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Relevant bibliographies by topics / Stigmatic surfaces

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Journal articles

Academic literature on the topic 'Stigmatic surfaces'

Author: Grafiati

Published: 1 April 2023

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Journal articles on the topic "Stigmatic surfaces"

1

Carmo-Oliveira, Renata, and Berta Lange de Morretes. "Stigmatic surface in the Vochysiaceae: reproductive and taxonomic implications." Acta Botanica Brasilica 23, no. 3 (2009): 780–85. http://dx.doi.org/10.1590/s0102-33062009000300018.

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The Vochysiaceae are Neotropical trees and shrubs, common in the savanna areas in Central Brazil (Cerrados). The family has been traditionally divided into two tribes: Erismeae, with three genera, and Vochysieae, with five genera. We investigated the stigmatic surface of six Vochysiaceae species, belonging to four genera of Vochysieae: Vochysia, Salvertia, Callisthene and Qualea. Flowers and buds at different developmental stages were collected. Morphological features were observed on fresh material and stigmatic receptivity was inferred based on esterasic activity. Pistils were fixed and embe

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Wetzstein, Hazel Y., and S. Edward Law. "Enhanced Visualization of the Fine Structure of the Stigmatic Surface of Citrus using Pre-fixation Washes." Journal of the American Society for Horticultural Science 137, no. 5 (2012): 290–93. http://dx.doi.org/10.21273/jashs.137.5.290.

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Stigma characteristics and morphology can be useful in taxonomic and phylogenetic studies, indicate relationships in stigma function and receptivity, and be valuable in evaluating pollen–stigma interactions. Problematic is that in some taxa, copious stigmatic exudate can obscure the fine structural details of the stigmatic surface. Such is the case for Citrus, which has a wet stigma type on which abundant exudate inundates surface papillae. The components of stigmatic surface compounds are highly heterogeneous and include carbohydrates, proteins, lipids, glycoproteins, and phenolic compounds.

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Courtial, Johannes, Stephen Oxburgh, and Tomáš Tyc. "Direct stigmatic imaging with curved surfaces." Journal of the Optical Society of America A 32, no. 3 (2015): 478. http://dx.doi.org/10.1364/josaa.32.000478.

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Wetzstein, Hazel Y., and Darrell Sparks. "Stigma-Pollen Interactions in Pecan." Journal of the American Society for Horticultural Science 114, no. 2 (1989): 355–59. http://dx.doi.org/10.21273/jashs.114.2.355.

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Abstract Early pollen-stigma responses were observed microscopically in controlled pollinations of pecan [Carya illinoensis (Wangenh) C. Koch]. Receptive stigmatic surfaces have rounded, basally attached projecting papillae with an irregularly patterned, noncopious exudate. Polarly flattened pollen, characteristic of grains at anthesis, becomes rounded and hydrated by 1 hr after pollination. Pollen tube emergence is visible within 3 hr of pollination, and extensive pollen tube growth on the stigma is apparent after 8 to 12 hr. Tube growth generally occurs along the stigmatic surface and betwee

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Cui, Zhouqi, Regan B. Huntley, Neil P. Schultes, Kaleem U. Kakar, Ching-Hong Yang, and Quan Zeng. "Expression of the Type III Secretion System Genes in Epiphytic Erwinia amylovora Cells on Apple Stigmas Benefits Endophytic Infection at the Hypanthium." Molecular Plant-Microbe Interactions® 34, no. 10 (2021): 1119–27. http://dx.doi.org/10.1094/mpmi-06-21-0152-r.

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Erwinia amylovora causes fire blight on rosaceous plants. One of the major entry points of E. amylovora into hosts is flowers, where E. amylovora proliferates epiphytically on stigmatic and hypanthium surfaces and, subsequently, causes endophytic infection at the hypanthium. The type III secretion system (T3SS) is an important virulence factor in E. amylovora. Although the role of T3SS during endophytic infection is well characterized, its expression during epiphytic colonization and role in the subsequent infection is less understood. Here, we investigated T3SS gene expression in epiphytic E.

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Zietsman, P. C. "Reproductive biology of Stomatium bolusiae (Aizoaceae: Ruschioideae)." Bothalia 43, no. 1 (2013): 23–28. http://dx.doi.org/10.4102/abc.v43i1.83.

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Flowers of Stomatium bolusiae are self-incompatible. The species exhibits crepuscular and nocturnal anthesis, exploiting two different pollination mechanisms. The structure of the hermaphroditic flower appears not to favour cross-pollination. The stigmata are never exposed to pollinating agents, which gain access to the floral rewards by forcing their way between the anthers. Clogging of the stigmatic surfaces by self-pollen is common. Nocturnal anthesis, concomitant with the nocturnal release of attractants and the offering of rewards, indicates that this species is primarily phalaenophilous

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7

Silva-Lora, Alberto, and Rafael Torres. "Explicit Cartesian oval as a superconic surface for stigmatic imaging optical systems with real or virtual source or image." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 476, no. 2235 (2020): 20190894. http://dx.doi.org/10.1098/rspa.2019.0894.

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Cartesian ovals, also known as rigorously stigmatic surfaces, are the simplest optical systems capable of producing a perfect point image. Exist both implicit and explicit expressions to represent these surfaces, but they treat both refractive and reflective surfaces independently. Because of the complexity of explicit expressions, the ray-tracing techniques for these surfaces are implemented using third-party software. In this paper, we express Cartesian ovals as a degenerated superconic curve and get a new explicit formulation for Cartesian ovals capable of treating image formation using bot

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PANDA, SAURIS, and J. J. F. E. DE WILDE. "Diversity and taxonomic value of stigmatic surfaces in Begoniaceae: SEM analysis." Acta Botanica Neerlandica 44, no. 2 (1995): 139–50. http://dx.doi.org/10.1111/j.1438-8677.1995.tb00776.x.

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9

Doskolovich, L. L., D. A. Bykov, G. I. Greisukh, and Y. S. Strelkov. "Design of a stigmatic lens with minimal Fresnel losses." Computer Optics 45, no. 3 (2021): 350–55. http://dx.doi.org/10.18287/2412-6179-co-813.

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A method for designing double aspheric lenses enabling minimal Fresnel losses in the class of stigmatic lenses is considered. Minimization of the Fresnel losses is provided by ensuring equal ray-deviation angles on both aspheric surfaces of the lens. The design of the lens is reduced to the integration of an explicit ordinary differential equation. Simple analytical approximations for the lens profiles are also presented.

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10

Wood, Bruce W. "Flavonoids, Alkali Earth, and Rare Earth Elements Affect Pecan Pollen Germination." HortScience 52, no. 1 (2017): 85–88. http://dx.doi.org/10.21273/hortsci11426-16.

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The factors regulating pecan [Carya illinoinensis (Wangenh.) K. Koch] pollen grain germination are poorly understood for both in vitro pollen viability tests and on receptive stigmatic surfaces of pistillate flowers. Potential regulating factors include flavonols, calcium (Ca), Ca-like alkali earth elements (AEEs), and rare earth elements (REEs). When various concentrations of certain naturally occurring simple flavonols (e.g., quercetin, kaempferol, myricetin, naringenin, and hesperetin) were tested in vitro by adding to standard pecan pollen germination medium, hesperetin, myricetin, and kae

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