Os01g0866400

The rice Os01g0866400 was reported as OsMOC2 in 2013 ^[1] by researchers from Japan.

Annotated Information

Figure 1. Phenotype analysis of the moc2 mutant.^[1].

The moc2 mutant was isolated for its monoculm phenotype from a pool of mutant lines produced by regeneration of cultured rice cells likely as the Tos17 rice mutants (Miyao et al. 2003). The moc2 mutant phenotype includes reduced tiller numbers, and most plants are composed of a single culm (Figure 1A).
Thus, this phenotype represents a kind of monoculm mutant. When the mutant plants were grown under high-temperature conditions in the summer, they sometimes produced second tillers (Figure 1A). However, the plants usually grew with a single culm until the reproductive stage. The average number of tillers in this mutant was 1.1, whereas it is 8.4 in the wild-type plant (Figure 1B).
Compared with the wild-type plant, the moc2 mutant showed reduced plant height and shoot length. The decelerated growth rate of the moc2 mutant was evident 10 days after germination and thereafter, resulting in a dwarf phenotype (Figure 1C). Significant differences were detected in the color and size of all the leaves of the moc2 mutant compared with those of the wild-type plant.
The moc2 plant produced pale-green leaves, whose lengths and widths were less than two thirds of the wild-type ones (Figure 1D).

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Department of Biological Science and Technology, Tokyo University of Science, Noda 278-8510, Japan
Research Institute of Science and Technology, Tokyo University of Science, Noda 278-8510, Japan
National Institute of Agrobiological Sciences, Tsukuba 305-8602, Japan

↑ ^1.0 ^1.1 Koumoto, Takemasa, et al. "Rice monoculm mutation moc2, which inhibits outgrowth of the second tillers, is ascribed to lack of a fructose-1, 6-bisphosphatase." Plant Biotechnology 30.1 (2013): 47-56.