PMID: 16622320Apr 20, 2006Paper

Isolation and expression patterns of LATERAL ORGAN BOUNDARIES-like genes in Lotus japonicus

Zhi wu sheng li yu fen zi sheng wu xue xue bao = Journal of plant physiology and molecular biology
Jiang-hong LuoDa Luo

Abstract

A shoot apical meristem (SAM) is composed of several distinct domains and lateral organs are initiated at the peripheral zone during plant development. Establishment and maintenance of boundary between SAM and lateral organs is an important developmental process, in which many regulators are involved. LATERAL ORGAN BOUNDARIES (LOB) in Arabidopsis, displaying a specific expression pattern corresponding to the boundary of developmental lateral organs, belongs to a large gene family--LOB domain gene family, which encode proteins with a conserved LOB domain at the N-terminus. Beside LOB, other members of this gene family are also involved in divergent developmental processes in Arabidopsis. To investigate the functions of LOB-like genes in the distantly related legumes, we isolated LjLOBs from a model legume plant Lotus japonicus, and conducted RNA in situ hybridization to investigate their expression patterns. It was found that LjLOB1 and LjLOB3 were strongly expressed at the bases of leaflet primordia, which coincided with the boundaries between leaflet primordia and compound leaf meristem, while LjLOB4 was expressed at the boundaries between whorls in the developing floral bud. The different special expression patterns of LjLOBs...Continue Reading

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