| Effects of sub-low temperature and drought stress on osmotic substances and activities of antioxidant enzymes in tomato seedling |
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| DOI：10.7606/j.issn.1000-7601.2012.03.27 |
| Key Words: tomalo sub-low temperature drought stress osmotic substances activities of antioxidant enzymes |
| Author Name | Affiliation | | SUN Sanjie | College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China | | LI Jianming | College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China | | YAO Yongzhe | College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China | | CHEN Kaili | College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| With potted tomato plants in greenhouse as the experiment material, we investigated the influence of sub-low temperature and drought stress on osmotic substances and activities of antioxidant enzymes in tomato seedling.The results showed that with the interaction of sub-low temperature and drought stress treatment time prolong, MDA content、rel-ative membrane conductivity in leaves of tomato seedling increased, soluble protein content and SOD activities first in-creased and then decreased gradually with the prolong of treatment time. The change of POD activities showed inverted “V”pattern and POD activities showed“M”pattern, Tomato seedling of sub-low temperature is greater sensitivity than drought stress. The correlation analysis and Principal component analysis indicated that POD、CAT was significantly posi-tively negatively correlated to relative membrane conductivity, positively negatively correlated to MDA content; SOD was related to MDA, POD and CAT was significantly positively related. |
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