共 54 条
DELLAs Modulate Jasmonate Signaling via Competitive Binding to JAZs
被引:645
作者:
Hou, Xingliang
[1
,2
]
Lee, Li Yen Candy
[1
,2
]
Xia, Kuaifei
[1
,2
,3
]
Yen, Yuanyuan
[1
,2
]
Yu, Hao
[1
,2
]
机构:
[1] Natl Univ Singapore, Dept Biol Sci, Singapore 117543, Singapore
[2] Natl Univ Singapore, Temasek Life Sci Lab, Singapore 117543, Singapore
[3] Chinese Acad Sci, S China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China
关键词:
ARABIDOPSIS MESOPHYLL PROTOPLASTS;
PHYTOCHROME INTERACTING FACTOR-3;
FLOWERING TIME GENES;
REGULATED DEFENSE;
PLANT-RESPONSES;
GROWTH;
LIGHT;
PROTEINS;
COI1;
TRANSDUCTION;
D O I:
10.1016/j.devcel.2010.10.024
中图分类号:
Q2 [细胞生物学];
学科分类号:
071009 ;
090102 ;
摘要:
Gibberellins (GAs) modulate jasmonate (JA) signaling, which is essential for stress response and development in plants. However, the molecular details of such phytohormone interaction remain largely unknown. Here, we show that the JA ZIM-domain 1 (JAZ1) protein, a key repressor of JA signaling, interacts in vivo with DELLA proteins, repressors of the GA pathway. DELLAs prevent inhibitory JAZ1 interaction with a key transcriptional activator of JA responses, MYC2, and, thus, enhance the ability of MYC2 to regulate its target genes. Conversely, GA triggers degradation of DELLAs, which allows JAZ1 to bind MYC2 and suppress MYC2-dependent JA-signaling outputs. Therefore, our results reveal one means by which GAs suppress cellular competence to respond to JA. Because DELLAs serve as central regulators that mediate the crosstalk of various phytohormones, our model also suggests a candidate mechanism by which JA signaling may be fine-tuned by other signaling pathways through DELLAs.
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页码:884 / 894
页数:11
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