例如:"lncRNA", "apoptosis", "WRKY"

WRKY40 and WRKY6 act downstream of the green leaf volatile E-2-hexenal in Arabidopsis.

Plant J.2015 Sep;83(6):1082-96. doi:10.1111/tpj.12953
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摘要


Plants are known to be responsive to volatiles, but knowledge about the molecular players involved in transducing their perception remains scarce. We study the response of Arabidopsis thaliana to E-2-hexenal, one of the green leaf volatiles (GLV) that is produced upon wounding, herbivory or infection with pathogens. We have taken a transcriptomics approach to identify genes that are induced by E-2-hexenal, but not by defence hormones or other GLVs. Furthermore, by studying the promoters of early E-2-hexenal-induced genes we determined that the only statistically enriched cis-element was the W-box motif. Since members of the plant-specific family of WRKY transcription factors act in trans on this cis-element, we focused on WRKY6, 40 and 53 that were most strongly induced by E-2-hexenal. Root elongation of Arabidopsis seedlings of the wrky40 wrky6 double mutant was much less inhibited than in wt plants, similar to the E-2-hexenal-responsive mutant her1, which is perturbed in γ-amino butyric acid (GABA) metabolism. The induction of several of the E-2-hexenal-specific genes was much higher in the wrky40, wrky6 or wrky40 wrky6 mutants, including GAD4, a glutamate decarboxylase that catalyzes the formation of GABA from glutamate. In conclusion, WRKY6 and 40 seem to act as important players transducing E-2-hexenal perception.

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