RRC ID 30976
著者 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.
タイトル Additional cause for reduced JA-Ile in the root of a Lotus japonicus phyB mutant.
ジャーナル 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.
巻・号 7(7)
ページ 746-8
公開日 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
引用数 4
リソース情報
ミヤコグサ・ダイズ Miyakojima MG-20