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Effects of flooding stress in 'micro-tom' tomato plants transformed with different levels of mitochondrial shsp23.6/Efeitos do estresse por alagamento em plantas de tomateiro 'Micro-Tom' transformada com diferentes niveis de sHSP23.6 mitocondrial
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Effects of flooding stress in 'micro-tom' tomato plants transformed with different levels of mitochondrial shsp23.6/Efeitos do estresse por alagamento em plantas de tomateiro 'Micro-Tom' transformada com diferentes niveis de sHSP23.6 mitocondrial
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Effects of flooding stress in 'micro-tom' tomato plants transformed with different levels of mitochondrial shsp23.6/Efeitos do estresse por alagamento em plantas de tomateiro 'Micro-Tom' transformada com diferentes niveis de sHSP23.6 mitocondrial
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Journal Article
Effects of flooding stress in 'micro-tom' tomato plants transformed with different levels of mitochondrial shsp23.6/Efeitos do estresse por alagamento em plantas de tomateiro 'Micro-Tom' transformada com diferentes niveis de sHSP23.6 mitocondrial
2017
Overview
Soil flooding is an environmental stressor for crops that can affect physiological performance and reduce crop yields. Abiotic stressors cause changes in protein synthesis, modifying the levels of a series of proteins, especially the heat shock proteins (HSP), and these proteins can help protect the plants against abiotic stress. The objective of this study was to verify if tomato plants cv. Micro-Tom from different genotypes with varying expression levels of MT-sHSP23.6 (.mitochondrial small heat shock proteins) have different responses physiological to flooding. Plants from three genotypes (untransformed, MT-sHSP23.6 sense expression levels and MT-sHSP23.6 antisense expression levels) were cultivated under controlled conditions. After 50 days, the plants were flooded for 14 days. After this period half of the plants from each genotype were allowed to recover. Chlorophyll fluorescence, gas exchange, chlorophyll index, leaf area and dry matter were evaluated. Flood stress affected the photo synthetic electron transport chain, which is related to inactivation of the oxygen-evolving complex, loss of connectivity among units in photosystem II, oxidation-reduction of the plastoquinone pool and activity of photosystem I. The genotype with MT-sHSP23.6 sense expression levels was less sensitive to stress from flooding.
