scholarly journals Involvement of CmWRKY10 in Drought Tolerance of Chrysanthemum through the ABA-Signaling Pathway

2016 ◽  
Vol 17 (5) ◽  
pp. 693 ◽  
Author(s):  
Muhammad Jaffar ◽  
Aiping Song ◽  
Muhammad Faheem ◽  
Sumei Chen ◽  
Jiafu Jiang ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Signaling Pathway ◽  
Aba Signaling

scholarly journals VlbZIP30 of grapevine functions in drought tolerance via the abscisic acid core signaling pathway

2017 ◽  
Author(s):  
Mingxing Tu ◽  
Xianhang Wang ◽  
Yanxun Zhu ◽  
Dejun Wang ◽  
Xuechuan Zhang ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Signaling Pathway ◽  
Growth And Development ◽  
Transgenic Arabidopsis ◽  
Dehydration Stress ◽  
Aba Signaling ◽  
Group A ◽  
Cotyledon Greening

AbstractDrought stress limits the growth and development of grapevines, thereby reducing productivity, but the mechanisms by which grapevines respond to drought stress remain largely uncharacterized. Here, we characterized a group A bZIP gene from ‘Kyoho’ grapevine, VlbZIP30, which was shown to be induced by abscisic acid (ABA) and dehydration stress. Overexpression of VlbZIP30 in transgenic Arabidopsis enhanced dehydration tolerance during seed germination, and in the seedling and adult stages. Transcriptome analysis revealed that a major proportion of ABA- and/or drought-responsive genes are transcriptionally regulated by VlbZIP30 during ABA or mannitol treatment at the cotyledon greening stage. We identified an A. thaliana G-box motif (CACGTG) and a potential grapevine G-box motif (MCACGTGK) in the promoters of the 39 selected A. thaliana genes up-regulated in the transgenic plants and in the 35 grapevine homologs, respectively. Subsequently, using two grapevine-related databases, we found that 74% and 84% (a total of 27 genes) of the detected grapevine genes were significantly up-regulated by ABA and drought stress, respectively, suggesting that these 27 genes involve in ABA or dehydration stress and may be regulated by VlbZIP30 in grapevine. We propose that VlbZIP30 functions as a positive regulator of drought-responsive signaling in the ABA core signaling pathway.HighlightVlbZIP30 positively regulate plant drought tolerance through regulated the expression of 27 grapevine candidate genes via G-box cis-element (MCACGTGK) in ABA signaling pathway.

Arbuscular mycorrhiza enhances drought tolerance of tomato plants by regulating the 14-3-3 genes in the ABA signaling pathway

2018 ◽  
Vol 125 ◽  
pp. 213-221 ◽  
Author(s):  
Lijiao Xu ◽  
Tao Li ◽  
Zhaoxiang Wu ◽  
Haiyan Feng ◽  
Meng Yu ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Arbuscular Mycorrhiza ◽  
Signaling Pathway ◽  
Aba Signaling ◽  
Tomato Plants

scholarly journals The OsOXO2, OsOXO3 and OsOXO4 Positively Regulate Panicle Blast Resistance in Rice

Rice ◽  
2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Jingfang Dong ◽  
Lian Zhou ◽  
Aiqing Feng ◽  
Shaohong Zhang ◽  
Hua Fu ◽  
...  
Keyword(s):  
Signaling Pathways ◽  
Signaling Pathway ◽  
Molecular Mechanisms ◽  
Blast Resistance ◽  
Aba Signaling ◽  
Leaf Blast ◽  
Expression Levels ◽  
Panicle Blast ◽  
Localization Analysis ◽  
Sa Signaling

Abstract Background Although panicle blast is more destructive to yield loss than leaf blast in rice, the cloned genes that function in panicle blast resistance are still very limited and the molecular mechanisms underlying panicle blast resistance remain largely unknown. Results In the present study, we have confirmed that the three Oxalate oxidase (OXO) genes, OsOXO2, OsOXO3 and OsOXO4 from a blast-resistant cultivar BC10 function in panicle blast resistance in rice. The expression of OsOXO2, OsOXO3 and OsOXO4 were induced by panicle blast inoculation. Subcellular localization analysis revealed that the three OXO proteins are all localized in the nucleus and cytoplasm. Simultaneous silencing of OsOXO2, OsOXO3 and OsOXO4 decreased rice resistance to panicle blast, whereas the OsOXO2, OsOXO3 and OsOXO4 overexpression rice plants individually showed enhanced panicle blast resistance. More H2O2 and higher expression levels of PR genes were observed in the overexpressing plants than in the control plants, while the silencing plants exhibited less H2O2 and lower expression levels of PR genes compared to the control plants. Moreover, phytohormone treatment and the phytohormone signaling related gene expression analysis showed that panicle blast resistance mediated by the three OXO genes was associated with the activation of JA and ABA signaling pathways but suppression of SA signaling pathway. Conclusion OsOXO2, OsOXO3 and OsOXO4 positively regulate panicle blast resistance in rice. The OXO genes could modulate the accumulation of H2O2 and expression levels of PR gene in plants. Moreover, the OXO genes mediated panicle blast resistance could be regulated by ABA, SA and JA, and may be associated with the activation of JA and ABA signaling pathways but suppression of the SA signaling pathway.

The tomato IQD gene SUN24 regulates seed germination through ABA signaling pathway

Planta ◽  
2018 ◽  
Vol 248 (4) ◽  
pp. 919-931 ◽  
Author(s):  
Lulu Bi ◽  
Lin Weng ◽  
Zhuyan Jiang ◽  
Han Xiao
Keyword(s):  
Seed Germination ◽  
Signaling Pathway ◽  
Aba Signaling

scholarly journals Arabidopsis CPK6 positively regulates ABA signaling and drought tolerance through phosphorylating ABA-responsive element-binding factors

2019 ◽  
Vol 71 (1) ◽  
pp. 188-203 ◽  
Author(s):  
Hanfeng Zhang ◽  
Daoyin Liu ◽  
Bo Yang ◽  
Wu-Zhen Liu ◽  
Bangbang Mu ◽  
...  
Keyword(s):  
Transcription Factors ◽  
Protein Kinase ◽  
Seed Germination ◽  
Drought Tolerance ◽  
Aba Signaling ◽  
Dependent Protein Kinase ◽  
Calcium Dependent ◽  
Dependent Protein ◽  
Responsive Element ◽  
Calcium Dependent Protein Kinase

Arabidopsis calcium-dependent protein kinase CPK6 positively regulates seed germination, seedling growth, and drought tolerance via phosphorylating ABF and ABI5 transcription factors.

scholarly journals GmNAC81 Inversely Modulates Leaf Senescence and Drought Tolerance

2020 ◽  
Vol 11 ◽  
Author(s):  
Dalton O. Ferreira ◽  
Otto T. Fraga ◽  
Maiana R. Pimenta ◽  
Hanna D. N. Caetano ◽  
João Paulo B. Machado ◽  
...  
Keyword(s):  
Cell Death ◽  
Drought Tolerance ◽  
Leaf Senescence ◽  
Control Line ◽  
Aba Signaling ◽  
Downstream Effector ◽  
Relative Water ◽  
Cell Death Program ◽  
Transgenic Lines ◽  
Increased Sensitivity

Glycine max NAC81 (GmNAC81) is a downstream effector of the DCD/NRP-mediated cell death signaling, which interacts with GmNAC30 to fully induce the caspase 1-like vacuolar processing enzyme (VPE) expression, the executioner of the cell death program. GmNAC81 has been previously shown to positively modulate leaf senescence via the NRP/GmNAC81/VPE signaling module. Here, we examined the transcriptome induced by GmNAC81 overexpression and leaf senescence and showed that GmNAC81 further modulates leaf senescence by regulating an extensive repertoire of functionally characterized senescence-associated genes (SAGs). Because the NRP/GmNAC81/VPE signaling circuit also relays stress-induced cell death signals, we examined the effect of GmNAC81 overexpression in drought responses. Enhanced GmNAC81 expression in the transgenic lines increased sensitivity to water deprivation. Under progressive drought, the GmNAC81-overexpressing lines displayed severe leaf wilting, a larger and faster decline in leaf Ψw, relative water content (RWC), photosynthesis rate, stomatal conductance, and transpiration rate, in addition to higher Ci/Ca and lower Fm/Fv ratios compared to the BR16 control line. Collectively, these results indicate that the photosynthetic activity and apparatus were more affected by drought in the transgenic lines. Consistent with hypersensitivity to drought, chlorophyll loss, and lipid peroxidation were higher in the GmNAC81-overexpressing lines than in BR16 under dehydration. In addition to inducing VPE expression, GmNAC81 overexpression uncovered the regulation of typical drought-responsive genes. In particular, key regulators and effectors of ABA signaling were suppressed by GmNAC81 overexpression. These results suggest that GmNAC81 may negatively control drought tolerance not only via VPE activation but also via suppression of ABA signaling.

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