| 低磷胁迫对草莓幼苗根系生长和酸性磷酸酶活性的影响 |
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| 引用本文： | 吴妤,李卜,李晓彤,刘璐,李奕松.低磷胁迫对草莓幼苗根系生长和酸性磷酸酶活性的影响[J].中国农学通报,2013,29(34):197-200. |
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| 作者姓名： | 吴妤 李卜 李晓彤 刘璐 李奕松 |
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| 作者单位： | 1. 北京农学院植物科技学院2. 北京农学院生物科学与工程学院3. 北京农学院 |
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| 基金项目： | 国家自然科学基金;北京市教委科研平台建设项目 |
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| 摘 要： | 为探讨低磷胁迫对不同品种草莓幼苗的根系生长和酸性磷酸酶活性(APA)的影响，试验选取4个草莓品种（‘红颜’、‘章姬’、‘甜查理’、‘童子一号’），采用水培的方法，设正常磷处理(KH2PO4 1×10-3 mol/L)、低磷处理(KH2PO4 1×10-6 mol/L)2个处理，分别于处理后0、7、14、21、28、35 天，取样对其根系分泌酸性磷酸酶活性进行测定分析，并于处理后35天，测定其根鲜重、主根长、侧根数。结果表明，草莓幼苗受低磷胁迫后，其主根长度受到了抑制，而同期测定的侧根数、根鲜重、根冠比则显著增加。根系分泌的酸性磷酸酶活性在低磷处理早期就有显著提高，且随着低磷胁迫的延续，其活性持续升高；各项形态、生理指标显示，供试4种草莓品种中，‘甜查理’相对于其他供试草莓品种对低磷胁迫环境适应性较好，说明可以通过选择、改良草莓的根系特性来提高草莓的磷效率。
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| 关 键 词： | 发展路径 发展路径 |
| 收稿时间： | 4/2/2013 12:00:00 AM |
| 修稿时间： | 5/8/2013 12:00:00 AM |
Effects of Low Phosphorus Stress on Root Growth and Acid Phosphatase Activity of Strawberry Seedlings |
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| Wu Yu;Li Bo;Li Xiaotong;Liu Lu;Li Yisong.Effects of Low Phosphorus Stress on Root Growth and Acid Phosphatase Activity of Strawberry Seedlings[J].Chinese Agricultural Science Bulletin,2013,29(34):197-200. |
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| Authors: | Wu Yu;Li Bo;Li Xiaotong;Liu Lu;Li Yisong |
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| Institution: | Wu Yu;Li Bo;Li Xiaotong;Liu Lu;Li Yisong;Plant Science and Technology College,Beijing University of Agriculture;College of Biological Science and Engineering,Beijing University of Agriculture; |
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| Abstract: | To investigate some mechanisms, which allow strawberry genotypes to adapt to soils which are low in available P. The root weights , lateral root number, root length, root/shoot-ratio, and acid phosphatase activity(APA) were investigated in four strawberry genotypes(Hong Yan, Zhang Ji, Tian Cha Li,Tong Zi Yi Hao) grown under P-deficient and P-sufficient conditions in hydroponic culture. The results revealed that the root weights, lateral root number, root/shoot-ratio(R/S), and acid phosphatase activity(APA) of the seedlings were all obviously higher during the P-deficiency than they were in the P-sufficient. On the contrary, the root length decreased remarkably under the condition of P-deficiency compared with the P-sufficient. It indicates that the mechanism in morphology and physiology to increase P uptake from the outer environment by which the strawberry seedlings adapt to the P-deficiency. Furthermore, Tian Cha Li compared with other strawberry cultivars has the better environmental adaptability to low phosphorus stress. |
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| Keywords: | low phosphorus stress root acid phosphatase activity strawberry |
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