Os03g0790600
The rice gene Os03g0790600 was reported as PLASTOCHRON3 (PLA3)/GOLIATH (GO) in 2009[1].
Contents
Annotated Information
Function
- PLASTOCHRON3 (PLA3)/ GOLIATH (GO) regulates various developmental processes including the rate of leaf initiation (the plastochron). PLA3/GO encodes a glutamate carboxypeptidase, which is thought to catabolize small acidic peptides and produce small signaling molecules.
Mutation
- Two recessive mutations, pla3-1 and pla3-2, caused pleiotropic phenotypes including a shortened plastochron (Figures 1a). Mature embryos of pla3/go mutants were significantly larger than those of wild type (Figure 1b–e). All of the embryonic organs were enlarged, including scutellum, plumule, radicle and epiblast (Figure 1d,e). The patterning and positioning of the organs were not disturbed. In pla3-3 (go-1) and pla3-4 (go-2), two radicles were occasionally formed (Figure 1h). In addition, four foliage leaves were differentiated in pla3 embryos in contrast to three leaves in wild-type embryos (Figure 1f,g). The overproduction of leaves could be due to a reduced dormancy, because pla3 seeds frequently showed vivipary (Figure 1i–k).
Figure 1. Seedlings and embryos of wild type and pla mutants. (a) Seedlings of wild type, pla1-4, pla2-1 and pla3-1 at 3 weeks after germination. (b, d, f, i) Wild type. (c, e, g, h, j, k) pla3. (b, d) Mature seeds. The embryo of pla3 is markedly larger than that of wild type. (d–g) Longitudinal sections of mature embryos. (f, g) Close-up views of the area within the red square in (d and e), respectively. In the wild type, three foliage leaves are formed, in contrast, four foliage leaves are present in pla3. Parts are numbered in order of initiation. (i, j) Top views of a dormant embryo of wild type (i) and a viviparous one of pla3 (j). (k) Viviparous seed of pla3. Bar = 5 cm in (a), 2.5 mm in (b and c), 200 lm in (d–g), 500 lm in (h), 1 mm in (i and j) and 2 mm in (k). [1].
Expression
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Evolution
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Labs working on this gene
- Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo 113-8657, Japan,
- DuPont Crop Genetics Research, Experimental Station, PO Box 80353, Wilmington, DE 19880-0353, USA, and
- RIKEN Plant Science Center, Tsurumi, Yokohama 230-0045, Japan
References
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