水稻OsPR10A的表达特征及其在干旱胁迫应答过程中的功能  

Expression Characterization of Rice OsPR10A and Its Function in Response to Drought Stress

作　　者：张彤 郭亚璐[1,2] 陈悦 马金姣 兰金苹 燕高伟[1] 刘玉晴 徐珊 李莉云 刘国振 窦世娟[1] Zhang Tong;Guo Yalu;Chen Yue;Ma Jinjiao;Lan Jinping;Yan Gaowei;Liu Yuqing;Xu Shan;Li Liyun;Liu Guozhen;Dou Shijuan(College of Life Sciences,Hebei Agricultural University,Baoding 071001,China;Agricultural Genomics Institute at Shenzhen,Chinese Academy of Agricultural Sciences,Shenzhen 518116,China;Research Center for Life Sciences,Hebei North University,Zhangjiakou 075000,China)

机构地区：[1]河北农业大学生命科学学院,保定071001 [2]中国农业科学院农业基因组研究所,深圳518116 [3]河北北方学院生命科学研究中心,张家口075000

出　　处：《植物学报》2019年第6期711-722,共12页Chinese Bulletin of Botany

基　　金：国家自然科学基金(No.31400700)

摘　　要：利用免疫印迹(WB)分析了水稻(Oryzasativa)OsPR10A在其不同生长时期、不同组织部位及多种非生物逆境胁迫下的表达特征,发现OsPR10A在干旱、盐胁迫以及茉莉酸甲酯(MeJA)和脱落酸(ABA)诱导下表达量明显升高,表明该蛋白可能在干旱和盐胁迫应答过程中发挥作用。为证明这一推测,我们构建了OsPR10A超表达载体,经农杆菌介导转化水稻,获得超表达OsPR10A的纯合株系。田间表型观察表明,转基因株系株高变矮、穗长变短、结实率降低。用20%PEG6000在水稻种子萌发过程中进行干旱处理,结果显示,OsPR10A超表达株系的根长和芽长均显著高于野生型,证明超表达OsPR10A可增强水稻萌发期耐旱性。该研究有助于增进人们对水稻OsPR10A功能的了解。In this study, we surveyed the expression patterns of rice OsPR10A protein by using western blot analysis for protein samples extracted from different tissues at different developmental stages and a variety of abiotic stresses. The expression of OsPR10A was upregulated significantly under drought, salt stress and hormone treatments such as methyl jasmonate and abscisic acid, which suggests that OsPR10A protein plays a role in drought and salt stress response. To test this hypothesis, we constructed a vector for overexpression of OsPR10A protein and obtained homozygous transgenic lines via Agrobacterium-mediated rice transformation. Phenotypic investigation in field experiments revealed shorter plant height and spike length as well as lower seed setting rate in transgenic lines than controls. At seed germination stage, drought stress treatment was applied by using 20% PEG6000. Root and shoot length was significantly longer in OsPR10A overexpression lines than the wild-type control, which supports that overexpression of OsPR10A protein enhanced the drought tolerance of rice during germination. The study increases our understanding of the function of rice OsPR10A protein.

关 键 词：水稻 干旱胁迫 病程相关蛋白 免疫印迹 基于抗体的蛋白质组学 

分 类 号：S511[农业科学—作物学]