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Plant Science 152 (2000) 1726 Molecular cloning and characterization of OsLRK1 encoding a

Summary: Plant Science 152 (2000) 1726
Molecular cloning and characterization of OsLRK1 encoding a
putative receptor-like protein kinase from Oryza sati6a
Chanhong Kim, Dong-Hoon Jeong, Gynheung An *
Department of Life Science, Pohang Uni6ersity of Science and Technology, Pohang 790-784, South Korea
Received 13 September 1999; received in revised form 15 September 1999; accepted 16 September 1999
A cDNA clone, OsLRK1, encoding a leucine-rich repeat receptor-like protein kinase was isolated from the immature panicles
of rice. The OsLRK1 protein was composed of a leucine-rich extracellular ligand-binding domain, a membrane-spanning segment,
and a cytoplasmic kinase domain. The OsLRK1 protein showed the highest sequence homology with Arabidopsis CLV1. The
OsLRK1 transcript was present at a high level in immature panicles and at a low level in seedling shoots, immature seeds, and
mature seeds, while no expression was detected in seedling roots and panicles at the heading stage. This expression pattern is
similar to that of CLV1, which suggests that the rice clone may play a critical role in meristem development. The function of the
rice OsLRK1 gene was studied by the transgenic approach. Antisense expression of OsLRK1 in rice plants resulted in increased
numbers of flower organs, suggesting that the OsLRK1 gene is involved in floral meristem activity. 2000 Elsevier Science
Ireland Ltd. All rights reserved.
Keywords: Antisense; CLAVATA1; Floral meristem; Leucine-rich repeats; Receptor kinase; Rice transformation
1. Introduction
Plant development requires the integration of


Source: An, Gynheung - Department of Life Science, Pohang University of Science and Technology


Collections: Biotechnology; Biology and Medicine