Reference - Detail
RRC ID | 30976 |
---|---|
Author | Shigeyama T, Tominaga A, Arima S, Sakai T, Inada S, Jikumaru Y, Kamiya Y, Uchiumi T, Abe M, Hashiguchi M, Akashi R, Hirsch AM, Suzuki A. |
Title | Additional cause for reduced JA-Ile in the root of a Lotus japonicus phyB mutant. |
Journal | Plant Signal Behav |
Abstract |
Light is critical for supplying carbon for use in the energetically expensive process of nitrogen-fixing symbiosis between legumes and rhizobia. We recently showed that root nodule formation in phyB mutants [which have a constitutive shade avoidance syndrome (SAS) phenotype] was suppressed in white light, and that nodulation in wild-type is controlled by sensing the R/FR ratio through jasmonic acid (JA) signaling. We concluded that the cause of reduced root nodule formation in phyB mutants was the inhibition of JA-Ile production in root. Here we show that the shoot JA-Ile level of phyB mutants is higher than that of the wild-type strain MG20, suggesting that translocation of JA-Ile from shoot to root is impeded in the mutant. These results indicate that root nodule formation in phyB mutants is suppressed both by decreased JA-Ile production, caused by reduced JAR1 activity in root, and by reduced JA-Ile translocation from shoot to root. |
Volume | 7(7) |
Pages | 746-8 |
Published | 2012-7-1 |
DOI | 10.4161/psb.20407 |
PII | 20407 |
PMID | 22751318 |
PMC | PMC3583954 |
MeSH | Cyclopentanes / metabolism* Gene Expression Regulation, Plant Genes, Plant / genetics Isoleucine / analogs & derivatives* Isoleucine / metabolism Light Lotus / genetics Lotus / growth & development Lotus / metabolism* Lotus / radiation effects Mutation / genetics* Oxylipins / metabolism Phytochrome B / genetics* Plant Proteins / genetics Plant Proteins / metabolism Plant Roots / metabolism* Plant Roots / radiation effects Plant Shoots / metabolism Plant Shoots / radiation effects |
IF | 1.671 |
Times Cited | 4 |
Resource | |
Lotus / Glycine | Miyakojima MG-20 |