Physiological effect of Bemisia tobacci on cotton leaves under feeding pressure | 烟粉虱刺吸胁迫对棉花叶片生理的影响
2009
Zhou Dandan, Gansu Agricultural University, Lanzhou(China), College of Prataculture | Liu Changzhong, Extension Center of Agricultural Technology of Dunhuang City, Dunhuang(China) | Jiang Shenglin, Extension Center of Agricultural Technology of Dunhuang City, Dunhuang(China)
chinois. 2007年在敦煌市以烟粉虱-棉花为模式,研究了棉花在烟粉虱胁迫下化学防御的生理生化特征.在不同虫口密度下,测定了棉花叶片中超氧化物歧化酶（SOD）、过氧化物酶（POD）、过氧化氢酶（CAT）、抗坏血酸过氧化物酶（APX）、类胡萝卜素（Car）的动态变化.结果表明,烟粉虱作用后,棉株叶片SOD、POD、CAT和APX活性与虫口密度呈正相关,而类胡萝卜素含量与虫口密度呈负相关.距虫源10 m处SOD、POD、CAT、APX活性和类胡萝卜素含量变化大于距虫源20 m处.[著者文摘]
Afficher plus [+] Moins [-]anglais. A field experiment based on the cotton-Bemisia tobacci interaction system was carried out in 2007 in Dunhuang City, Gansu Province, in order to study the physiological and biochemical characteristics of cotton（the cultivar ‘Dunmian V3＇） in chemical defense under the stress of the insect Bemisia tobacci. The dynamic changes of six physiological and biochemical indexes such as superoxide dismutase （SOD）, and peroxidase （POD）, and catalase （CAT）, and ascorbate peroxidase （APX）, and carotenoid （Car） in the cotton leaves in different population density were measured. The results showed that the activity of SOD, POD, CAT and APX in the cotton leaves, after influenced by the insect, were positively correlated to the difference of insect population density, however, carotenoid content was negatively correlated to the difference of insect population density. Such variations of SOD, POD, CAT, APX activity and carotenoid content of cotton leaves were more significant at the distance of 10 m than 20 m from insect sources.
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