中关村NMT联盟全国测试服务网络测试服务信息

4月8日,某研究所将NMT技术应用于钙信号研究,测试样品为小麦,测试指标为Ca2+,在旭月研究院完成实验。| 5月9号,某研究院将NMT技术应用于逆境生理领域,测试样品为黄瓜幼苗,测试指标为NO3-、NH4+,在旭月研究院完成实验。| 6月2号,某研究院将NMT技术应用于逆境胁迫领域,测试样品为棉花苗,测试指标为Ca2+、H+、K+、Na+、IAA,在旭月研究院完成实验。| 6月5号,某研究院将NMT技术应用于植物逆境领域,测试样品为苜蓿,测试指标为K+,在旭月研究院完成实验。| 6月9号,某研究所将NMT技术应用于水稻逆境领域,测试样品为水稻,测试指标为Na+、Ca2+,在中国科学院植物研究所完成实验。| 6月11号,某研究院将NMT技术应用于植物抗逆领域,测试样品为酵母细胞,测试指标为IAA,在旭月研究院完成实验。| 6月16号,某高校将NMT技术应用于昆虫研究,测试样品为昆虫,测试指标为Ca2+、K+,在旭月研究院完成实验。| 6月19号,某研究院将NMT技术应用于植物抗逆领域,测试样品为拟南芥,测试指标为Ca2+,在旭月研究院完成实验。|

李积胜等《Molecular Plant》2020年


(转自西北农林大学生命科学学院)

原文链接:https://sm.nwsuaf.edu.cn/kxyj/kydt/6f94d406117c4062a1901621fbd51600.htm

论文题目:Hydrogen Sulfide Positively Regulates Abscisic Acid Signaling through Persulfidation of SnRK2.6 in Guard Cells

论文作者:Chen S, Jia H, Wang X, Shi C, Wang X, Ma P, Wang J, Ren M, Li J

论文摘要:The phytohormone abscisic acid (ABA) plays pivotal roles in triggering stomatal closure and facilitating adaptation of plants to drought stress. Hydrogen Sulfide (H2S), a small signaling gas molecule, is involved in ABA-dependent stomatal closure. However, how H2S regulates ABA signaling remains largely unclear. Here, we show that ABA induces the production of H2S catalyzed by L-CYSTEINE DESULFHYDRASE1 (DES1) in guard cells and H2S in turn positively regulates ABA signaling through persulfidation of Open Stomata 1 (OST1)/SNF1-RELATED PROTEIN KINASE2.6 (SnRK2.6). Two cysteine (Cys) sites, Cys131 and Cys137 that are exposed on the surface of SnRK2.6 and closed to the activation loop, were identified to be persulfidated, which promotes the activity of SnRK2.6 and its interaction with ABA response element-binding factor2 (ABF2), a transcription factor downstream of ABA signaling. When Cys131, Cys137 or both in SnRK2.6 was substituted with Serine (S), H2S-induced SnRK2.6 activity and SnRK2.6-ABF2 interaction were partially (SnRK2.6C131S and SnRK2.6C137S) or completely (SnRK2.6C131SC137S) comprised. Introduction of SnRK2.6C131S, SnRK2.6C137S, or SnRK2.6C131SC137S into ost1-3 mutant could not rescue the mutant phenotype, showing less sensitive to ABA- and H2S-induced stomatal closure and Ca2+ influx as well as increased water loss and decreased drought tolerance. Taken together, our study reveals a novel post-translational regulatory mechanism of ABA signaling in which H2S persulfidates SnRK2.6 to promote ABA signaling and ABA-induced stomatal closure.

论文链接:https://www.cell.com/molecular-plant/fulltext/S1674-2052(20)30004-6