Tecia solanivora infestation increases tuber starch accumulation in Pastusa Suprema potatoes
| Autor: | Pavan Kumar, Katja Poveda, Erandi Vargas-Ortiz, Kun Zhao, Etzel Garrido, Zhangjun Fei, Yi Zheng, Saleh Alseekh, Alisdair R. Fernie, Georg Jander |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Sucrose Starch Plant Science Moths Biology medicine.disease_cause Biochemistry General Biochemistry Genetics and Molecular Biology 03 medical and health sciences chemistry.chemical_compound Dry weight Gene Expression Regulation Plant parasitic diseases Infestation medicine Animals Solanum tuberosum fungi food and beverages Tecia solanivora Plants Genetically Modified Sucrose transport Horticulture 030104 developmental biology chemistry biology.protein Starch synthase |
| Zdroj: | Journal of Integrative Plant Biology. 60:1083-1096 |
| ISSN: | 1744-7909 1672-9072 |
| Popis: | 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. Non-targeted 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 or increased 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. solanivora-infested 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. |
| Databáze: | OpenAIRE |
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