| 不同抗旱性花生品种根系形态及生理特性 |
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| 引用本文： | 厉广辉,万勇善,刘风珍,张昆. 不同抗旱性花生品种根系形态及生理特性[J]. 作物学报, 2014, 40(3): 531-541. DOI: 10.3724/SP.J.1006.2014.00531 |
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| 作者姓名： | 厉广辉 万勇善 刘风珍 张昆 |
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| 作者单位： | 作物生物学国家重点实验室 / 山东农业大学农学院, 山东泰安271018 |
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| 基金项目： | 本研究由国家现代农业产业技术体系建设专项(CARS-14), 国家自然科学基金项目(31201167)和山东省花生良种产业化工程项目资助。 |
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| 摘 要： | 以12个花生品种为试验材料, 在人工控水条件下, 通过苗期及结荚期干旱试验, 对比分析花生品种苗期根系性状与抗旱性的关系。结果表明, 花生苗期与结荚期抗旱性基本一致。利用产量抗旱系数可把12个花生品种的抗旱性划分为强、中、弱3级, 抗旱性强的品种为A596、山花11和如皋西洋生, 中度抗旱品种为花育20、农大818、海花1号、山花9号和79266, 抗旱性弱的品种有ICG6848、白沙1016、花17和蓬莱一窝猴。山花11可作为花生强抗旱性鉴定的标准品种, 79266可作为花生弱抗旱性鉴定的标准品种。山花9号、山花11、花育20的根系抗旱机制为较大的根量及根系吸收能力, 而A596、如皋西洋生、农大818、山花11为较强的根系抗氧化能力及膜稳定性。相关分析表明, 苗期重度干旱胁迫下的单株根系干重、体积、总吸收面积、超氧化物歧化酶(SOD)活性和丙二醛(MDA)含量与品种抗旱系数的相关性达极显著水平, 对照与重度干旱胁迫下的以上性状呈极显著正相关。因此, 在花生出苗后10 d进行40%土壤相对含水量的干旱胁迫, 持续胁迫至出苗24 d的单株根系干重、体积、总吸收面积、根尖SOD活性和MDA含量可鉴定花生品种的根系抗旱能力, 正常水分下的性状值也能反映根系性状的抗旱级别。山花11可作为花生根系形态及生理优异抗旱性状鉴定的标准品种。
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| 关 键 词： | 花生品种 干旱胁迫 根系特性 抗旱性 |
| 收稿时间： | 2013-08-06 |
Morphological and Physiological Traits of Root in Different Drought Resistant Peanut Cultivars |
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| LI Guang-Hui,WAN Yong-Shan,LIU Feng-Zhen,ZHANG Kun. Morphological and Physiological Traits of Root in Different Drought Resistant Peanut Cultivars[J]. Acta Agronomica Sinica, 2014, 40(3): 531-541. DOI: 10.3724/SP.J.1006.2014.00531 |
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| Authors: | LI Guang-Hui WAN Yong-Shan LIU Feng-Zhen ZHANG Kun |
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| Affiliation: | National Key Laboratory of Crop Biology / College of Agronomy, Shandong Agricultural University, Tai’an 271018, China |
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| Abstract: | Drought stress is a serious constraint for peanut production worldwide. It is necessary to identify the drought resistance mechanisms of different peanut cultivars in drought-resistance breeding. Under the artificial water control condition, the peanut root morphological and physiological characteristics under drought stress at seedling stage and pod-setting stage were studied using 12 different drought-resistance peanut cultivars as material. The results showed that drought resistance at seedling stage was basically identical with that at pod-setting stage. According to yield-drought resistance coefficient, 12 peanut cultivars were divided into three grades: high-resistance, including A596, Shanhua 11, and Rugaoxiyangsheng; mid-resistance, including Huayu 20, Nongda 818, Haihua 1, Shanhua 9, and 79266; and weak-resistance, including ICG6848, Baisha 1016, Hua 17, and Penglaiyiwohou. In those peanut cultivars, Shanhua11 can be used as the standard cultivar for high drought resistance identification, and 79266 as the standard cultivar for weak one. The root drought resistance mechanism of 12 peanut cultivars were different, Shanhua 9, Shanhua11 and Huayu 20 presented a larger biomass and strong absorption capacity, while A596, Nongda 818, Shanhua 11 and Rugaoxiyangsheng had strong antioxidant capacity and membrane stability under drought stress. Correlations between drought resistance and root weight, volume, total absorption area per plant, root superoxide dismutase (SOD) activity, malondialdehyde (MDA) content under serious drought stress were significant, also under control condition. Therefore, under drought stress of 40% RWC for 10 to 24 d after germination, the root weight, volume, total absorption area per plant, SOD activity and MDA content could be used for identifies the drought resistance ability of peanut roots, the resistances degree also can be reflected by the indices above under normal water condition. Shanhua 11 can be used as a suitable standard cultivar for root morphological and physiological drought resistance characteristics identification in peanut |
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| Keywords: | Peanut cultivars Drought stress Root traits Drought resistance |
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