Cotton Science  2005£¬17(2)£º107-111

Effects of Inducers on Relevant Resistant Substance in Colored Cotton
WANG Rong, LI Guan^*, LI Yan
(College of Biology,XinJiang University,Urumqi 830046,China) ª¤ª¤

Abstract: According to this present situation, the promising way is inducing the plant acquired the SAR by inducer. It has some advantages,e.g.safe,efficient,wide and last etc. Inducing resistance is a kind of hereditary potential of plant.And the potential can be expressed if we use appropriate inducer,which can strengthen the ability of resistance against germs,fungi and viruses.
ª¥ We studied different varities of colored cotton in Xinjiang, and screened out several effectivley inducers. Having used SA, FeSO₄£¬K₂HPO₄, MgCl₂£¬SA-FeSO₄, SA-MgCl₂, we induced two species:Xincaimian1 and Xincaimian3. Then searched the change of different resistance substance in leaves after infection with Fuserium oxysporum . The result showed great changes have taken place in the content of relatively resistance substance after inducement and challenge.There are two parts.(1) the content of chlorophyll , and activity of phenylalanine ammonia lyase(PAL) & calatase(CAT) in contrast to control have remarkably increased.And,Xincaimian1,a resistant cultivar,showed a higher increasing rate of them than a susceptible cultivar,Xincaimian3. (2)After inducement ,the change of SA,which is possible signal in SAR,can be detected in two varities of colored cotton.And it showed the changing trend from increasing to decreasing. With the increasing of content of SA, pathogenesisª²relatedª²proteins(PR Proteins) were induced,which can promote the resistance of colored cotton.
ª¥ From above,it is feasible that inducer can increase the resistance against Fuserium oxysporum. The effect of mixture inducers was much better than single ones among the six kinds of inducer.
Key words: induced resistance£»Fuserium oxysporum£»colored cotton
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