한빛사논문, 상위피인용논문
- 조회6,126
Abstract
Jaemyung Choi,1 Sung Un Huh,2 Mikiko Kojima,3 Hitoshi Sakakibara,3 Kyung-Hee Paek,2 and Ildoo Hwang1,*
1Department of Life Sciences, Pohang University of Science and Technology, Pohang 790-784, Korea
2School of Life Sciences and Biotechnology/Plant Signaling Network Research Center, Korea University, Seoul 136-701, Korea
3Plant Science Center, RIKEN (The Institute of Physical and Chemical Research), 1-7-22, Suehiro, Tsurumi, Yokohama 230-0045, Japan
*Correspondence
SUMMARY
Cytokinins affect plant immunity to various pathogens; however, the mechanisms coupling plantderived cytokinins to pathogen responses have been elusive. Here, we found that plant-derived cytokinins promote resistance of Arabidopsis to Pseudomonas syringae pv. tomato DC3000 (Pst). Modulated cytokinin levels or signaling activity in CKX- or IPT-overexpressing plants or in ahk2 ahk3 mutants correlated with altered resistance. In fact, the cytokinin-activated transcription factor ARR2 contributes specifically to Pst resistance. The salicylic acid (SA) response factor TGA3 binds ARR2, and mutation of TGA-binding cis-elements in the Pr1 promoter abolished cytokinin- and ARR2-dependent Pr1 activation. Cytokinin treatment did not increase pathogen resistance in tga3 plants, as the cytokinin-dependent induction of Pr1 was eliminated. Moreover, SA signaling enhanced binding of ARR2/TGA3 to the Pr1 promoter. Taken together, these results show that cytokinins modulate the SA signaling to augment resistance against Pst, a process in which the interaction between TGA3 and ARR2 is important.
논문정보
- Research article
- 2010년 08월 (BRIC 등록일 )
- 국내(교신)+국외 연구진
- 생명과학 > 식물학
- 120회 이상 인용된 논문 (상위피인용논문 등록일 2017-08-23)
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