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您的检索式：作者名="Katja Poveda"
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| 1 | Tecia solanivora infestation increases tuber starch accumulation in Pastusa Suprema potatoes显示文摘In response to infestation with larvae of the Guatemalan tuber moth(Tecia solanivora), some Solanum tuberosum(potato) varieties exhibit an overcompensation response, whereby the total dry mass of uninfested tubers is increased. Here, we describe early responses,within the first few days, of T. solanivora feeding, in the Colombian potato variety Pastusa Suprema. Nontargeted metabolite profiling showed significant secondary metabolism changes in T. solanivora-infested tubers,but not in uninfested systemic tubers. In contrast,changes in primary metabolism were greater in uninfested systemic tubers than in the infested tubers, with a notable 80% decline in systemic tuber sucrose levels within 1 d of T. solanivora infestation. This suggested either decreased sucrose transport from the leaves orincreased sink strength, i.e., more rapid sucrose to starch conversion in the tubers. Increased sucrose synthesis was indicated by higher rubisco activase and lower starch synthase gene expression in the leaves of infested plants.Elevated sink strength was demonstrated by 45% more total starch deposition in systemic tubers of T. solanivorainfested plants compared to uninfested control plants.Thus, rather than investing in increased defense of uninfested tubers, Pastusa Suprema promotes deposition of photoassimilates in the form of starch as a response to T. solanivora infestation. | Pavan Kumar Etzel Garrido Kun Zhao Yi Zheng Saleh Alseekh Erandi Vargas-Ortiz Alisdair R.Fernie Zhangjun Fei Katja Poveda Georg Jander | 2018 | Journal of Integrative Plant Biology2018，60，11： | 0 |
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