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| 10份青梗菜苗期耐热性评价 |
| Evaluation of Heat Tolerance of 10 Green Petiole Non-heading Cabbages at Seedling Stage |
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| DOI： |
| 中文关键词: 青梗菜 苗期 耐热性 热害指数 隶属函数法 |
| 英文关键词:Green petiole non-heading cabbage Seedling Heat tolerance Heat damage index Affiliation function method Cluster analysis |
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| 摘要点击次数: 379 |
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| 中文摘要: |
| 为综合评价青梗不结球白菜的耐热性，通过在光照培养箱中对10份青梗菜幼苗进行高温胁迫，研究高温胁迫对材料幼苗生长、生理指标的影响，并利用热害指数和隶属函数法综合评价材料的耐热性。结果表明：高温胁迫普遍降低了幼苗的株高、株幅、干鲜重及根冠比等生长指标，同时高温胁迫导致青梗菜幼苗的相对电导率、脯氨酸含量、超氧化物歧化酶及过氧化氢酶活性普遍增加，丙二醛含量相对增加，但可溶性蛋白含量却相对降低。基于热害指数和隶属函数值对材料进行聚类分析，筛选出2份高耐热材料和2份热敏感材料。 |
| 英文摘要: |
| To comprehensively evaluate the heat tolerance of green-petiole,non-heading cabbage seedlings,10 germplasm materials were exposed to high-temperature stress in a light incubator. The effects of high-temperature stress on seedling growth and physiological parameters were analyzed using the heat damage index and the affiliation function method.The results indicated that high-temperature stress generally reduced growth parameters,including plant height,plant width,dry and fresh weight,and the root-to-shoot ratio of seedlings. At the same time,high-temperature stress also increased relative conductivity,proline content,superoxide dismutase,catalase activities,and malondialdehyde content while decreasing soluble protein content in green-petiole,non-heading cabbage seedlings.Based on clustering analysis using the heat damage index and the affiliation function method,two highly heat-tolerant materials (22XS15,22XS156) and two heat-sensitive materials (22XS44,22XS56) were identified. |
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