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.
Salvia L.heat resistancesemi-lethal temperature (LT50)SAPD value