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| 不同钙盐对温州蜜柑抗冻性的影响 | |
| 引用本文： | LI Xin-guo,ZENG Bin,曾斌,HE Li-gang,何利刚,SUN Zhong-hai,孙中海. 不同钙盐对温州蜜柑抗冻性的影响[J]. 应用生态学报, 2008, 19(8): 1665-1669 |
| 作者姓名： | LI Xin-guo ZENG Bin 曾斌 HE Li-gang 何利刚 SUN Zhong-hai 孙中海 |
| 作者单位： | 1. 华中农业大学国家柑橘育种中心,武汉,430070 2. 华中农业大学国家柑橘育种中心,武汉,430070;湖北省农业科学院果树茶叶研究所,武汉,430209 |
| 基金项目： | 国家自然科学基金资助项目 |
| 摘 要： | 用20 mmol·L-1氯化钙（CaCl2）、醋酸钙（CaAc2）和硝酸钙（Ca(NO3)2）喷施“国庆1号”温州蜜柑叶片，研究3种钙盐对其叶片抗冻性的影响.结果表明：喷施钙盐降低了叶片半致死温度（LT50），提高了温州蜜柑的抗冻性，CaCl2处理的LT50比对照降低了0.54 ℃，而CaAc2和Ca(NO3)2处理分别比对照降低了1.34 ℃和1.35 ℃，表明CaCl2处理效果较差，CaAc2和Ca(NO3)2处理效果较好.钙盐处理还提高了“国庆1号”温州蜜柑叶片在低温（-9 ℃）胁迫下的SOD、POD活性及可溶性蛋白质、可溶性糖和脯氨酸含量，减少了叶片MDA的积累. |
| 关 键 词： | 钙盐 低温胁迫 温州蜜柑 LT50 生理指标 |
| 收稿时间： | 2007-12-16 |
Effects of different calcium salts on freezing resistance of satsuma mandarin. |
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| Affiliation: | National Center for Citrus Breeding, Huazhong Agricultural Universit y, Wuhan 430070, China；College of Horticulture and Landscape Architect ure, Hainan University, Danzhou 571737, Hainan, China;Institute of Fruit and Tea, Hubei Academy of Agricultural Sciences, Wuhan 430209, China |
| Abstract: | The study on the effects of foliar spraying 20 mmol·L-1 of CaCl2, Ca(NO3)2 and CaAc2 on the freezing resistance of satsuma mandarin (Citrus unshiu Marc. cv. Guoqing No.1) showed that after treated with these Ca salts, the leaves of test plant had a lower half lethal temperature (LT50) than the control (sprayed with distilled water). The LT50 after treated with CaCl2 was 0.54 ℃ lower, whereas that after treated with CaAc2 and Ca(NO3)2 was 1.34 ℃ and 1.35 ℃ lower, respectively, implying that the latter two Ca salts were more effective in enhancing the freezing resistance of satsuma mandarin. Moreover, foliar spraying Ca salts increased the superoxidase (SOD) and peroxidase (POD) activities and the contents of soluble proteins, soluble sugars and praline in leaves, and decreased the leaf MDA content. |
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