摘要
以上海辰山植物园引种驯化的8种中国原产鼠尾草属(Salvia L.)植物为材料,测定了其高温半致死温度(LT50)和叶绿素相对含量(SAPD值),比较这8种植物的耐热性差异,从而对其在引种地的高温适应性做出分析与评价。结果表明,8种鼠尾草属植物的LT50值在50~57℃,且均呈"S"型曲线上升。8种植物的耐热性从强到弱依次排序为:贵州鼠尾草(Salvia cavaleriei Lévl.)>红根草(S.prionitis Hance)>南川鼠尾草(S.nanchuanensis H.T.Sun)>血盆草(S.cavaleriei Lévl.var.simplicifolia Stib.)>云南鼠尾草(S.yunnanensis C.H.Wright)>美丽鼠尾草(S.meiliensis S.W.Su)>南丹参(S.bowleyana Dunn)>佛光草(S.substolonifera E.Peter)。利用Spearman秩相关性分析比较,结果表明,各植物的LT50值与SAPD值大小排序呈显著正相关,可以作为评价鼠尾草属植物耐热性的指标。
Utilizing 8 domestic Salvia L. species collected in Shanghai Chenshan Botanical Garden as materials, semi-lethal temperature（LT50）, chlorophyll relative content（SAPD value） were measured to evaluate the thermo tolerance of the 8 species. The results indicated that the LT50 value of the 8 domestic Salvia species was 50 to 57 ℃, and all showed ascend trend by ＂S＂ curve. The heat resistance of the 8 species was listed in descending order as following： Salvia cavaleriei Levl.〉S. prionitis Hance〉S. nanchuanensis H. T. Sun〉S. cavaleriei Levl. var. simplicifolia Stib.〉S. yunnanensis C. H. Wright〉S. meiliensis S.W. Su〉S. bowleyana Dunn〉S. substolonifera E. Peter. There was significant positive correlation between LT50 and SAPD. Therefore, LT50 and SAPD can be used as the indexes to value the heat resistance of sage plants.
出处
《湖北农业科学》
2017年第16期3088-3092,共5页
Hubei Agricultural Sciences
基金
上海市绿化局辰山专项(G162408
G172410)
中国科学院战略生物资源科技支撑体系运行专项(ZSZY-001)
