Abstract:

The cold resistance variation of 204 natural hybrid progenies of Huangshanzhong tea plants (Camellia sinensis (L.) O. Kuntze) were systematically appraised and evaluated to collect the cold resistance tea germplasms. The total thickness, horny layer thickness, upper & under layer epidermis thickness, palisade tissue layering & thickness and spongy tissue tightness & thickness were observed by Freehand Section. And the related ratios were calculated according to the determined results. The results showed that the leaf anatomical structure diversity and variation were significant in the natural hybrid progenies of Huangshanzhong tea plants. The average diversity index and coefficient of variation were 1.69 and 23.69%, respectively. Cold resistance was accorded with most of anatomical structure of Huangshanzhong tea plants. The cluster analysis of the anatomical structure index of leaves showed that the first 3 groups have high cold resistance. Thus, the anatomical structure variation can be used to select the cold resistance germplasms.