Functional Analysis of MAX2 in Phototropins-Mediated Cotyledon Flattening in .

Phototropins (phot1 and phot2) are blue-light receptors that control cotyledon flattening and positioning under strong light; however, their functional redundancy restricts our understanding of the specific roles of phot2. To identify the factors responsible for phot2-dependent cotyledon flattening and growth, we screened for light-insensitive mutants among mutagenized mutants in . The double mutant (), which is defective in cotyledon flattening and positioning but not the phototropic response was selected.