The Relationship Of Oleoresin Yield Between Anatomical,Physiological And Biochemical Characteristics Of Pinus Yunnanensis

Oleoresin have high ecological and economic value.It is the main secondary metabolite of Pinus,and also an important chemical raw material for forest products.Pinus yunnanensis Franch is the main tree speciesof tapping oleoresin in Southwest China,which have high research value.In order to understand and explored the anatomical and physiological and biochemical characteristics and the factors in influencing oleoresin yield of Pinus yunnanensis Franch.The differences in anatomical and physiological and biochemical characteristics in high and low oleoresin yieldwere compared,and their relationships with oleoresin yield of Pinus yunnanensis were analyzed,to provide the basis for breeding and directional cultivation high yielding oleoresin Pinus yunnanensis.The main conclusions are as follows:1.The number of resin canalsand secrete cells in the forest of high oleoresin yield were significantly higher than those with low yield.The oleoresin yield increased with the number of resin canal in leaves,phloem and xylem and the number secrete cells in leaves and xylem increasing(P<0.01).2.The content of soluble sugar,nitrogens,phosphorus,chlorophyll a,chlorophyll b and chlorophyll a+b in the forest of high oleoresin yield were significantly higher than those with low yield.The oleoresin yield increased with the content of soluble sugar,nitrogens,phosphorus,chlorophyll a,chlorophyll b and chlorophyll a+b in leaves increasing(P<0.01).3.The content of soil available nitrogen and the activity of protease,catalase,and urease in the forest of high oleoresin yield were very significantly higher than those with low yield(P<0.01).The content of soil available nutrient(P,Fe,Mn,Zn and Cu)in the forest of high oleoresin yield were significantly higher than those with low yield(P<0.05).The oleoresin yield increased with the content of available nutrients and soil activities of protease,catalase,and urease increasing.4.The three principal components are extracted by using principal component analysis.The load of the number of resin canalin xylem,the congtent of nitrogen in leaves and the content of available nitrogen in soil with the three principal components were the largest.Immedately,the oleoresin yield between the number of resin canalin xylem,thecongtent of nitrogen in leavesand the content of available nitrogen in soil were most related.The result implied that the number of resin canalin xylem,the congtent of nitrogen in leavesand the content of available nitrogen in soil could be proposed as indicators for breeding highyielding oleoresin Pinus yunnanensis.