共查询到20条相似文献,搜索用时 15 毫秒
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A Trichoderma atroviride stress‐activated MAPK pathway integrates stress and light signals
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![点击此处可从《Molecular microbiology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Edgardo Ulises Esquivel‐Naranjo Mónica García‐Esquivel Elizabeth Medina‐Castellanos Víctor Alejandro Correa‐Pérez Jorge Luis Parra‐Arriaga Fidel Landeros‐Jaime José Antonio Cervantes‐Chávez Alfredo Herrera‐Estrella 《Molecular microbiology》2016,100(5):860-876
Cells possess stress‐activated protein kinase (SAPK) signalling pathways, which are activated practically in response to any cellular insult, regulating responses for survival and adaptation to harmful environmental changes. To understand the function of SAPK pathways in T. atroviride, mutants lacking the MAPKK Pbs2 and the MAPK Tmk3 were analysed under several cellular stresses, and in their response to light. All mutants were highly sensitive to cellular insults such as osmotic and oxidative stress, cell wall damage, high temperature, cadmium, and UV irradiation. Under oxidative stress, the Tmk3 pathway showed specific roles during development, which in conidia are essential for tolerance to oxidant agents and appear to play a minor role in mycelia. The function of this pathway was more evident in Δpbs2 and Δtmk3 mutant strains when combining oxidative stress or cell wall damage with light. Light stimulates tolerance to osmotic stress through Tmk3 independently of the photoreceptor Blr1. Strikingly, photoconidiation and expression of blue light regulated genes was severally affected in Δtmk3 and Δpbs2 strains, indicating that this pathway regulates light responses. Furthermore, Tmk3 was rapidly phosphorylated upon light exposure. Thus, our data indicate that Tmk3 signalling cooperates with the Blr photoreceptor complex in the activation of gene expression. 相似文献
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Soybean DREB1/CBF‐type transcription factors function in heat and drought as well as cold stress‐responsive gene expression
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![点击此处可从《The Plant journal : for cell and molecular biology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Satoshi Kidokoro Keitaro Watanabe Teppei Ohori Takashi Moriwaki Kyonoshin Maruyama Junya Mizoi Nang Myint Phyu Sin Htwe Yasunari Fujita Sachiko Sekita Kazuo Shinozaki Kazuko Yamaguchi‐Shinozaki 《The Plant journal : for cell and molecular biology》2015,81(3):505-518
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AtDjB1 is a member of the Arabidopsis thaliana J‐protein family. AtDjB1 is targeted to the mitochondria and plays a crucial role in A. thaliana heat and oxidative stress resistance. Herein, the role of AtDjB1 in adapting to saline and drought stress was studied in A. thaliana. AtDjB1 expression was induced through salinity, dehydration and abscisic acid (ABA) in young seedlings. Reverse genetic analyses indicate that AtDjB1 is a negative regulator in plant osmotic stress tolerance. Further, AtDjB1 knockout mutant plants (atj1‐1) exhibited greater ABA sensitivity compared with the wild‐type (WT) plants and the mutant lines with a rescued AtDjB1 gene. AtDjB1 gene knockout also altered the expression of several ABA‐responsive genes, which suggests that AtDjB1 is involved in osmotic stress tolerance through its effects on ABA signaling pathways. Moreover, atj1‐1 plants exhibited higher glucose levels and greater glucose sensitivity in the post‐germination development stage. Applying glucose promoted an ABA response in seedlings, and the promotion was more evident in atj1‐1 than WT seedlings. Taken together, higher glucose levels in atj1‐1 plants are likely responsible for the greater ABA sensitivity and increased osmotic stress tolerance. 相似文献
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Histone acetyltransferase GCN5 is essential for heat stress‐responsive gene activation and thermotolerance in Arabidopsis
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Zhaorong Hu Na Song Mei Zheng Xinye Liu Zhenshan Liu Jiewen Xing Junhua Ma Weiwei Guo Yingyin Yao Huiru Peng Mingming Xin Dao‐Xiu Zhou Zhongfu Ni Qixin Sun 《The Plant journal : for cell and molecular biology》2015,84(6):1178-1191
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Jianhua Zhu Byeong‐Ha Lee Mike Dellinger Xinping Cui Changqing Zhang Shang Wu Eugene A. Nothnagel Jian‐Kang Zhu 《The Plant journal : for cell and molecular biology》2010,63(1):128-140
Osmotic stress imposed by soil salinity and drought stress significantly affects plant growth and development, but osmotic stress sensing and tolerance mechanisms are not well understood. Forward genetic screens using a root‐bending assay have previously identified salt overly sensitive (sos) mutants of Arabidopsis that fall into five loci, SOS1 to SOS5. These loci are required for the regulation of ion homeostasis or cell expansion under salt stress, but do not play a major role in plant tolerance to the osmotic stress component of soil salinity or drought. Here we report an additional sos mutant, sos6‐1, which defines a locus essential for osmotic stress tolerance. sos6‐1 plants are hypersensitive to salt stress and osmotic stress imposed by mannitol or polyethylene glycol in culture media or by water deficit in the soil. SOS6 encodes a cellulose synthase‐like protein, AtCSLD5. Only modest differences in cell wall chemical composition could be detected, but we found that sos6‐1 mutant plants accumulate high levels of reactive oxygen species (ROS) under osmotic stress and are hypersensitive to the oxidative stress reagent methyl viologen. The results suggest that SOS6/AtCSLD5 is not required for normal plant growth and development but has a critical role in osmotic stress tolerance and this function likely involves its regulation of ROS under stress. 相似文献
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Asif Khan Anna Garbelli Serena Grossi Assa Florentin Giorgia Batelli Tania Acuna Gaston Zolla Yuval Kaye Laju K. Paul Jian‐Kang Zhu Giovanni Maga Gideon Grafi Simon Barak 《The Plant journal : for cell and molecular biology》2014,79(1):28-43
DEAD‐box RNA helicases are involved in many aspects of RNA metabolism and in diverse biological processes in plants. Arabidopsis thaliana mutants of two DEAD‐box RNA helicases, STRESS RESPONSE SUPPRESSOR1 (STRS1) and STRS2 were previously shown to exhibit tolerance to abiotic stresses and up‐regulated stress‐responsive gene expression. Here, we show that Arabidopsis STRS‐overexpressing lines displayed a less tolerant phenotype and reduced expression of stress‐induced genes confirming the STRSs as attenuators of Arabidopsis stress responses. GFP–STRS fusion proteins exhibited localization to the nucleolus, nucleoplasm and chromocenters and exhibited relocalization in response to abscisic acid (ABA) treatment and various stresses. This relocalization was reversed when stress treatments were removed. The STRS proteins displayed mis‐localization in specific gene‐silencing mutants and exhibited RNA‐dependent ATPase and RNA‐unwinding activities. In particular, STRS2 showed mis‐localization in three out of four mutants of the RNA‐directed DNA methylation (RdDM) pathway while STRS1 was mis‐localized in the hd2c mutant that is defective in histone deacetylase activity. Furthermore, heterochromatic RdDM target loci displayed reduced DNA methylation and increased expression in the strs mutants. Taken together, our findings suggest that the STRS proteins are involved in epigenetic silencing of gene expression to bring about suppression of the Arabidopsis stress response. 相似文献
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A RhABF2/Ferritin module affects rose (Rosa hybrida) petal dehydration tolerance and senescence by modulating iron levels
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Jitao Liu Youwei Fan Jing Zou Yiqun Fang Linghao Wang Meng Wang Xinqiang Jiang Yiqing Liu Junping Gao Changqing Zhang 《The Plant journal : for cell and molecular biology》2017,92(6):1157-1169
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Shengting Li Hao Chen Zhi Hou Yu Li Cuiling Yang Daojie Wang Chun‐Peng Song 《植物学报(英文版)》2020,62(7):998-1016
Cotton (Gossypium hirsutum L.) is a major crop and the main source of natural fiber worldwide. Because various abiotic and biotic stresses strongly influence cotton fiber yield and quality, improved stress resistance of this crop plant is urgently needed. In this study, we used Gateway technology to construct a normalized full‐length cDNA overexpressing (FOX) library from upland cotton cultivar ZM12 under various stress conditions. The library was transformed into Arabidopsis to produce a cotton‐FOX‐Arabidopsis library. Screening of this library yielded 6,830 transgenic Arabidopsis lines, of which 757 were selected for sequencing to ultimately obtain 659 cotton ESTs. GO and KEGG analyses mapped most of the cotton ESTs to plant biological process, cellular component, and molecular function categories. Next, 156 potential stress‐responsive cotton genes were identified from the cotton‐FOX‐Arabidopsis library under drought, salt, ABA, and other stress conditions. Four stress‐related genes identified from the library, designated as GhCAS, GhAPX, GhSDH, and GhPOD, were cloned from cotton complementary DNA, and their expression patterns under stress were analyzed. Phenotypic experiments indicated that overexpression of these cotton genes in Arabidopsis affected the response to abiotic stress. The method developed in this study lays a foundation for high‐throughput cloning and rapid identification of cotton functional genes. 相似文献
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Change of function of the wheat stress‐responsive transcriptional repressor TaRAP2.1L by repressor motif modification
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![点击此处可从《Plant biotechnology journal》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Amritha Amalraj Sukanya Luang Manoj Yadav Kumar Pradeep Sornaraj Omid Eini Nataliya Kovalchuk Natalia Bazanova Yuan Li Nannan Yang Serik Eliby Peter Langridge Maria Hrmova Sergiy Lopato 《Plant biotechnology journal》2016,14(2):820-832
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