J Exp Bot:浙江大学甘银波课题组发表植物激素调控表皮细胞形成研
近日,国际植物学知名刊物《Journal of Experimental Botany》上在线发表了浙江大学农学院甘银波教授研究组题为“Multiple phytohormones promote root hair elongation by regulating a similar set of genes in the root epidermis in Arabidopsis.”的研究论文，本科生张汕为论文的第一作者，甘银波教授为通讯作者。
研究论文系统研究了植物激素包括生长素、乙烯和细胞分裂素协同调控拟南芥根毛形成的分子作用机理，提出了生长素、乙烯、细胞分裂素和RHD6通过调节相同的根毛特异性基因RSL4, EXP7，EXP18，RSH4， RHS10, RHS16促进根毛形成的分子作用模型，进一步补充和完善了植物激素通过锌指蛋白控制根毛和表皮毛细胞形成的作用机制，对于如何培育具有较高根系生理活性，特别是具有较多和较长根毛，提高植物根系吸收养分和水分的效率，提高作物产量，具有重要的理论意义和实际应用价值。
原文链接：
Multiple phytohormones promote root hair elongation by regulating a similar set of GENEs in the root epidermis in Arabidopsis
原文摘要：
Multiple phytohormones, including auxin, ethylene, and cytokinin, play vital roles in regulating cell development in the root epidermis. However, their interactions in specific root hair cell developmental stages are largely unexplored. To bridge this gap, we employed geneticand pharmacological approaches as well as transcriptional analysis inorder to dissect their distinct and overlapping roles in root hairinitiation and elongation in Arabidopsis thaliana. Our results show that among auxin, ethylene, and cytokinin, only ethylene induces ectopicroot hair cells in wild-type plants, implying a special role of ethylene inthe hair initiation stage. In the subsequent elongation stage, however,auxin, ethylene, and cytokinin enhance root hair tip growth equally. Our data also suggest that the effect of cytokinin is independent fromauxin and ethylene in this process. Exogenous cytokinin restores roothair elongation when the auxin and ethylene signal is defective, whereas auxin and ethylene also sustain elongation in the absence ofthe cytokinin signal. Notably, transcriptional analyses demonstrated thatauxin, ethylene, and cytokinin regulate a similar set of root hair-specific genes. Together these analyses provide important clues regarding the mechanism of hormonal interactions and regulation inthe formation of single-cell structures.
作者：甘银波
