报告题目：An emerging integrated model for controlling longevity of leaves and fruits

报告人：甘苏生 教授，美国康奈尔大学

主持人：许玲   教授
报告时间：4月8日 13:30
报告地点：闵行生科院534报告厅

报告人简介：甘苏生教授，1982年毕业于bevictor伟德官网生物系，获理科学士学位；1985年获bevictor伟德官网植物生理硕士学位；1995年获美国威斯康辛大学麦迪逊分校生物化学博士学位。1997～2002年曾在美国肯塔基大学从事教学和研究工作，2002年至今任教于康奈尔大学，现任康奈尔大学终身教授。2010.1～2014.12 受聘为我校bevictor伟德官网紫江讲座教授。甘教授是国际著名的植物衰老机制研究专家，主要研究领域为植物叶片黄化和衰老过程中的分子调节机制。他的研究在延缓植株过早衰老和农作物采后贮存时间等方面有着广泛的应用前景。近年来甘教授的研究取得了丰硕的成果，迄今已在Science、Nature Biotechnology、 Plant Cell 、PNAS等生物学领域的国际顶级杂志发表高质量的学术论文70余篇，并获得多项专利。他是《Senescence Processes in Plants》一书（年度植物学综述）的主编，并被加拿大科学院评为2011年度植物科学领域论文被引用率处于世界前1%的作者之一。

报告摘要：Leaf/fruit senescence is a genetically fine-tuned program that involves thousands of genes encoding, for examples, various transcription factors and components of signal transduction pathways. The cell attrition and nutrient recycling processes can be induced and regulated by various environmental cues and endogenous plant hormones [1]. We have identified a NAC transcription factor gene named AtNAP that plays a key role in leaf senescence. Knocking-out and inducible gain-of-function render significantly delayed or precocious leaf senescence, respectively [2]. This is achieved by activating its target genes, including (i) SAG113 protein phosphatase 2C gene that mediates abscisic acid or ABA’s unusual role in preventing stomatal closure at the onset of and during leaf senescence [3,4]; (ii) SAG202 transcrition factor gene that is involved in biosynthesis of salicylic acid (SA), which in turn activates an SA 3-hydroxylase gene to prevent overaccumulation of SA [5]; and (iii) SAG203 that is to inactivate the senescence-inhibition hormone cytokinins. The AtNAP-based regulatory network involving phosphorelay and plant hormones ABA, SA and cytokinins will be presented.

1. Gan S-S (2010) The hormonal regulation of senescence. In: Davies PJ, editor. Plant Hormones: Biosynthesis, Signal Transduction, Action! Revised 3rd Edition ed. New York: Springer. pp. 597-617.

2. Guo Y, Gan S-S (2006) AtNAP, a NAC family transcription factor, has an important role in leaf senescence. Plant J 46: 601-612.

3. Zhang K, Gan S-S (2012) An abscisic acid-AtNAP transcription factor-SAG113 protein phosphatase 2C regulatory chain for controlling dehydration in senescing Arabidopsis leaves. Plant Physiol 158: 961–969.

4. Zhang K, Xia X, Zhang Y, Gan S-S (2012) An ABA-regulated and Golgi-localized protein phosphatase controls water loss during leaf senescence in Arabidopsis. Plant J 69: 667-678.

5. Zhang K, Halitschke R, Yin C, Liu C-J, Gan S-S (2013) Salicylic acid 3-hydroxylase regulates Arabidopsis leaf longevity by mediating salicylic acid catabolism. Proc Natl Acad Sci USA 110 14807–14812.