Abstract
Drought is a major limiting factor in the cultivation of Sophora alopecuroides in China’s arid and semi-arid regions. This study aimed to identify drought-resistant S. alopecuroides ecotypes and explore key drought tolerance indicators during germination by simulating drought conditions with a 10% PEG-6000 solution, using pure water as a control. Determination of seven germination indicators for S. alopecuroides, including germination rate (GR), germination energy (GE), germination index (GI), vigor index (VI), promptness index (PI), fresh weight (FW), and dry weight (DW), was conducted. Principal component analysis (PCA), membership function, cluster analysis, and linear regression were employed to comprehensively evaluate the drought resistance of thirty-five S. alopecuroides ecotypes. The results showed that drought stress caused reductions in six of the seven indicators across all ecotypes, except for DW, compared to the control. Correlation analysis revealed varying relationships among the indicators, with most showing significant or highly significant correlations. PCA reduced the seven indicators to two independent comprehensive factors, with a cumulative contribution rate of 83.99%. Based on the D-value and cluster analysis, the thirty-five ecotypes were ranked for drought resistance and classified into four categories. The top five drought-tolerant genotypes during the germination stage were identified as Yutian, Alar, Jinghe, Baoding, and Guyuan. Moreover, the stepwise regression model was established and demonstrated that GR, GE, PI, FW, and DW are key indicators for screening and identifying drought-resistant S. alopecuroides ecotypes. This study offers a comprehensive and reliable method for evaluating drought resistance in S. alopecuroides ecotypes and provides a reference for selecting ecotypes for artificial cultivation in Northwestern China.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
PEG drought stress reduced six germination indicators other than dry weight across all ecotypes relative to water control.
Verbatim
e0“The results showed that drought stress caused reductions in six of the seven indicators across all ecotypes, except for DW, compared to the control.”
Claim · model-written summary
Most germination indicators had significant or highly significant correlations with other indicators.
Not reportedTaxonDirection
Verbatim
e0“Correlation analysis revealed varying relationships among the indicators, with most showing significant or highly significant correlations.”
Claim · model-written summary
PCA reduced seven germination indicators to two factors explaining 83.99% cumulatively.
Not reportedTaxon
Verbatim
e0“PCA reduced the seven indicators to two independent comprehensive factors, with a cumulative contribution rate of 83.99%.”
Claim · model-written summary
Thirty-five ecotypes were ranked for drought resistance into four categories.
Verbatim
e0“Based on the D-value and cluster analysis, the thirty-five ecotypes were ranked for drought resistance and classified into four categories.”
Claim · model-written summary
Yutian was identified among the top drought-tolerant germination-stage genotypes.
Verbatim
e0“The top five drought-tolerant genotypes during the germination stage were identified as Yutian, Alar, Jinghe, Baoding, and Guyuan.”
Claim · model-written summary
Alar was identified among the top drought-tolerant germination-stage genotypes.
Verbatim
e0“The top five drought-tolerant genotypes during the germination stage were identified as Yutian, Alar, Jinghe, Baoding, and Guyuan.”
Claim · model-written summary
Jinghe was identified among the top drought-tolerant germination-stage genotypes.
Verbatim
e0“The top five drought-tolerant genotypes during the germination stage were identified as Yutian, Alar, Jinghe, Baoding, and Guyuan.”
Claim · model-written summary
Baoding was identified among the top drought-tolerant germination-stage genotypes.
Verbatim
e0“The top five drought-tolerant genotypes during the germination stage were identified as Yutian, Alar, Jinghe, Baoding, and Guyuan.”
Claim · model-written summary
Guyuan was identified among the top drought-tolerant germination-stage genotypes.
Verbatim
e0“The top five drought-tolerant genotypes during the germination stage were identified as Yutian, Alar, Jinghe, Baoding, and Guyuan.”
Claim · model-written summary
The regression model identified GR, GE, PI, FW, and DW as key drought-screening indicators.
- Taxon
- S. alopecuroides
Sophora alopecuroidese0 - Outcome
- key indicatorse0
- Value
- GR, GE, PI, FW, and DWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the stepwise regression model was established and demonstrated that GR, GE, PI, FW, and DW are key indicators for screening and identifying drought-resistant S. alopecuroides ecotypes.”