期刊
PLANT SIGNALING & BEHAVIOR
卷 10, 期 5, 页码 -出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15592324.2014.1000138
关键词
grafting; HAR1; long-distance signaling; nitrate; nodule; CLV1; CLAVATA1; CLE; CLAVATA3; ESR-related; HAR1; HYPERNODULATION ABERRANT ROOT FORMATION1; LRR-RK; Leucine-rich repeat receptor kinase; NARK; NODULE AUTOREGULATION RECEPTOR KINASE; SUNN; SUPER NUMERIC NODULES
资金
- Japan Society for the Promotion of Science [A2406127]
- MEXT [22128006]
- Grants-in-Aid for Scientific Research [22128006] Funding Source: KAKEN
Nitrate is a major environmental factor in the inhibition of nodulation. In a model legume Lotus japonicus, a CLV1-like receptor kinase, HAR1, mediates nitrate inhibition and autoregulation of nodulation. Autoregulation of nodulation involves root-to-shoot-to-root long-distance communication, and HAR1 functions in shoots. However, it remains elusive where HAR1 functions in the nitrate inhibition of nodulation. We performed grafting experiments with the har1 mutant under various nitrate conditions, and found that shoot HAR1 is critical for the inhibition of nodulation at 10mM nitrate. Combined with our recent finding that the nitrate-induced CLE-RS2 glycopeptide binds directly to the HAR1 receptor, this result suggests that CLE-RS2/HAR1 long-distance signaling plays an important role in the both nitrate inhibition and the autoregulation of nodulation.
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