八种中国原产鼠尾草属植物耐热性比较

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。

Research on Thermo Tolerance of Eight Domestic Salvia in China

Utilizing 8 domestic Salvia L. species collected in Shanghai Chenshan Botanical Garden as materials, semi-lethal t emperature(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 Lévl.﹥S. prioni-tis Hance﹥S. nanchuanensis H. T. Sun﹥S. cavaleriei Lévl. 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.