| 甘薯品种抗旱性生理指标及其综合评价初探 |
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| 引用本文： | 钮福祥,华希新.甘薯品种抗旱性生理指标及其综合评价初探[J].作物学报,1996,22(4):392-398. |
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| 作者姓名： | 钮福祥 华希新 |
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| 作者单位： | 江苏徐州甘薯研究中心，江苏徐州，221121 |
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| 基金项目： | 国际马铃薯中心(CIP)资助项目 |
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| 摘 要： | 采用土壤干旱和室内ＰＥＧ水分胁迫测定相结合的办法，研究有关生理指标与甘薯抗旱性关系，结果表明，水分胁迫下伴随着叶片相对含水量（ＲＷＣ）的明显下降，丙二醛（ＭＤＡ）含量显著增加，质膜相对透性（ＲＰＰ）急剧上升，而过氧化氢酶ＣＡＴ活性迅速下降；抗旱性强的品种叶片ＲＰＰ和ＭＤＡ的增加幅度显著你芋不抗旱品种，而前者叶片ＲＷＣ和ＣＡＴ活性的下速度显著慢于后者，并具有比后者较强的渗透调节能力，中等抗旱品种介乎
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| 关 键 词： | 甘薯 抗旱性 水分胁迫 生理指标 综合评价 |
| 收稿时间： | 1994-08-11 |
| 修稿时间： | 1995-10-05 |
Studies on Several Physiological Indexes of the Drought Resistance of Sweet Potato and Its Comprehensive Evaluation |
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| Niu Fuxiang,Hua Xixin,Guo Xiaoding,Wu Jinyu,Li Hongmin,Ding Chengwei.Studies on Several Physiological Indexes of the Drought Resistance of Sweet Potato and Its Comprehensive Evaluation[J].Acta Agronomica Sinica,1996,22(4):392-398. |
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| Authors: | Niu Fuxiang Hua Xixin Guo Xiaoding Wu Jinyu Li Hongmin Ding Chengwei |
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| Affiliation: | Xuzhou Sweet Potato Research Center,Jiangsu,221121 |
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| Abstract: | The effects of water stress on several physiological indexes in the lab . and the relationship between those indexes and drought resistance in the field were studied with nine sweet potato varieties. The results showed that malondialdehyde (MDA) content and relative plasmalemma permeability (RPP) increased and catalase (CAT) activity decreased with the decrease of relative water content (RWC) in the leaves, and the increases of RPP and MDA and the decreases of RWC and CAT activity in the leaves of high drought-resistance varieties were much less than those of poor drought-resistance ones which had lower ability of osmotic adjustment than the fomer under water stress condition. The correlative relationship between the physiological indexes and drought resistance of the varieties was in such order: RWOCAT activity >RPP>Soluble sugar>Protein-N. The correlation coefficient between the weighed average of subordinate function values(WAOSFV) of these five physiological indexes and drought resistance was highly positively significant (r=0. 956, P<0. 01), and three of the indexes, RWC, CAT and RPP, could approximately substitute for the five indexes. The results also suggested that the comprehensive physiological indexes for water stress in the lab. might be used for evaluation of the drought resistance of sweet potato varieties in the field. |
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| Keywords: | Sweet potato Drought resistance Water stress Physiological indexes Comprehensive evaluation |
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