Study on Leaf Anatomical Structure Indexes Related to Drought Resistance of Pummelo

Ten cultivars pummelo were used as test material,the drought resistance indexes of leaf thickness,top epidermis thickness,lower epidermis thickness,thickness of palisade tissue,leaf tissue structure tense ratio(CTR),longitudinal diameter of stoma,horizontal diameter of stoma,stoma density,stoma size and relative area of different cultivars pummelo were measured,by the method of membership function on drought resistance indexes were analyzed.The results showed that differences of each anatomical leaf structure index among the 10 cultivars were extremely significant.Then the principal component analysis of 10 leaf anatomical structure indexes were calculated.According to the result,an order of drought resistance of the 10 cuhivars was given by using subordinate function values analysis:ZuoshiyouAiwenyouDongfengzaoyouHumiyouQiyouHuayingshanyouTongxianyouLiangpingyouZaoshuyouChandler Pummelo.