| 基于多变量综合分析多效唑对甜瓜幼苗抗逆生理的影响 |
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| 引用本文：梁任繁，符志新，周 鹏，林 旭，苏义成.基于多变量综合分析多效唑对甜瓜幼苗抗逆生理的影响[J].西北农业学报,2025,(2):280~289 |
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| 基金项目:广西科技计划（桂科AD1828195）；广西农科院基本科研业务专项（桂农科2021YT169，桂农科2018YT35，桂科农2016YM10，桂农科2017JZ35）。 |
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| 中文摘要:采用多变量统计方法，解析多效唑对甜瓜幼苗抗性生理效应及其相互关系。结果表明，多效唑显著增加可溶性糖（TSS）、可溶性蛋白质（sPRO）、抗坏血酸（AsA）、脯氨酸（Proline）、总叶绿素（Chl）和叶绿素a（Chla）等物质含量，显著提高谷胱甘肽还原酶（GR）、过氧化物酶(POD)、抗坏血酸过氧化物酶(APX)等酶活性；丙二醛（MDA）与全钾（TK，R=-0.78）、全氮（TN，R=-0.57）、谷胱甘肽（GSH，R=-0.89）、超氧化物歧化酶（SOD，R=-0.92）、过氧化氢酶（CAT，R=-0.86）等显著负相关。观测指标可聚成2个类群，分别占70.59%和29.41%，同类指标间彼此呈正相关；17个生理指标可提取出3个主成分，分别命名为：功能性物质代谢、营养物质代谢、光合作用，各占总信息量74.91%、10.75%、6.53%，对应关键指标为：可溶性糖、磷、叶绿素b。综上，多效唑可提高甜瓜幼苗抗逆性，50~150 mg/L为最佳处理浓度，主要集中表现为功能性物质代谢、营养代谢、光合作用等三方面功能效应，可溶性糖可作为衡量多效唑处理甜瓜幼苗抗逆性强弱的决定性指标。 |
| 中文关键词:多效唑 甜瓜 多变量分析 抗逆生理 |
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| Effect of Paclobutrazol on Stress Resistance Physiology of Melon Seedlings Based on Multivariate Analysis |
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| Abstract:This study analyzed thephysiological resistance effects of paclobutrazol (PP333) on the melon seedlings and their interrelationships using multivariate statistical methods.The results indicate that paclobutrazol treatment significantly increased the content of soluble sugar(TSS), soluble protein(sPRO), ascorbic acid (AsA), proline, total chlorophyll(Chl) and chlorophyll a(Chla). It also significantly increased the activities of glutathione reductase(GR),peroxidase(POD) and ascorbic acid peroxidase(APX) etc. Malondialdehyde (MDA) was negatively correlated with total potassium (TK,R=-0.78),total nitrogen (TN,R=-0.57),glutathione (GSH,R=-0.89), superoxide dismutase (SOD, R=-0.92),catalase (CAT, R=-0.86),etc. All resistance indexes could be clustered into 2 groups, accounting for 70.59% and 29.41% respectively.There was a positive correlation between indicators of the same kind;three common factors could be extracted from 17 physiological indicators, and were respectively named: functional substance metabolism,nutrient metabolism,photosynthesis. They accounted for 74.91%,10.75% and 6.53% of the total information.The corresponding key indicators were soluble sugar, phosphorus, chlorophyll b.Thus it can be seen that paclobutrazol can improve the stress resistance of melon seedlings. A concentration of 50-150 mg/L is the best treatment, which is mainly manifested in the functional effects of functional substance metabolism,nutrient metabolism and photosynthesis. Soluble sugar is a decisive indicator for measuring the stress resistance of melon seedlings treated with paclobutrazol. |
| keywords:Paclobutrazol Melon Multivariable analysis Resistance physiology |
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