Abstract
BOP1 gene is thought to regulate meristematic activities in leaf primordium of Arabidopsis thaliana, since bop1-1 mutant exhibits indeterminate growth of leaf blade. To understand regulation mechanism of determinate leaf growth by the BOP1, bop1-1 mutation was introduced into yab3/fil mutant, which has defect in establishment of dorsoventrality in leaves. The triple mutant did not exhibit indeterminate growth of leaf, suggesting that the indeterminate growth of leaf in bop1-1 depends on establishment of dorsoventrality. KNAT1, a class I KNOX, is also considered to be involved in determinate nature of leaf growth. When 35S::KNAT1 was introduced to bop1-1 mutant, leaflet-like structures were repeatedly produced on a leaf. This result suggests that BOP1 regulates determinate growth of leaf blade, while KNAT1 permits repeated morphogenesis.
Some plants exhibit indeterminate leaf morphogenesis like the bop1-1 mutant. We will also show results of our analyses on homologs of BOP1 isolated from such plant species.
