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ETHYLENE RESPONSE FACTOR 96 positively regulates Arabidopsis resistance to necrotrophic pathogens by direct binding to GCC elements of jasmonate – and ethylene‐responsive defence genes
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Jérémy Catinot Jing‐Bo Huang Pin‐Yao Huang Min‐Yuan Tseng Ying‐Lan Chen Shin‐Yuan Gu Wan‐Sheng Lo Long‐Chi Wang Yet‐Ran Chen Laurent Zimmerli 《Plant, cell & environment》2015,38(12):2721-2734
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Overexpression of Hevea brasiliensis ethylene response factor HbERF‐IXc5 enhances growth and tolerance to abiotic stress and affects laticifer differentiation
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Retno Lestari Maryannick Rio Florence Martin Julie Leclercq Natthakorn Woraathasin Sandrine Roques Florence Dessailly Anne Clément‐Vidal Christine Sanier Denis Fabre Sémi Melliti Sony Suharsono Pascal Montoro 《Plant biotechnology journal》2018,16(1):322-336
Ethylene response factor 1 (ERF1) is an essential integrator of the jasmonate and ethylene signalling pathways coordinating a large number of genes involved in plant defences. Its orthologue in Hevea brasiliensis, HbERF‐IXc5, has been assumed to play a major role in laticifer metabolism and tolerance to harvesting stress for better latex production. This study sets out to establish and characterize rubber transgenic lines overexpressing HbERF‐IXc5. Overexpression of HbERF‐IXc5 dramatically enhanced plant growth and enabled plants to maintain some ecophysiological parameters in response to abiotic stress such as water deficit, cold and salt treatments. This study revealed that HbERF‐IXc5 has rubber‐specific functions compared to Arabidopsis ERF1 as transgenic plants overexpressing HbERF‐IXc5 accumulated more starch and differentiated more latex cells at the histological level. The role of HbERF‐IXc5 in driving the expression of some target genes involved in laticifer differentiation is discussed. 相似文献
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Increasing numbers of investigations indicate that ethylene response factor (ERF) proteins play important roles in plant stress
responses via interacting with GCC box and/dehydration-responsive element/C-repeat to modulate expression of downstream genes,
but the detailed regulatory mechanism is not well elucidated. Revealing the modulation pathway of ERF proteins in response
to stresses is vital. Previously, we showed that tomato ERF protein TERF2/LeERF2 is ethylene inducible, and ethylene production
is suppressed in antisense TERF2/LeERF2 tomatoes, suggesting that TERF2/LeERF2 functions as a positive regulator in ethylene biosynthesis. In this paper, we report
that regulation of TERF2/LeERF2 in ethylene biosynthesis is associated with enhanced freezing tolerance of tobacco and tomato.
Analysis of gene expression showed that cold slowly induces expression of TERF2/LeERF2 in tomato, implying that TERF2/LeERF2 may be involved in cold response through ethylene modulation. To test the hypothesis,
we first observed that overexpressing TERF2/LeERF2 tobaccos not only enhances freezing tolerance via activating expression of cold-related genes, but also significantly reduces
electrolyte leakage. In addition, with treatment of ethylene biosynthesis inhibitor or ethylene receptor antagonist, we then
showed that blockage of ethylene biosynthesis or the ethylene signaling pathway decreases freezing tolerance of overexpressing
TERF2/LeERF2 tobaccos. Moreover, the results from tomatoes showed that overexpressing TERF2/LeERF2 tomatoes enhances while antisense TERF2/LeERF2 transgenic lines decreases freezing tolerance, and application of ethylene precursor 1-aminocyclopropane-1-carboxylic acid
restored freezing tolerance of antisense lines. Therefore our results establish that TERF2/LeERF2 enhances freezing tolerance
of plants through ethylene biosynthesis and the ethylene signaling pathway. 相似文献
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Dehydrins are highly hydrophilic proteins involved in playing key adaptive roles in response to abiotic stress conditions having dehydration as a common component. In the present study, a novel banana SK(3)-type dehydrin, MusaDHN-1, was identified and later characterized using transgenic banana plants to investigate its functions in abiotic stress tolerance. Expression profiling in native banana plants demonstrated that MusaDHN-1 was induced in leaves by drought, salinity, cold, oxidative and heavy metal stress as well as by treatment with signalling molecules like abscisic acid, ethylene and methyl jasmonate. Promoter analysis carried out by making a MusaDHN-1 promoter: β-glucuronidase fusion construct reconfirmed the abiotic stress inducibility of MusaDHN-1. Transgenic banana plants constitutively overexpressing MusaDHN-1 were phenotypically normal and displayed improved tolerance to drought and salt-stress treatments in both in vitro and ex vitro assays. Enhanced accumulation of proline and reduced malondialdehyde levels in drought and salt-stressed MusaDHN-1 overexpressing plants further established their superior performance in stressed conditions. This study is the first to report generation of transgenic banana plants engineered for improved drought and salt-stress tolerance. 相似文献
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