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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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Leaf shape is controlled early on by initiation at the shoot apical meristem (SAM), as well as by changes in the rates and planes of cell division and the polarity-dependent differentiation of leaf cells. To elucidate the regulation of this differentiation by signal(s) from the SAM, we screened for mutations in genes that might be involved in these early processes. A novel recessive mutant, 356-2 [identified as a new allele of the $\underline{d}eformed\;\underline{r}oot\;and\;\underline{l}eaf1$ (drl1) mutant], was isolated from a collection of Ds transposon insertion lines. The 356-2/drl1-101 mutant produces narrow, filamentous leaves and defective meristems. Its palisade cells have a spongy cell-like structure and are fewer in number, indicating that the leaves are abaxialized. Interestingly, some of those filament-like leaves have no vascular tissues inside their blades. DRL1 encodes a protein similar to the yeast elongator-associated protein (EAP) KTl12. The amino acid sequence of DRL1 is universally conserved in prokaryotes and eukaryotes. These facts suggest that DRL1 might positively regulate leaf polarity and SAM activity by controlling cell proliferation and differentiation.
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