10种无机盐对橡胶树多主棒孢病菌的抑菌作用及对粗毒素的钝化  

Inactivation Effect of 10 Compounds on Corynespora cassiicola and Its Toxin

作　　者：林春花[1] 彭建华[1] 刘先宝[1] 时涛[1] 蔡吉苗[1] 黄贵修[1] 

机构地区：[1]中国热带农业科学院环境与植物保护研究所农业部热带农林有害生物入侵监测与控制重点开放实验室,海南儋州571737

出　　处：《热带作物学报》2010年第7期1143-1147,共5页Chinese Journal of Tropical Crops

基　　金：国家科技支撑计划项目(2007BAD48B04);中国热科院环植所中央级公益性科研院所基本科研业务费专项(No.2009hzs1J014);海南省自然科学基金项目(309049;807041)资助

摘　　要：以橡胶树棒孢霉落叶病病原菌及其产生的粗毒素为供试材料,研究了10种无机盐对多主棒孢菌株菌丝生长、分生孢子萌发的抑制作用和对其粗毒素的钝化作用。结果表明:CuSO4.5H2O、FeCl3和FeSO4.6H2O在2～5mg/mL浓度范围内对多主棒孢病菌菌丝生长及其孢子萌发都有很强抑制作用,菌丝生长抑制率为100%,孢子萌发率为0。KMnO4在0.5～5 mg/mL浓度范围内能够完全抑制孢子的萌发,而1～5 mg/mL浓度范围内却促进菌丝的生长。KMnO4和FeCl3在浓度为0.5 mg/mL时对该毒素均有很强的钝化作用,萎蔫指数分别为2.04%和3.97%。Inactivation effect of 10 kinds of inorganic salts with 4 different concentrations on the hyphal growth, conidial germination and the toxin of Corynespora cassiicola （the pathogen of Corynespora leaf fall disease of rubber） were studied. The results indicated that growth of myeelia and germination of spores were inhibited strongly by CuSO4·5H2O, FeCl3 and FeSO4·6H2O in 2-5 mg/mL concentrations, the inhibition rate of hypha was 100% and the germination rate of spore was 0. The germination of spores was completely inhibited by KMnO4 in 0.5-5 mg/mL concentrations, but the growth of myeelia was promoted by KMnO4 in 1-5 mg/mL concentrations. The toxin could be passivated strongly by KMnO4 and FeCl3 at a concentration of 0.5 mg/mL, and the wilting rates was 2.04% and 3.97% respectively. However, CuSO4·5H2O and FeCl3 were poisoning to the leaves of rubber tree at a concentration of 0.5 mg/mL, and the wilting rates was 45.68% and 40%, respectively.

关 键 词：无机盐 橡胶树多主棒孢病菌 毒素 钝化 

分 类 号：S794.1[农业科学—林木遗传育种] S432.4[农业科学—林学]