The plastidial α-glucan phosphorylase modulates maltodextrin metabolism and affects starch parameters in Arabidopsis thaliana.

ABSTRACT: The plastidial α-glucan phosphorylase (PHS1) can catalyze the elongation and degradation of glucans, but its exact physiological role in plants is not completely deciphered. Many studies have indicated that PHS1 is involved in transitory starch turnover both in photosynthetic tissues and reserve starch accumulation in sink organs, by exerting its effects on the plastidial maltodextrin pools. Recent studies have also established its role in the mobilization of short maltooligosaccharides, thereby assisting in starch granule initiation. Here we report findings from studying four constitutive double knockout mutants related to plastidial maltodextrin metabolism, namely phs1dpe1, phs1ptst2, phs1pgm1, and phs1isa3 of Arabidopsis thaliana. We observed different effects on carbon partitioning in

SUBMITTER: Singh A 

PROVIDER: S-EPMC12116187 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature