| 王小媚,任惠,刘业强,苏伟强,唐文忠.低温胁迫下番木瓜幼苗对不同浓度氯化钙的生理响应[J].中国南方果树,2015,44(4): |
| 低温胁迫下番木瓜幼苗对不同浓度氯化钙的生理响应 |
| Study on the Effects of Calcium Chloride on Leaves Cold Resistance of Carica Papaya under Low Temperature |
| 投稿时间：2014-09-04 修订日期：2014-10-05 |
| DOI： |
| 中文关键词: 番木瓜 低温胁迫 氯化钙 抗寒性 |
| 英文关键词:carica papaya low temperature stress calcium chloride cold resistance |
| 基金项目:广西农业科学院基本科研业务专项基金项目（桂农科2013YQ16） |
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| 中文摘要: |
| 摘 要：研究低温胁迫下CaCl2对番木瓜幼苗抗寒性的影响，旨在筛选出最佳喷施CaCl2的浓度，提高番木瓜抗寒性，保证幼苗安全越冬提供理论依据和实践依据。以“台农2号”番木瓜幼苗为材料，分别用不同浓度的（100、200、300、400、500 mg /L）CaCl2喷洒番木瓜幼苗，4℃低温胁迫4天，每天测定其第3片功能叶的超氧化物歧化酶( SOD)活性、过氧化物歧化酶(POD)和丙二醛（MDA）含量变化。研究结果表明：施用外源CaCl2提高了幼苗叶片中SOD、POD酶活性且呈先上升后下降的变化趋势，降低了MDA含量的积累呈先下降后上升的变化趋势；在各个浓度处理中，使用300mg/L浓度的CaCl2处理的番木瓜叶片对提高番木瓜幼苗抗寒性效果最好，为最佳使用浓度。 |
| 英文摘要: |
| Abstract：Study on the effects of calcium chloride on the cold resistance of Carica papaya seedlings under low temperature stress, Which would screen the best concentration of spraying CaCl2 to improve plant cold hardiness and ensure the safety overwintering. The Carica papaya variety “Tainong 2” was treated under 4℃ stress and spraying CaCl2 with the concentrations of 100 mg /L, 200 mg /L, 300 mg /L, 400 mg /L, 500 mg /L, respectively. The superoxide dismutase (SOD) activity，peroxidase (POD) activity，MDA content of the third function leaf of Carica papaya seedlings were measured as physiological indices for evaluating the cold resistance in 4 days. The result showed that CaCl2 increased total SOD activity、POD activity, which generally presented the trend of increased firstly and decreased finally. The total MDA content decreased and presented the trend of decreased firstly and increased finally. The best result for increasing cold resistance of Carica papaya seedlings was obtained when spraying CaCl2 at the concentration of 300 |
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