共查询到20条相似文献,搜索用时 78 毫秒
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Transcription factor WRKY46 modulates the development of Arabidopsis lateral roots in osmotic/salt stress conditions via regulation of ABA signaling and auxin homeostasis
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Chun Xiao Li Gui Xin Li Yun Rong Wu Shao Jian Zheng 《The Plant journal : for cell and molecular biology》2015,84(1):56-69
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Ethylene promotes cadmium‐induced root growth inhibition through EIN3 controlled XTH33 and LSU1 expression in Arabidopsis
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Xiangpei Kong Cuiling Li Feng Zhang Qianqian Yu Shan Gao Maolin Zhang Huiyu Tian Jian Zhang Xianzheng Yuan Zhaojun Ding 《Plant, cell & environment》2018,41(10):2449-2462
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Brigid A. McKenna J. Bernhard Wehr Deirdre Mikkelsen F. Pax C. Blamey Neal W. Menzies 《Physiologia plantarum》2016,158(4):382-388
Aluminium (Al) toxicity adversely impacts plant productivity in acid soils by restricting root growth and although several mechanisms are involved the physiological basis of decreased root elongation remains unclear. Understanding the primary mechanisms of Al rhizotoxicity is hindered due to the rapid effects of soluble Al on root growth and the close proximity of many cellular components within the cell wall, plasma membrane, cytosol and nucleus with which Al may react. To overcome some of these difficulties, we report on a novel method for investigating Al interactions with Komagataeibacter xylinus bacterial cellulose (BC)‐pectin composites as cell wall analogues. The growth of K. xylinus in the presence of various plant cell wall polysaccharides, such as pectin, has provided a unique in vitro model system with which to investigate the interactions of Al with plant cell wall polysaccharides. The BC‐pectin composites reacted in a similar way with Al as do plant cell walls, providing insights into the effects of Al on the mechanical properties of the BC‐pectin composites as cell wall analogues. Our findings indicated that there were no significant effects of Al (4–160 μM) on the tensile stress, tensile strain or Young's modulus of the composites. This finding was consistent with cellulose, not pectin, being the major load bearing component in BC‐pectin composites, as is also the case in plant cell walls. 相似文献
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Monica De Caroli Elisa Manno Gabriella Piro Marcello S. Lenucci 《The Plant journal : for cell and molecular biology》2021,107(2):448-466
The xyloglucan endotransglucosylase/hydrolases (XTHs) are enzymes involved in cell wall assembly and growth regulation, cleaving and re-joining hemicellulose chains in the xyloglucan–cellulose network. Here, in a homologous system, we compare the secretion patterns of XTH11, XTH33 and XTH29, three members of the Arabidopsis thaliana XTH family, selected for the presence (XTH11 and XTH33) or absence (XTH29) of a signal peptide, and the presence of a transmembrane domain (XTH33). We show that XTH11 and XTH33 reached, respectively, the cell wall and plasma membrane through a conventional protein secretion (CPS) pathway, whereas XTH29 moves towards the apoplast following an unconventional protein secretion (UPS) mediated by exocyst-positive organelles (EXPOs). All XTHs share a common C-terminal functional domain (XET-C) that, for XTH29 and a restricted number of other XTHs (27, 28 and 30), continues with an extraterminal region (ETR) of 45 amino acids. We suggest that this region is necessary for the correct cell wall targeting of XTH29, as the ETR-truncated protein never reaches its final destination and is not recruited by EXPOs. Furthermore, quantitative real-time polymerase chain reaction analyses performed on 4-week-old Arabidopsis seedlings exposed to drought and heat stress suggest a different involvement of the three XTHs in cell wall remodeling under abiotic stress, evidencing stress-, organ- and time-dependent variations in the expression levels. Significantly, XTH29, codifying the only XTH that follows a UPS pathway, is highly upregulated with respect to XTH11 and XTH33, which code for CPS-secreted proteins. 相似文献
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LEUNIG_HOMOLOG transcriptional co‐repressor mediates aluminium sensitivity through PECTIN METHYLESTERASE46‐modulated root cell wall pectin methylesterification in Arabidopsis
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Xiaoyu Geng Walter J. Horst John F. Golz Joanne E. Lee Zhaojun Ding Zhong‐Bao Yang 《The Plant journal : for cell and molecular biology》2017,90(3):491-504
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