Galactinol is Involved in Induced Systemic Resistance againstBacterial Infection and Environmental Stresses

• 발행기관: 한국자원식물학회
• 저자명: Song Mi Cho Su Hyun Kim Young Cheol Kim Kwang Yeol Yang Kwang Sang Kim Yong Soo Choi Baik Ho Cho
• 간행물 정보: 『한국자원식물학회지』제23권 제3호, 248~255쪽, 전체 8쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2010.06.30

영문 초록

We previously demonstrated that root colonization of the rhizobacterium, Pseudomonas chlororaphis O6, induced expression of a galactinol synthase gene (CsGolS1), and resulting galactinol conferred induced systemic resistance (ISR) against fungal and bacterial pathogens in cucumber leaves. To examine the role of galactinol on ISR, drought or high salt stress, we obtained T-DNA insertion Arabidopsis mutants at the AtGolS1 gene, an ortholog of the CsGolS1 gene. The T-DNA insertion mutant compromised resistance induced by the O6 colonization against Erwinia carotovora. Pharmaceutical application of 0.5 - 5 mM galactinol on roots was sufficient to elicit ISR in wild-type Arabidopsis against infection with E. carotovora. The involvement of jasmonic acid (JA) signaling on the ISR was validated to detect increased expression of the indicator gene PDF1.2. The T-DNA insertion mutant also compromised tolerance by increasing galactinol content in the O6-colonized plant against drought or high salt stresses. Taken together, our results indicate that primed expression of the galactinol synthase gene AtGolS1in the O6-colonized plants can play a critical role in the ISR against infection with E. carotovora, and in the tolerance to drought or high salt stresses.

목차

Introduction

Materials and Methods

Results and Discussion

Acknowledgment

Literature Cited

키워드

drought Erwinia carotovora galactinol high salt jasmonate induced systemic resistance rhizobacteria