Anatomical Structure and Stress Resistance Evaluation of Leaves of Rhododendron L.in the Shergyla Mountain
Research on the variations in anatomical structure among different species of Rhododendron L.and environmental response strategies can offer fundamental data for the investigation of plant adaptive evolution.The paraffin sealing technique was used to examine the difference and stress resistance of each anatomical structure in five different species of Rhododendron L.found in the Shergyla Mountain.The results showed that,five Rhododendron L.species exhibited typical ectopic leaves,made up of three parts:mesophyll,epidermis and veins.Significant differences were observed among the species in terms of leaf thickness(LLT),upper cuticle thickness(LUCT),upper epidermis thickness(LUET),palisade tissue thickness(LPMT),spongy tissue thickness(LSMT),and tightness of leaf palisade tissue(LPMT/LT)(P<0.05).Principal component analysis results showed that the stress resistance of the leaf anatomical structure of the five species of Rhododendron L.could be assessed using lower epidermal thickness(LLET),LSMT,LPMT/LT,palisade tissue and spongy tissue ratio(LPMT/SMT),and protrusion of the main vein(LMPD).The stress resistance of the five species of Rhododendron L.was arranged as follows:Rhododendron nivale(RNH)>Rhododendron wardii(RWW)>Rhododendron bulu(RBH)>Rhododendron nyingchiense(RNR)>Rhododendron aganniphum(RAB).In summary,RNH shows strong resistance and can be utilized in the selection of Rhododendron varieties.
国家科技期刊平台
NSTL
万方数据
