A cytokinin perception mutant colonized by Rhizobium in the absence of nodule organogenesis

Jeremy D. Murray, Bogumil J. Karas, Shusei Sato, Satoshi Tabata, Lisa Amyot, Krzysztof Szczyglowski

Research output: Contribution to journalArticlepeer-review

332 Citations (Scopus)

Abstract

In legumes, Nod-factor signaling by rhizobia initiates the development of the nitrogen-fixing nodule symbiosis, but the direct cell division stimulus that brings about nodule primordia inception in the root cortex remains obscure. We showed that Lotus japonicus plants homozygous for a mutation in the HYPERINFECTED 1 (HIT1) locus exhibit abundant infection-thread formation but fail to initiate timely cortical cell divisions in response to rhizobial signaling. We demonstrated that the corresponding gene encodes a cytokinin receptor that is required for the activation of the nodule inception regulator Nin and nodule organogenesis.

Original languageEnglish
Pages (from-to)101-104
Number of pages4
JournalScience
Volume315
Issue number5808
DOIs
Publication statusPublished - 2007 Jan 5
Externally publishedYes

ASJC Scopus subject areas

  • General

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