Leaf color variation mechanism of the yellow-to-green mutant '<i>ytg-2</i>' in <i>Phaseolus vulgaris</i> L.

ABSTRACT: Snap bean leaves are the primary site of photosynthesis. Mutant leaf color provides valuable tools for investigating leaf color changes, their role in photosynthesis, and pigment metabolic pathways. In this study, we found that the seedling leaves of 'ytg-2' exhibited a yellow phenotype characterized by reduced chlorophyll content compared with 'A18'. Blockage of the uroporphyrinogen III (Urogen III) to the fecal porphyrinogen III (Coprogen III) synthesis pathway primarily affected the synthesis of chlorophyll intermediate metabolites. As the plants matured, their leaves transformed from yellow to light green, accompanied by an increase in the total chlorophyll content. Transcriptome analysis revealed that the significantly down-regulated expression of four genes in the HemE gene fa

SUBMITTER: Wang Z 

PROVIDER: S-EPMC12457786 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature