The Arabidopsis Jasmonate ZIM-domain proteins （JAZs） act as substrates of SCF complex to repress their downstream targets, which are essential for JA-regulated plant development and defense. The bHLH transcription f...The Arabidopsis Jasmonate ZIM-domain proteins （JAZs） act as substrates of SCF complex to repress their downstream targets, which are essential for JA-regulated plant development and defense. The bHLH transcription factor MYC2 was found to interact with JAZs and mediate JA responses including JA-inhibitory root growth. Here, we identified another bHLH transcription factor MYC3 which directly interacted with JAZs by virtue of its N-terminal region to regulate JA responses. The transgenic plants with overexpression of MYC3 exhibited hypersensitivity in JA-inhibitory root elon- gation and seedling development. The JAZ-interacting pattern and the JA-induced expression pattern of MYC3 were distinguishable from those of MYC2. We speculate that MYC3 and MYC2 may have redundant but also distinguishable functions in regulation of JA responses.展开更多
Dear Editor,In plants, the floral transition is flexibly controlled by various environmental conditions and endogenous developmental cues. In Arabidopsis, six major flowering pathways respond to changes in these facto...Dear Editor,In plants, the floral transition is flexibly controlled by various environmental conditions and endogenous developmental cues. In Arabidopsis, six major flowering pathways respond to changes in these factors （Fornara et al., 2010）. The photoperiod, vernalization, and ambient pathways monitor exogenous signals from the environment such as day length, minimum winter temperature, and ambient temperature （Fornara et al., 2010）. By contrast, the autonomous, gibberellin, and age pathways respond to endogenous cues linked to developmental status （Fornara et al., 2010）. Accumulating evidence indicates that the six flowering pathways converge in a network to regulate floral integrator genes FLOWERING LOCUS T （FT）, TWIN SISTER OF FT （TSF）, and SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1 （Fornara et al., 2010）.展开更多
文摘The Arabidopsis Jasmonate ZIM-domain proteins （JAZs） act as substrates of SCF complex to repress their downstream targets, which are essential for JA-regulated plant development and defense. The bHLH transcription factor MYC2 was found to interact with JAZs and mediate JA responses including JA-inhibitory root growth. Here, we identified another bHLH transcription factor MYC3 which directly interacted with JAZs by virtue of its N-terminal region to regulate JA responses. The transgenic plants with overexpression of MYC3 exhibited hypersensitivity in JA-inhibitory root elon- gation and seedling development. The JAZ-interacting pattern and the JA-induced expression pattern of MYC3 were distinguishable from those of MYC2. We speculate that MYC3 and MYC2 may have redundant but also distinguishable functions in regulation of JA responses.
文摘Dear Editor,In plants, the floral transition is flexibly controlled by various environmental conditions and endogenous developmental cues. In Arabidopsis, six major flowering pathways respond to changes in these factors （Fornara et al., 2010）. The photoperiod, vernalization, and ambient pathways monitor exogenous signals from the environment such as day length, minimum winter temperature, and ambient temperature （Fornara et al., 2010）. By contrast, the autonomous, gibberellin, and age pathways respond to endogenous cues linked to developmental status （Fornara et al., 2010）. Accumulating evidence indicates that the six flowering pathways converge in a network to regulate floral integrator genes FLOWERING LOCUS T （FT）, TWIN SISTER OF FT （TSF）, and SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1 （Fornara et al., 2010）.
