Bibliographies thématiques / Plant hypergravity

Littérature scientifique sur le sujet « Plant hypergravity »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Plant hypergravity"

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Hattori, Takayuki, Kouichi Soga, Kazuyuki Wakabayashi et Takayuki Hoson. « An Arabidopsis PTH2 Gene Is Responsible for Gravity Resistance Supporting Plant Growth under Different Gravity Conditions ». Life 12, no 10 (14 octobre 2022) : 1603. http://dx.doi.org/10.3390/life12101603.

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Terrestrial plants respond to and resist gravitational force. The response is termed “gravity resistance”, and centrifugal hypergravity conditions are efficient for investigating its nature and mechanism. A functional screening of Arabidopsis T-DNA insertion lines for the suppression rate of elongation growth of hypocotyls under hypergravity conditions was performed in this study to identify the genes required for gravity resistance. As a result, we identified PEPTIDYL-tRNA HYDROLASE II (PTH2). In the wild type, elongation growth was suppressed by hypergravity, but this did not happen in the pth2 mutant. Lateral growth, dynamics of cortical microtubules, mechanical properties of cell walls, or cell wall thickness were also not affected by hypergravity in the pth2 mutant. In other words, the pth2 mutant did not show any significant hypergravity responses. However, the gravitropic curvature of hypocotyls of the pth2 mutant was almost equal to that of the wild type, indicating that the PTH2 gene is not required for gravitropism. It is suggested by these results that PTH2 is responsible for the critical processes of gravity resistance in Arabidopsis hypocotyls.
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Soga, Kouichi, Kazuyuki Wakabayashi, Seiichiro Kamisaka et Takayuki Hoson. « Mechanoreceptors rather than sedimentable amyloplasts perceive the gravity signal in hypergravity-induced inhibition of root growth in azuki bean ». Functional Plant Biology 32, no 2 (2005) : 175. http://dx.doi.org/10.1071/fp04145.

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Elongation of primary roots of azuki bean (Vigna angularis Ohwi et Ohashi) was suppressed under hypergravity conditions produced by centrifugation, such that the growth rate decreased in proportion to the logarithm of the magnitude of the gravity. The removal of the root cap did not influence the hypergravity-induced inhibition of root growth, although it completely inhibited the gravitropic root curvature. Lanthanum and gadolinium, blockers of mechanoreceptors, nullified the growth-inhibitory effect of hypergravity. These results suggest that the gravity signal for the hypergravity-induced inhibition of root growth is perceived independently from that of gravitropism, which involves amyloplasts as statoliths. Horizontal and basipetal hypergravity suppressed root growth as did acropetal hypergravity, all of which were nullified by the presence of lanthanum or gadolinium. These findings suggest that mechanoreceptors on the plasma membrane perceive the gravity signal independently of the direction of the stimuli and roots may utilise it to regulate their growth rate.
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Park, J., M. L. Salmi, W. W. A. Wan Salim, A. Rademacher, B. Wickizer, A. Schooley, J. Benton et al. « An autonomous lab on a chip for space flight calibration of gravity-induced transcellular calcium polarization in single-cell fern spores ». Lab on a Chip 17, no 6 (2017) : 1095–103. http://dx.doi.org/10.1039/c6lc01370h.

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Musgrave, M. E., A. Kuang, J. Allen, J. Blasiak et J. J. W. A. van Loon. « Brassica rapa L. seed development in hypergravity ». Seed Science Research 19, no 2 (juin 2009) : 63–72. http://dx.doi.org/10.1017/s0960258509303360.

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AbstractPrevious experiments had shown that microgravity adversely affected seed development in Brassica rapa L. We tested the hypothesis that gravity controls seed development via modulation of gases around the developing seeds, by studying how hypergravity affects the silique microenvironment and seed development. Using an in vitro silique maturation system, we sampled internal silique gases for 16 d late in the seed maturation sequence at 4 g or 1 g. The carbon dioxide level was significantly higher inside the 4-g siliques, and the immature seeds became heavier than those maturing at 1 g. Pollination and early embryo development were also studied by growing whole plants at 2 g or 4 g for 16 d inside chambers mounted on a large-diameter centrifuge. Each day the rotor was briefly stopped to permit manual pollination of flowers, thereby producing cohorts of same-aged siliques for comparison with stationary control material. The loss of starch and soluble carbohydrates during seed development was accelerated in hypergravity, with seeds developing at 4 g more advanced by 2 d than those at 1 g. Seeds produced at 4 g contained more lipid than those at 1 g. Taken together, these results indicate that hypergravity enhances gas availability to the developing embryos. Gravity's role in seed development is of importance to the space programme because of the plan to use plants for food production and habitat regeneration in extraterrestrial settings. These results are significant because they underscore the tight co-regulation of Brassica seed development and the atmosphere maintained inside the siliques.
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Souza, Tiago Alves Jorge de, Greice Lubini, Andrea Carla Quiapim et Tiago Campos Pereira. « Nicotiana benthamiana seeds tolerate hyperaccelerations up to 400,000 x g ». Research, Society and Development 10, no 8 (12 juillet 2021) : e27510817323. http://dx.doi.org/10.33448/rsd-v10i8.17323.

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Exposure to hypergravity can alter the viability, morphology, development and behavior of living beings. Thus, the analysis of these factors is essential when considering life on supermassive planets, as well as in 'ballistic panspermia' scenarios related to the ejection of rocks from the surface of a planet, which could serve as transfer vehicles to spread the life between planets within a solar system. Studies analyzing the effects of hypergravity regimes are abundant in the literature, however, only a few researches carried out experiments using conditions of the order of 105 x g. In addition, the only plant species tested so far, as an entire structure instead of detached parts, exposed to gravity stress of this order of magnitude in its entirety was Oryza sativa, whose seeds were able to germinate after being exposed to 450,000 x g. Recently, our research group demonstrated that some free-living nematode species can support 400,000 x g. In the present study, we report that seeds of the plant model Nicotiana benthamiana exposed to 400,000 x g for 1h are able to germinate into fully normal young seedlings, with no apparent morphological alterations. Since N. benthamiana is used in laboratories worldwide and an easy to cultivate plant model, theoretical and experimental models of lithopanspermia and life in supermassive planets may benefit from it.
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Musgrave, Mary E., Anxiu Kuang, Joan Allen et Jack J. W. A. van Loon. « Hypergravity prevents seed production in Arabidopsis by disrupting pollen tube growth ». Planta 230, no 5 (1 août 2009) : 863–70. http://dx.doi.org/10.1007/s00425-009-0992-5.

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kasahara, Hirokazu, Masahide Shiwa, Yuichi Takeuchi et Mitsuhiro Yamada. « Effects of hypergravity on the elongation growth in radish and cucumber hypocotyls ». Journal of Plant Research 108, no 1 (mars 1995) : 59–64. http://dx.doi.org/10.1007/bf02344306.

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Fitzelle, Karli J., et John Z. Kiss. « Restoration of gravitropic sensitivity in starch‐deficient mutants of Arabidopsis by hypergravity ». Journal of Experimental Botany 52, no 355 (février 2001) : 265–75. http://dx.doi.org/10.1093/jexbot/52.355.265.

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Hoson, T., K. Nishitani, K. Miyamoto, J. Ueda, S. Kamisaka, R. Yamamoto et Y. Masuda. « Effects of hypergravity on growth and cell wall properties of cress hypocotyls ». Journal of Experimental Botany 47, no 4 (1996) : 513–17. http://dx.doi.org/10.1093/jxb/47.4.513.

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Takemura, Kaori, Hiroyuki Kamachi, Atsushi Kume, Tomomichi Fujita, Ichirou Karahara et Yuko T. Hanba. « A hypergravity environment increases chloroplast size, photosynthesis, and plant growth in the moss Physcomitrella patens ». Journal of Plant Research 130, no 1 (28 novembre 2016) : 181–92. http://dx.doi.org/10.1007/s10265-016-0879-z.

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Chapitres de livres sur le sujet "Plant hypergravity"

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Soga, Kouichi, Sachiko Yano, Shouhei Matsumoto et Takayuki Hoson. « Hypergravity Experiments to Evaluate Gravity Resistance Mechanisms in Plants ». Dans Methods in Molecular Biology, 307–19. New York, NY : Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-2697-8_21.

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Vidyasagar, Pandit, Sagar Jagtap, Amit Nirhali, Santosh Bhaskaran et Vishakha Hase. « Effects of Hypergravity on the Chlorophyll Content and Growth of Root and Shoot During Development in Rice Plants ». Dans Photosynthesis. Energy from the Sun, 1599–602. Dordrecht : Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6709-9_343.

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