Yi Zhang: The Plant Cell First Author
Yi Zhang, co-first author of “The circadian-controlled PIF8-BBX28 module regulates petal senescence in rose flowers by governing mitochondrial ROS homeostasis at night”
Current Position:
Postdoctoral research in the joint project, FAFU-UCR Joint Centre, Haixia Institute of Science and Technology. Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
The Waksman Institute of Microbiology, Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA
Education: Ph.D., Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, China
Non-scientific Interests:
I love travelling with my family. I enjoy swimming; that make me feel relaxed.
Brief bio:
Since I was young, with the guidance of my grandfather, I have developed a strong interest in science. In the China Agricultural University where I start my scientific training mentored by Prof. Junping Gao and Prof. Nan Ma, we found that H2O2 levels in rose (Rosa hybrida) petals follow a circadian rhythm and peak at night, which is consistent with the pattern of respiration rate in petals. The circadian-dependent RhPIF8-RhBBX28 module plays critical roles in H2O2 homeostasis in petals and consequent petal senescence. Additionally, we demonstrated that RhBBX28 directly repressed RhSDH1 expression, and thus the TCA cycle, to an appropriate level to avoid excessive mitochondrial ROS production in rose petals. Thus, our results indicate that the circadian-controlled RhPIF8-RhBBX28 module is a critical player that controls flower senescence by governing mitochondrial ROS homeostasis in rose. Our research provides a better understanding of the regulatory mechanism of ROS homeostasis in non-photosynthetic organs.
姓名：张翼
目前职位：
福建农林大学海峡联合研究院与罗格斯大学瓦克斯曼研究所，博士后（联合项目）
教育背景：
2012/09-2018/07 中国农业大学，园艺学院，硕、博
兴趣爱好：旅行，游泳
个人简介：
我在拥有“教育之乡”美誉的港口城市南通长大，从小在爷爷的引导下对自然科学产生了浓厚的兴趣。2012年9月，我有幸加入中国农业大学观赏园艺系，在高俊平教授与马男教授的合作指导下进行花瓣衰老机制研究。我们发现月季花瓣中H2O2水平与呼吸速率受昼夜节律调控，表现出一致的变化趋势，并在夜晚时达到峰值。进一步研究发现月季花瓣体内H2O2水平受昼夜节律依赖的RhPIF8-RhBBX28模块调控。此外，我们证实RhBBX28直接抑制线粒体呼吸电子传递链复合体II核心成员RhSDH1表达，从而限制月季花瓣线粒体中ROS的过量产生（过量的ROS促进花瓣衰老）。综上，我们的结果表明昼夜节律依赖的RhPIF8-RhBBX28模块通过调控花瓣体内ROS平衡影响花朵衰老进程。这一发现为理解非光合器官中ROS体内平衡的调控机制提供了新的线索。
