Abstract: ID-ELISA for detecting the endogenous hormone contents was adopted to find out the correlation of the symptoms and the endogenous hormones． In the study，high-susceptble corn variety Zhengdan 958 was inoculated of RBSDV onto the seedlings through the virulent vectors of Laodelphax striatellusFallen in greenhouse． The four tested endogenous hormones were gibberellin(GA3 ), indole-3-acetic acid(IAA),abscisic acid(ABA) and zeatin riboside( ZR). The results were summaried as follows: in leaves and roots，GA3 contents in infected plants were obviously lower than those in the healthy，besides the more stunted plants were， the lower GA3 contents detected ; while ABA contents kept higher in diseased than in healthy ones through the whole growth stages． Moreover，ABA contents increased more as the symptoms developed． IAA contents showed higher at the beginning and forming periods of enations(seedling to jointing stages) in the diseased than in the healthy controls． By big trumpet growth stage， it showed no obvious difference between diseased and healthy ones． There were higher ZR in levels and roots in healthy than in diseased ones． In young shoot tissue， the contents of four kinds of endogenous hormones were no significant difference in heathy and infected plants in seedling stage． It indicated that the symptoms appearance and development were strongly correlated to the endogenous hormone contents．

Key words: Rice black-streaked dwarf fijivirus(RBSDV), Endogenous hormone, Maize rough dwarf disease, Maize

CLC Number: 

• S435