| 杨涛,李昊宸,赵康,王红刚,程璐瑶,高文伟.基于根系特征分析海岛棉幼苗耐碱性[J].干旱地区农业研究,2023,(2):21~26 |
| 基于根系特征分析海岛棉幼苗耐碱性 |
| Analysis of alkali tolerance of Sea\|island cotton seedlings based on root characteristics |
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| DOI：10.7606/j.issn.1000-7601.2023.02.03 |
| 中文关键词: 海岛棉 Na23胁迫 幼苗 根系特征 耐碱性 |
| 英文关键词:Sea\|island cotton Na2CO3 stress seedling root characteristics alkali tolerance |
| 基金项目:国家自然科学基金（31771885）；国家重点研发计划项目（2016YFJ01407） |
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| 中文摘要: |
| 针对海岛棉幼苗期进行耐碱性研究，设置不同Na2CO3胁迫浓度（0.00%、0.07%、0.09%和0.11%)，待幼苗长至第11天根据其根部特征筛选海岛棉耐Na23的最适浓度，并基于最适浓度评价海岛棉的耐受性。结果表明，0.09%的Na23胁迫最适于鉴定海岛棉耐碱性；在0.09%的Na23碱胁迫下，海岛棉品种根系特征性状均受到不同程度抑制，像素面积变异最弱。主成分分析将根部特征性状分为3个主成分，第1主成分为根系生物量和形态因子；第2主成分为侧根因子；第3主成分为主根长度因子。隶属函数值和D值之间拟合性较好，呈显著相关，因此可将两者统一进行综合评价，将海岛棉划分为敏感型、弱耐碱型、耐碱型和强抗型4类，并筛选到敏感材料4401和S(L)，强抗材料JZ-1；供试海岛棉材料主要以中间型为主，极端材料较少。 |
| 英文摘要: |
| In this study, the alkali resistance of Sea\|island cotton was studied at the seedling stage of Sea\|island cotton. Different Na2CO3 stress gradients of 0.00%, 0.07%, 0.09% and 0.11% were set. The optimal gradient of Na2CO3 was used to evaluate the tolerance of Sea\|island cotton. The results showed that 0.09% Na2CO3 stress was the most suitable for identifying alkali resistance of Sea\|island cotton. Under 0.09% Na2CO3 alkali stress, the root characteristics of Sea\|island cotton varieties were inhibited to varying degrees, and the pixel area variation was weak. The traits were divided into 3 components: the first principal component was root biomass and morphological factor; the second principal component was lateral root factor; the third principal component was principal root length factor. The fitting between the membership function value and the D value was good and significant. Therefore, a comprehensive evaluation of the two could be carried out. The alkali resistance of Sea\|island cotton was divided into four categories: sensitive, weak alkali resistance, alkali resistance, and strong resistance. The sensitive materials 4401 and S(L) and strong resistance materials JZ-1 were selected. Sea\|island cotton materials were mainly intermediate and less extreme materials. |
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