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| Stydy on Enhancement of Heat Tolerance of Cucumber Seedlings by Ca~(2+) |
| Zhang Jiang 1; Liu Meiyan 2; Xiao Wei 1 |
| 1Department of Biology; Xuzhou Normal University; Xuzhou 221009; 2Xuzhou Agricultural School |
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Abstract The cucumber seedlings were treated at high temperature after being sprayed with Ca 2+ at the second true leaf. The results showed that Ca 2+ could retard the descent speed of chlorophyll content,chlorophyll a/b,phytosynthetic rate and quantum yield effectively,and inhibit the increasement of MDA content and electrolytic leakage. The Ca 2+ treatment also resulted in high activities of the enzymes which eliminate active oxygen in cucumber seedlings.
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Received: 07 January 2002
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