Response of different organs in tomato hybrid seedlings to solid matrix priming under NaCl stress
Priming can improve seed vigor under stress conditions as a seed sowing treatment technique. This study investigated the responses of different organs of two tomato (Lycopersicon esculentum M.) hybrid seed-lings ('Red cooperation 909' and 'Pink cooperation 906') to solid matrix priming under salt stress. The seeds of two tomato varieties were primed with solid matrix for 5 d at 15°C in the dark. Physiological indexes of un-priming and priming varieties were measured at (25±1)°C for 10 d under 0, 100 mmol·L-1 NaCl solution respec-tively. Results showed that dry and fresh weights of stem and root were significantly increased, while content of MDA was decreased compared with seedlings without priming. Furthermore, the increase in the content of pro-line, chlorophyll and the activity of antioxidant enzymes and more osmotic substances accumulation were de-tected during the seedling growth period with priming under salt stress. It was found that Chlb was stable than Chla, carotenoid was stable than Chl (a+b). The results suggested that solid matrix priming could improve salt tolerance ability of tomato seedlings by increasing the activities of antioxidant enzymes, promoting osmotic substances synthesis in different organs, thereby decreasing membrane permeability and lipid peroxidation to protect the stability of cell membrane structure and photosynthetic apparatus.
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万方数据
维普
