根系分泌物中糖和氨基酸对棉花枯萎菌的影响

Effects of Sugar and Amino Acid in Root Exudation of Different Resistant Cotton Cultivars on Cotton Fusarium Wilt Pathogen

通过对中棉、陆地棉（抗、感棉花枯萎病品种）和海岛棉根系分泌物中葡萄糖、蔗糖及不同氨基酸成分和含量的测定表明：棉花感病品种根分泌物中葡萄糖和蔗糖的含量是抗病品种的２～３倍；在所测定的６个棉花品种中共含有１２种氨基酸，其种类和含量依棉花品种不同而异。不同糖的浓度对菌落生长速度影响不大，但影响菌落的旺盛程度及色素的形成。在所测定的１２种氨基酸中，丙氨酸、天冬氨酸、组氨酸、脯氨酸和异亮氨酸对棉枯萎菌的生长略有刺激作用，精氨酸、谷氨酸、赖氨酸、丝氨酸则有抑制作用。

The content of glucose and sucrose in susceptible cotton variety root exudation is two or three times more than resistant varieties.There are twelve amino acids in six cotton varieties root exudation,and the type and quantity of amino acids are different in terms of different variety.The different sugar concentration has little effect on mycelial growing,but it affects the mycelium vigor and color formation.Alanine aspartic acid,histidine,proline,and isoleucine can stimulate the mycelial growth of pathogen,while arginine,glutamate,lysine and serine have suppressive effects.