Low temperature tolerance of 11 germplasms of Lagenaria siceraria(Mol.)stand under cold stress and low light
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摘要: 以11份瓠瓜种质幼苗为试材,在低温弱光胁迫下,测定6个生理生化指标以及主成分,并进行聚类分析,对其耐寒性进行研究。结果表明:持续7 d的低温弱光处理,能够有效区分瓠瓜种质的耐寒性;6个指标测定结果的主成分分析和系统聚类能够对瓠瓜种质的耐寒性进行有效评价;聚类分析筛选出耐寒型种质2份,较耐寒种质5份,次敏感型种质3份和敏感型种质1份。Abstract: Low temperature tolerance of 11 germplasms of Lagenaria siceraria(Mol.)Stand was studied under the stress of low temperature and dim light.Six biochemical and physiological indices and major chemical components were used for the analysis.Results revealed that the low temperature tolerance abilities of these 11 accessionscould be effectively differentiated by the stress test in 7 days,and that the biochemical and physiological indices and chemical composition could be applied for species evaluation.The 11 accessions were thus clustered into 4 groups with varying degrees of low temperature tolerance,i.e.,2 cold tolerant,5 cold semi-tolerant,3 cold semi-sensitive,and 1 cold sensitive germplasm.
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