10.1098/rsbm.2019.0020.

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Don Northcote became eminent in the field of plant biochemistry following his identification of the processes involved in the synthesis and deposition of polysaccharides that constitute the cell wall of plants. His researches spanned lower and higher plant species and he showed by the application of a variety of experimental techniques, including radioautography, electrophoresis, freeze etching and the novel use of electron microscopy, that much of the material of the cell wall is synthesized in cytoplasmic organelles before being transported to the developing wall in vesicles assembled from the membranes of the Golgi body. His findings inspired many colleagues to build on the foundation he laid for understanding the biochemistry of cell morphogenesis. Nearly his entire career was spent in fundamental research and teaching in the Department of Biochemistry, University of Cambridge, from 1948 until his retirement in 1992. In addition, he was a fellow of St John's College, Cambridge, from 1960 to 1976, and he served Sidney Sussex College, Cambridge, as master from 1976 to 1992.
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12

Plaza, Verónica, Evelyn Silva-Moreno, and Luis Castillo. "Breakpoint: Cell Wall and Glycoproteins and their Crucial Role in the Phytopathogenic Fungi Infection." Current Protein & Peptide Science 21, no. 3 (March 26, 2020): 227–44. http://dx.doi.org/10.2174/1389203720666190906165111.

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The cell wall that surrounds fungal cells is essential for their survival, provides protection against physical and chemical stresses, and plays relevant roles during infection. In general, the fungal cell wall is composed of an outer layer of glycoprotein and an inner skeletal layer of β-glucans or α- glucans and chitin. Chitin synthase genes have been shown to be important for septum formation, cell division and virulence. In the same way, chitin can act as a potent elicitor to activate defense response in several plant species; however, the fungi can convert chitin to chitosan during plant infection to evade plant defense mechanisms. Moreover, α-1,3-Glucan, a non-degradable polysaccharide in plants, represents a key feature in fungal cell walls formed in plants and plays a protective role for this fungus against plant lytic enzymes. A similar case is with β-1,3- and β-1,6-glucan which are essential for infection, structure rigidity and pathogenicity during fungal infection. Cell wall glycoproteins are also vital to fungi. They have been associated with conidial separation, the increase of chitin in conidial cell walls, germination, appressorium formation, as well as osmotic and cell wall stress and virulence; however, the specific roles of glycoproteins in filamentous fungi remain unknown. Fungi that can respond to environmental stimuli distinguish these signals and relay them through intracellular signaling pathways to change the cell wall composition. They play a crucial role in appressorium formation and penetration, and release cell wall degrading enzymes, which determine the outcome of the interaction with the host. In this review, we highlight the interaction of phypatophogen cell wall and signaling pathways with its host and their contribution to fungal pathogenesis.
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13

Gorshkova, T. A., P. V. Mikshina, O. P. Gurjanov, and S. B. Chemikosova. "Formation of plant cell wall supramolecular structure." Biochemistry (Moscow) 75, no. 2 (February 2010): 159–72. http://dx.doi.org/10.1134/s0006297910020069.

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14

Spence, Richard D., and Hsin-I. Wu. "Plant cell wall elasticity III:." Journal of Theoretical Biology 177, no. 1 (November 1995): 59–65. http://dx.doi.org/10.1006/jtbi.1995.0224.

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15

Fry, Stephen C., Lenka Franková, and Dimitra Chormova. "Setting the boundaries: Primary cell wall synthesis and expansion." Biochemist 33, no. 2 (April 1, 2011): 14–19. http://dx.doi.org/10.1042/bio03302014.

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Mature plant cells typically have two-layered walls: a first-formed thin outer primary wall layer enclosing a later-formed thick inner secondary wall. The surface area of the primary wall limits the size of the cell and thus the maximum amount of biomass that can potentially be accumulated in the secondary wall. By controlling the shape and size of the cell, the primary wall therefore imposes the limits on the amount of inedible biofuel a plant cell can make.
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16

Sainz-Polo, M. Angela, Beatriz González, Margarita Menéndez, F. I. Javier Pastor, and Julia Sanz-Aparicio. "Exploring Multimodularity in Plant Cell Wall Deconstruction." Journal of Biological Chemistry 290, no. 28 (May 22, 2015): 17116–30. http://dx.doi.org/10.1074/jbc.m115.659300.

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17

Schopfer, P. "Physiology and biochemistry of plant cell walls." Plant Science 123, no. 1-2 (March 1997): 211. http://dx.doi.org/10.1016/s0168-9452(96)04565-7.

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18

Loewus, F. A. "Physiology and biochemistry of plant cell walls." Plant Science 73, no. 1 (January 1991): 127. http://dx.doi.org/10.1016/0168-9452(91)90134-t.

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19

Serra, Léo, and Sarah Robinson. "Plant cell divisions: variations from the shortest symmetric path." Biochemical Society Transactions 48, no. 6 (December 18, 2020): 2743–52. http://dx.doi.org/10.1042/bst20200529.

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In plants, the spatial arrangement of cells within tissues and organs is a direct consequence of the positioning of the new cell walls during cell division. Since the nineteenth century, scientists have proposed rules to explain the orientation of plant cell divisions. Most of these rules predict the new wall will follow the shortest path passing through the cell centroid halving the cell into two equal volumes. However, in some developmental contexts, divisions deviate significantly from this rule. In these situations, mechanical stress, hormonal signalling, or cell polarity have been described to influence the division path. Here we discuss the mechanism and subcellular structure required to define the cell division placement then we provide an overview of the situations where division deviates from the shortest symmetric path.
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20

Faik, Ahmed, and Michael Held. "Review: Plant cell wall biochemical omics: The high-throughput biochemistry for polysaccharide biosynthesis." Plant Science 286 (September 2019): 49–56. http://dx.doi.org/10.1016/j.plantsci.2019.04.025.

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21

Wightman, Raymond, and Simon Turner. "Digesting the indigestible: Biosynthesis of the plant secondary wall." Biochemist 33, no. 2 (April 1, 2011): 24–28. http://dx.doi.org/10.1042/bio03302024.

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Biofuels have recently been the subject of intense debate with regard to‘food versus fuel’. Consequently, attention has focused upon so-called ‘second-generation’ biofuels that use alternatives to food-based feedstocks. In the best-developed forms of second-generation biofuels, sugars from starch digestion could be replaced with sugars released from the plant cell walls. This biomass could come from either agricultural residue, such as part of the maize culm, or from purpose grown biofuel crops, such as Miscanthus or Switchgrass (Panicum virgatum), that generate huge yields even when grown on marginal land with minimal agricultural inputs. For these and other potential bioenergy crops such as trees, the majority of the plant biomass is composed of woody secondary cell walls. If all cell wall sugars were readily accessible to fermenting micro-organisms, a 5 kg log could theoretically produce up to 2.5 litres of ethanol. The secondary cell walls are frequently the first line of defence against pests and pathogens, as well as providing structure and support for upward plant growth (Figure 1). Consequently, by their very nature, secondary cell walls are designed for strength and to resist degradation. The compact organization of the wall makes its digestion, a process known as saccharification, very difficult so biomass is currently too costly to be a viable feedstock. Knowledge of how the walls are constructed, however, would allow us to efficiently deconstruct them. This article gives an overview of secondary walls and potential modifications expected to be beneficial to improved biofuel production.
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22

Hoffmann, Natalie, Samuel King, A. Lacey Samuels, and Heather E. McFarlane. "Subcellular coordination of plant cell wall synthesis." Developmental Cell 56, no. 7 (April 2021): 933–48. http://dx.doi.org/10.1016/j.devcel.2021.03.004.

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23

Gibson, Lorna J. "The hierarchical structure and mechanics of plant materials." Journal of The Royal Society Interface 9, no. 76 (August 8, 2012): 2749–66. http://dx.doi.org/10.1098/rsif.2012.0341.

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The cell walls in plants are made up of just four basic building blocks: cellulose (the main structural fibre of the plant kingdom) hemicellulose, lignin and pectin. Although the microstructure of plant cell walls varies in different types of plants, broadly speaking, cellulose fibres reinforce a matrix of hemicellulose and either pectin or lignin. The cellular structure of plants varies too, from the largely honeycomb-like cells of wood to the closed-cell, liquid-filled foam-like parenchyma cells of apples and potatoes and to composites of these two cellular structures, as in arborescent palm stems. The arrangement of the four basic building blocks in plant cell walls and the variations in cellular structure give rise to a remarkably wide range of mechanical properties: Young's modulus varies from 0.3 MPa in parenchyma to 30 GPa in the densest palm, while the compressive strength varies from 0.3 MPa in parenchyma to over 300 MPa in dense palm. The moduli and compressive strength of plant materials span this entire range. This study reviews the composition and microstructure of the cell wall as well as the cellular structure in three plant materials (wood, parenchyma and arborescent palm stems) to explain the wide range in mechanical properties in plants as well as their remarkable mechanical efficiency.
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24

Morais, Patrícia L. D., Maria R. A. Miranda, Luis C. O. Lima, José D. Alves, Ricardo E. Alves, and José D. Silva. "Cell wall biochemistry of sapodilla (Manilkara zapota) submitted to 1-methylcyclopropene." Brazilian Journal of Plant Physiology 20, no. 2 (June 2008): 85–94. http://dx.doi.org/10.1590/s1677-04202008000200001.

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Sapodilla (Manilkara zapota) is a climacteric fruit that ripens shortly after harvest. Studies on its conservation during storage have been mainly restricted to using low temperatures and modified atmospheres. In this study we investigated the influence of 1-methylcyclopropene (1-MCP) on the physiological and biochemical changes that sapodilla cell wall undergoes during ripening and evaluated its potential to preserve sapodilla fruits at postharvest. Fruits were treated with ethylene antagonist 1-MCP at 300 nL L-1 for 12 h and then stored under a modified atmosphere at 25ºC for 23 d. 1-MCP significantly delayed softening of sapodilla for 11 d as a consequence of inhibition of cell wall degrading enzyme activities, and thus 1-MCP-treated fruit exhibited a less extensive solubilization of polyuronides, hemicellulose and of free neutral sugar when compared to control fruit. Results suggest that delayed softening of sapodilla is largely dependent on ethylene production and perception.
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25

Wilson, David B. "Studies ofThermobifida fusca plant cell wall degrading enzymes." Chemical Record 4, no. 2 (2004): 72–82. http://dx.doi.org/10.1002/tcr.20002.

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26

Franková, Lenka, and Stephen C. Fry. "Biochemistry and physiological roles of enzymes that ‘cut and paste’ plant cell-wall polysaccharides." Journal of Experimental Botany 64, no. 12 (August 14, 2013): 3519–50. http://dx.doi.org/10.1093/jxb/ert201.

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27

Chebli, Youssef, and Anja Geitmann. "Cellular growth in plants requires regulation of cell wall biochemistry." Current Opinion in Cell Biology 44 (February 2017): 28–35. http://dx.doi.org/10.1016/j.ceb.2017.01.002.

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28

Wilson, David B. "Three Microbial Strategies for Plant Cell Wall Degradation." Annals of the New York Academy of Sciences 1125, no. 1 (March 26, 2008): 289–97. http://dx.doi.org/10.1196/annals.1419.026.

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29

Höfte, Herman. "Plant Cell Biology: How to Pattern a Wall." Current Biology 20, no. 10 (May 2010): R450—R452. http://dx.doi.org/10.1016/j.cub.2010.03.046.

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30

Yang, Hui, Heath D. Watts, Virgil Gibilterra, T. Blake Weiss, Loukas Petridis, Daniel J. Cosgrove, and James D. Kubicki. "Quantum Calculations on Plant Cell Wall Component Interactions." Interdisciplinary Sciences: Computational Life Sciences 11, no. 3 (March 26, 2018): 485–95. http://dx.doi.org/10.1007/s12539-018-0293-4.

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31

Chebli, Youssef, Amir J. Bidhendi, Karuna Kapoor, and Anja Geitmann. "Cytoskeletal regulation of primary plant cell wall assembly." Current Biology 31, no. 10 (May 2021): R681—R695. http://dx.doi.org/10.1016/j.cub.2021.03.092.

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32

Dongowski, Gerhard, Rudolf Ehwald, Kerstin Luck, and Gisela Stoof. "Composition of cell wall microcapsules manufactured from Chenopodium album cell walls." Phytochemistry 31, no. 9 (September 1992): 3039–42. http://dx.doi.org/10.1016/0031-9422(92)83442-2.

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33

Saqib, Anam, Henrik Vibe Scheller, Folmer Fredslund, and Ditte Hededam Welner. "Molecular characteristics of plant UDP-arabinopyranose mutases." Glycobiology 29, no. 12 (May 15, 2019): 839–46. http://dx.doi.org/10.1093/glycob/cwz067.

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Abstract l-arabinofuranose is a ubiquitous component of the cell wall and various natural products in plants, where it is synthesized from cytosolic UDP-arabinopyranose (UDP-Arap). The biosynthetic machinery long remained enigmatic in terms of responsible enzymes and subcellular localization. With the discovery of UDP-Arap mutase in plant cytosol, the demonstration of its role in cell-wall arabinose incorporation and the identification of UDP-arabinofuranose transporters in the Golgi membrane, it is clear that the cytosolic UDP-Arap mutases are the key enzymes converting UDP-Arap to UDP-arabinofuranose for cell wall and natural product biosynthesis. This has recently been confirmed by several genotype/phenotype studies. In contrast to the solid evidence pertaining to UDP-Arap mutase function in vivo, the molecular features, including enzymatic mechanism and oligomeric state, remain unknown. However, these enzymes belong to the small family of proteins originally identified as reversibly glycosylated polypeptides (RGPs), which has been studied for >20 years. Here, we review the UDP-Arap mutase and RGP literature together, to summarize and systemize reported molecular characteristics and relations to other proteins.
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34

Pietruszka, Mariusz. "Solutions for a local equation of anisotropic plant cell growth: an analytical study of expansin activity." Journal of The Royal Society Interface 8, no. 60 (January 12, 2011): 975–87. http://dx.doi.org/10.1098/rsif.2010.0552.

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This paper presents a generalization of the Lockhart equation for plant cell/organ expansion in the anisotropic case. The intent is to take into account the temporal and spatial variation in the cell wall mechanical properties by considering the wall ‘extensibility’ ( Φ ), a time- and space-dependent parameter. A dynamic linear differential equation of a second-order tensor is introduced by describing the anisotropic growth process with some key biochemical aspects included. The distortion and expansion of plant cell walls initiated by expansins, a class of proteins known to enhance cell wall ‘extensibility’, is also described. In this approach, expansin proteins are treated as active agents participating in isotropic/anisotropic growth. Two-parameter models and an equation for describing α- and β-expansin proteins are proposed by delineating the extension of isolated wall samples, allowing turgor-driven polymer creep, where expansins weaken the non-covalent binding between wall polysaccharides. We observe that the calculated halftime ( t 1/2 = ε Φ 0 log 2) of stress relaxation due to expansin action can be described in mechanical terms.
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35

Cegelski, Lynette, Robert D. O’Connor, Dirk Stueber, Manmilan Singh, Barbara Poliks, and Jacob Schaefer. "Plant Cell-Wall Cross-Links by REDOR NMR Spectroscopy." Journal of the American Chemical Society 132, no. 45 (November 17, 2010): 16052–57. http://dx.doi.org/10.1021/ja104827k.

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36

Carpita, Nicholas C., and Maureen C. McCann. "Redesigning plant cell walls for the biomass-based bioeconomy." Journal of Biological Chemistry 295, no. 44 (August 31, 2020): 15144–57. http://dx.doi.org/10.1074/jbc.rev120.014561.

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Lignocellulosic biomass—the lignin, cellulose, and hemicellulose that comprise major components of the plant cell well—is a sustainable resource that could be utilized in the United States to displace oil consumption from heavy vehicles, planes, and marine-going vessels and commodity chemicals. Biomass-derived sugars can also be supplied for microbial fermentative processing to fuels and chemicals or chemically deoxygenated to hydrocarbons. However, the economic value of biomass might be amplified by diversifying the range of target products that are synthesized in living plants. Genetic engineering of lignocellulosic biomass has previously focused on changing lignin content or composition to overcome recalcitrance, the intrinsic resistance of cell walls to deconstruction. New capabilities to remove lignin catalytically without denaturing the carbohydrate moiety have enabled the concept of the “lignin-first” biorefinery that includes high-value aromatic products. The structural complexity of plant cell-wall components also provides substrates for polymeric and functionalized target products, such as thermosets, thermoplastics, composites, cellulose nanocrystals, and nanofibers. With recent advances in the design of synthetic pathways, lignocellulosic biomass can be regarded as a substrate at various length scales for liquid hydrocarbon fuels, chemicals, and materials. In this review, we describe the architectures of plant cell walls and recent progress in overcoming recalcitrance and illustrate the potential for natural or engineered biomass to be used in the emerging bioeconomy.
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37

Anderson, Charles T., and Joseph J. Kieber. "Dynamic Construction, Perception, and Remodeling of Plant Cell Walls." Annual Review of Plant Biology 71, no. 1 (April 29, 2020): 39–69. http://dx.doi.org/10.1146/annurev-arplant-081519-035846.

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Plant cell walls are dynamic structures that are synthesized by plants to provide durable coverings for the delicate cells they encase. They are made of polysaccharides, proteins, and other biomolecules and have evolved to withstand large amounts of physical force and to resist external attack by herbivores and pathogens but can in many cases expand, contract, and undergo controlled degradation and reconstruction to facilitate developmental transitions and regulate plant physiology and reproduction. Recent advances in genetics, microscopy, biochemistry, structural biology, and physical characterization methods have revealed a diverse set of mechanisms by which plant cells dynamically monitor and regulate the composition and architecture of their cell walls, but much remains to be discovered about how the nanoscale assembly of these remarkable structures underpins the majestic forms and vital ecological functions achieved by plants.
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38

Knox, P., Y. Verhertbruggen, and S. Marcus. "Dissection of cell wall arabinans in relation to cell functions and plant growth." Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 150, no. 3 (July 2008): S143. http://dx.doi.org/10.1016/j.cbpa.2008.04.357.

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39

Selisko, Barbara, and Rudolf Ehwald. "Entrapment of dextran in plant cell capsules by reversible change of cell wall permeability." Journal of Biochemical and Biophysical Methods 27, no. 4 (December 1993): 311–25. http://dx.doi.org/10.1016/0165-022x(93)90012-d.

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40

Friedman, William E., and Martha E. Cook. "The origin and early evolution of tracheids in vascular plants: integration of palaeobotanical and neobotanical data." Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 355, no. 1398 (June 29, 2000): 857–68. http://dx.doi.org/10.1098/rstb.2000.0620.

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Although there is clear evidence for the establishment of terrestrial plant life by the end of the Ordovician, the fossil record indicates that land plants remained extremely small and structurally simple until the Late Silurian. Among the events associated with this first major radiation of land plants is the evolution of tracheids, complex water–conducting cells defined by the presence of lignified secondary cell wall thickenings. Recent palaeobotanical analyses indicate that Early Devonian tracheids appear to possess secondary cell wall thickenings composed of two distinct layers: a degradation–prone layer adjacent to the primary cell wall and a degradation–resistant (possibly lignified) layer next to the cell lumen. In order to understand better the early evolution of tracheids, developmental and comparative studies of key basal (and potentially plesiomorphic) extant vascular plants have been initiated. Ultra–structural analysis and enzyme degradation studies of wall structure (to approximate diagenetic alterations of fossil tracheid structure) have been conducted on basal members of each of the two major clades of extant vascular plants: Huperzia (Lycophytina) and Equisetum (Euphyllophytina). This research demonstrates that secondary cell walls of extant basal vascular plants include a degradation–prone layer (‘template layer’) and a degradation–resistant layer (‘resistant layer’). This pattern of secondary cell wall formation in the water–conducting cells of extant vascular plants matches the pattern of wall thickenings in the tracheids of early fossil vascular plants and provides a key evolutionary link between tracheids of living vascular plants and those of their earliest fossil ancestors. Further studies of tracheid development and structure among basal extant vascular plants will lead to a more precise reconstruction of the early evolution of water–conducting tissues in land plants, and will add to the current limited knowledge of spatial, temporal and cytochemical aspects of cell wall formation in tracheary elements of vascular plants.
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41

Fontes, Carlos M. G. A., and Harry J. Gilbert. "Cellulosomes: Highly Efficient Nanomachines Designed to Deconstruct Plant Cell Wall Complex Carbohydrates." Annual Review of Biochemistry 79, no. 1 (June 7, 2010): 655–81. http://dx.doi.org/10.1146/annurev-biochem-091208-085603.

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42

Protsenko, M. A., N. L. Buza, A. A. Krinitsyna, E. A. Bulantseva, and N. P. Korableva. "Polygalacturonase-inhibiting protein is a structural component of plant cell wall." Biochemistry (Moscow) 73, no. 10 (October 2008): 1053–62. http://dx.doi.org/10.1134/s0006297908100015.

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43

Gorshkova, T. A., L. V. Kozlova, and P. V. Mikshina. "Spatial structure of plant cell wall polysaccharides and its functional significance." Biochemistry (Moscow) 78, no. 7 (July 2013): 836–53. http://dx.doi.org/10.1134/s0006297913070146.

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44

Haeger, Wiebke, Jana Henning, David G. Heckel, Yannick Pauchet, and Roy Kirsch. "Direct evidence for a new mode of plant defense against insects via a novel polygalacturonase-inhibiting protein expression strategy." Journal of Biological Chemistry 295, no. 33 (July 1, 2020): 11833–44. http://dx.doi.org/10.1074/jbc.ra120.014027.

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Plant cell wall–associated polygalacturonase-inhibiting proteins (PGIPs) are widely distributed in the plant kingdom. They play a crucial role in plant defense against phytopathogens by inhibiting microbial polygalacturonases (PGs). PGs hydrolyze the cell wall polysaccharide pectin and are among the first enzymes to be secreted during plant infection. Recent studies demonstrated that herbivorous insects express their own PG multi-gene families, raising the question whether PGIPs also inhibit insect PGs and protect plants from herbivores. Preliminary evidence suggested that PGIPs may negatively influence larval growth of the leaf beetle Phaedon cochleariae (Coleoptera: Chrysomelidae) and identified BrPGIP3 from Chinese cabbage (Brassica rapa ssp. pekinensis) as a candidate. PGIPs are predominantly studied in planta because their heterologous expression in microbial systems is problematic and instability and aggregation of recombinant PGIPs has complicated in vitro inhibition assays. To minimize aggregate formation, we heterologously expressed BrPGIP3 fused to a glycosylphosphatidylinositol (GPI) membrane anchor, immobilizing it on the extracellular surface of insect cells. We demonstrated that BrPGIP3_GPI inhibited several P. cochleariae PGs in vitro, providing the first direct evidence of an interaction between a plant PGIP and an animal PG. Thus, plant PGIPs not only confer resistance against phytopathogens, but may also aid in defense against herbivorous beetles.
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45

Hamann, Thorsten. "The plant cell wall integrity maintenance mechanism – A case study of a cell wall plasma membrane signaling network." Phytochemistry 112 (April 2015): 100–109. http://dx.doi.org/10.1016/j.phytochem.2014.09.019.

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46

Yeats, Trevor H., Antony Bacic, and Kim L. Johnson. "Plant glycosylphosphatidylinositol anchored proteins at the plasma membrane-cell wall nexus." Journal of Integrative Plant Biology 60, no. 8 (June 30, 2018): 649–69. http://dx.doi.org/10.1111/jipb.12659.

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47

Han, Yejun, and Hongzhang Chen. "A β-xylosidase from cell wall of maize: Purification, properties and its use in hydrolysis of plant cell wall." Journal of Molecular Catalysis B: Enzymatic 63, no. 3-4 (May 2010): 135–40. http://dx.doi.org/10.1016/j.molcatb.2010.01.004.

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48

Mnich, Ewelina, Nanna Bjarnholt, Aymerick Eudes, Jesper Harholt, Claire Holland, Bodil Jørgensen, Flemming Hofmann Larsen, et al. "Phenolic cross-links: building and de-constructing the plant cell wall." Natural Product Reports 37, no. 7 (2020): 919–61. http://dx.doi.org/10.1039/c9np00028c.

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49

Levy, Samuel, and L. Andrew Staehelin. "Synthesis, assembly and function of plant cell wall macromolecules selected." Current Biology 2, no. 12 (December 1992): 672. http://dx.doi.org/10.1016/0960-9822(92)90136-x.

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50

Veromann-Jürgenson, Linda-Liisa, Timothy J. Brodribb, Ülo Niinemets, and Tiina Tosens. "Variability in the chloroplast area lining the intercellular airspace and cell walls drives mesophyll conductance in gymnosperms." Journal of Experimental Botany 71, no. 16 (May 11, 2020): 4958–71. http://dx.doi.org/10.1093/jxb/eraa231.

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Abstract The photosynthetic efficiency of plants in different environments is controlled by stomata, hydraulics, biochemistry, and mesophyll conductance (gm). Recently, gm was demonstrated to be the key limitation of photosynthesis in gymnosperms. Values of gm across gymnosperms varied over 20-fold, but this variation was poorly explained by robust structure-bound integrated traits such as leaf dry mass per area. Understanding how the component structural traits control gm is central for identifying the determinants of variability in gm across plant functional and phylogenetic groups. Here, we investigated the structural traits responsible for gm in 65 diverse gymnosperms. Although the integrated morphological traits, shape, and anatomical characteristics varied widely across species, the distinguishing features of all gymnosperms were thick mesophyll cell walls and low chloroplast area exposed to intercellular airspace (Sc/S) compared with angiosperms. Sc/S and cell wall thickness were the fundamental traits driving variations in gm across gymnosperm species. Chloroplast thickness was the strongest limitation of gm among liquid-phase components. The variation in leaf dry mass per area was not correlated with the key ultrastructural traits determining gm. Thus, given the absence of correlating integrated easy-to-measure traits, detailed knowledge of underlying component traits controlling gm across plant taxa is necessary to understand the photosynthetic limitations across ecosystems.
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