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Arabidopsis HsfA1 transcription factors function as the main positive regulators in heat shock-responsive gene expression 总被引:1,自引:0,他引:1
Yoshida T Ohama N Nakajima J Kidokoro S Mizoi J Nakashima K Maruyama K Kim JM Seki M Todaka D Osakabe Y Sakuma Y Schöffl F Shinozaki K Yamaguchi-Shinozaki K 《Molecular genetics and genomics : MGG》2011,286(5-6):321-332
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Qiming Wang Xiaoju Tu Jihong Zhang Xinbo Chen Liqun Rao 《Molecular biology reports》2013,40(3):2679-2688
There is increasing evidence for considerable interlinking between the responses to heat stress (HS) and light signaling. In the present work, we provide molecular evidence that BBX18, a negative regulator in photomorphogenesis belonging to the B-box zinc finger protein family in Arabidopsis thaliana, is involved in the regulation of thermotolerance. Using quantitative RT-PCR, GUS staining and immunoblot analysis, our results indicate that the expression of BBX18 was induced by HS. BBX18-RNAi and 35S::BBX18 transgenic Arabidopsis plants were obtained for functional analysis of BBX18. Under-expression of BBX18 displayed increased both basal and acquired thermotolerance in the transgenic plants, while over-expression of BBX18 reduced tolerance to HS in transgenic lines. Moreover, when wild-type, BBX18-RNAi and 35S::BBX18 transgenic plants were treated with HS, HR-related digalactosyldiacylglycerol synthase 1 (DGD1) was down-regulated by BBX18 in both normal and heat shock conditions. Besides, the expression levels of Hsp70, Hsp101 and APX2 were increased in BBX18-RNAi transgenic plants, but lower in 35S::BBX18 transgenic plants. However, the expression of HsfA2 was lower in BBX18-RNAi transgenic plants and higher in the 35S::BBX18 after high-temperature treatment. These results suggesting that, by modulated expression of a set of HS-responsive genes, BBX18 weakened tolerance to HS in Arabidopsis. So our data indicate that BBX18 plays a negative role in thermotolerance. 相似文献
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A cascade of transcription factor DREB2A and heat stress transcription factor HsfA3 regulates the heat stress response of Arabidopsis 总被引:5,自引:0,他引:5
Schramm F Larkindale J Kiehlmann E Ganguli A Englich G Vierling E von Koskull-Döring P 《The Plant journal : for cell and molecular biology》2008,53(2):264-274
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