时间：4月16日下午16：00-17：00

　　地点：植物园二号会议室

　　报告人：Lailiang Cheng

　　报告题目：Carbon metabolism in transgenic apple trees with decreased sorbitol synthesis

　　邀请人：李绍华研究员

　　报告人简介：

　　Lailiang Cheng is an associate professor in fruit crop physiology in the Department of Horticulture at Cornell University. He received his Ph.D at Oregon State University in 2009 and joined the faculty at Cornell in 2000. He has published over 50 refereed papers on nutrition physiology of apples and grapes in journals including Journal of Experimental Botany, Planta, Plant and Cell Physiology, Functional Plant Biology, and Plant Physiology. Currently, his research is focused on understanding the role sorbitol plays in regulation of photosynthesis, carbon partitioning, carbon export, and stress tolerance, and physiological mechanisms whereby apple and grapevines deal with nutrient and high light stresses. In addition, his lab is using metabolite profiling to understand 1) the regulatory mechanisms of the integrated nitrogen, carbohydrate, and organic acid metabolism in apples and grapes in response to nutrient supply and other environmental factors; and 2) fruit quality development in relation to primary and secondary metabolism and metabolite composition.　

　　发表的主要文章：

• Cheng, L. and R. Raba. 2009. Accumulation of macro- and micronutrients and nitrogen demand-supply relationship of `Gala`/M.26 trees grown in sand culture. Journal of American Society for Horticultural Science 134(1): 3-13.
• Reidel, E. J., E. Rennie, V. Amiard, L. Cheng, and R. Turgeon. 2009. Phloem loading strategies in three plant species that transport sugar alcohols. Plant Physiology 10.1104/pp.108.134791.
• Xia, G., L. Cheng, A. N. Lakso, and M. Goffinet. 2009. Effects of nitrogen supply on source-sink balance and fruit size of `Gala` apple trees. Journal of American Society for Horticultural Science 134(1): 126-133.
• Chen, L. S., P. Li and L. Cheng. 2008. Effects of high temperature coupled with high light on the balance between photooxidation and photoprotection in the sun-exposed peel of apple. Planta 228: 745-756.
• Li, P. and L. Cheng. 2008. The shaded side of apple fruit becomes more sensitive to photoinhibition with fruit development. Physiologia Plantarum 134: 282-292.
• Li, P., S. Castagnoli and L. Cheng. 2008. Red `Anjou` pear has a higher photoprotective capacity than green `Anjou`. Physiologia Plantarum 134: 486-498.
• Reidel, E. J., R. Turgeon and L. Cheng. 2008. A maltose transporter from apple is expressed in source and sink tissues and complements the Arabidopsis maltose export-defective mutant. Plant and Cell Physiology 49: 1607-1613.
• Zhou, R. and L. Cheng. 2008. Competitive inhibition of phosphoglucose isomerase of apple leaves by sorbitol 6-phosphate. Journal of Plant Physiology 165: 903-910.
• Chen, L. S. and L. Cheng. 2007. The sun-exposed peel of apple fruit has a higher photosynthetic capacity than the shaded peel. Functional Plant Biology 34, 1038-1048.
• Smith, B. R. and L. Cheng. 2007 Iron Assimilation and Carbon Metabolism in `Concord` Grapevines Grown at Different pHs. Journal of American Society for Horticultural Science. 132: 473-483.
• Zhou, R., L. Cheng, and A. M. Dandekar. 2006. Down-regulation of sorbitol dehydrogenase and up-regulation of sucrose synthase in shoot tips of transgenic apple trees with decreased sorbitol synthesis. Journal of  Experimental Botany 57: 3647-3657.
• Cheng, L., R. Zhou, E. J. Reidel, T. D. Sharkey, and A. M. Dandekar. 2005. Antisense inhibition of sorbitol synthesis leads to up-regulation of starch synthesis without altering CO2 assimilation in apple leaves. Planta 220: 767-776.
• Smith, B. and L. Cheng. 2005. Photoprotective mechanisms of grape leaves (Vitis labrusca L. cv. Concord) in relation to iron supply. Journal of American Society for Horticultural Science. 130: 331-340.
• Zhou, R. and L. Cheng. 2005. Binding of 3-phosphoglycerate not only activates but also stabilizes ADP-glucose pyrophosphorylase of apple leaves. Functional Plant Biology. 32: 839-848.
• Zhou, R. and L. Cheng. 2004. Biochemical characterization of cytosolic fructose-1,6-bisphosphatase from apple leaves. Plant and Cell Physiology 45: 879-886.
• Chen, L. S. and L. Cheng. 2004. CO2 assimilation, carbohydrate metabolism, xanthophyll cycle and the antioxidant system of `Honeycrisp` apple leaves with zonal chlorosis. Journal of American Society for Horticultural Science 129: 729-737.
• Cheng, L. and F. Ma. 2004. Diurnal operation of the xanthophyll cycle and the antioxidant system in the peel of apple fruit. Journal of American Society for Horticultural Science 129: 313-320.
• Cheng, L., G. Xia and T. Bates. 2004b. Growth and fruiting of young `Concord` grapevines in relation to reserve nitrogen and carbohydrates. Journal of American Society for Horticultural Science 129: 660-666.
• Chen, L. S. and L. Cheng. 2003. Both xanthophyll cycle-dependent thermal dissipation and the antioxidant system are up-regulated in grape (Vitis labrusca L.) leaves in response to N limitation. Journal of Experimental Botany 54: 2165-2175.
• Ma, F. and L. Cheng. 2003. The exposed peel of apple fruit has higher xanthophyll cycle-dependent thermal dissipation and antioxidants of the ascorbate-glutathione pathway than the shaded peel. Plant Science 165: 819-827.
• Cheng, L. 2003. Xanthophyll cycle pool size and composition in relation to nitrogen content of apple leaves. Journal of Experimental Botany 54:385-393.