Recognizing Plant Physiology authors: Tianli Tu

Tianli Tu, co-first author of Coordinated Cytokinin Signaling and Auxin Biosynthesis Mediates Arsenate-induced Root Growth Inhibition

Current Position: Ph.D student in State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, China

Education: MSc in Developmental Biology, State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, China

Non-scientific Interests: reading, swimming

Brief Bio: In 2017, I joined the group of Prof. Chuanyou Li at Shandong Agricultural University as a Ph.D student. I majorly worked in the study of mechanism of Arabidopsis thaliana root tolerance to arsenic. Here, we found that arsenic upregulates the local auxin biosynthesis in the root tip by upregulating the expression of ASA1 and ASB1; further investigation confirmed that arsenic activates cytokinin signaling by stabilizing the ARR1 protein, which directly promotes the transcription of ASA1 and ASB1 genes by binding to their promoters. Our results indicate that arsenic-induced root growth inhibition via crosstalk between auxin and cytokinin.

 

文章：Coordinated Cytokinin Signaling and Auxin Biosynthesis Mediates Arsenate-induced Root Growth Inhibition

姓名：涂田莉

现在职位：山东农业大学作物学博士在读

教育经历：山东农业大学，理学硕士，发育生物学方向

兴趣爱好：读小说，游泳

个人简介：我于2017年进入山东农业大学农学院李传友教授课题组攻读博士学位，主要从事拟南芥根系耐重金属砷的机理研究。在研究中，我们发现砷酸盐通过上调拟南芥根尖中ASA1和ASB1的表达来上调根尖局部生长素生物合成；进一步的研究证实，砷酸盐通过稳定ARR1蛋白来激活细胞分裂素信号传导，上游的ARR1通过与启动子结合直接促进ASA1和ASB1的转录。我们的结果说明砷酸盐诱导的拟南芥根部生长抑制是通过生长素和细胞分裂素之间相互作用来实现的。