Scientia Agricultura Sinica ›› 2005, Vol. 38 ›› Issue (07): 1358-1363 .doi: 10.3864/j.issn.0578-1752.at-2005-5108

• PLANT PROTECTION • Previous Articles     Next Articles

Effect of Plant Activator Protein on the Transcription of Defense-Related Genes in Rice Seedlings

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  1. 中国农业科学院农业环境与可持续发展研究所
  • Received:2005-01-21 Revised:1900-01-01 Online:2005-07-10 Published:2005-07-10

Abstract: Rice seedlings sprayed with plant activator protein, a novel proteinaceous elicitor originated from Alternaria spp., developed increased resistance to rice blast after 5 days. Enzymatic activities of phenyalanine ammonialyase (PAL), 1,3- -glucanases and chitnases in rice leaves were enhanced in a similar manner, reached a peak on the 7th, 5th and 9th day, respectively. The protein also led to the transcription activation of defense gene NPR1 and EIN2 since the 1st day, transcription repression of CTR1 after 3 days, but had no effect on transcription level of defense gene PR4, which seemed to indicate that salicylic acid ( SA) and ethylene (Et) signal pathway may mediate the resistance plant activator protein induced.

Key words: Plant activator protein, Rice, Rice blast, Resistance

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