Exogenous Spermidine Promotes Germination of Aged Sorghum Seeds by Mediating Sugar Metabolism.

ABSTRACT: Starch, a substance stored in seeds, is the main source of energy for germination in sorghum seeds. However, as the seeds age, the catabolism of seed starch is affected, thereby seriously damaging germination ability. In this study, we aimed to understand how exogenous spermidine promoted germination in aged sorghum seed. Our phenotypic analysis indicated that exogenous spermidine not only significantly improved the germination rate, germination potential, germination index, and vigor index of aged seeds, but also increased the root and shoot length after germination. Further, physiological analysis showed that exogenous spermidine increased the content of soluble sugar by upregulating the activity of amylase and sucrose invertase. Exogenous spermidine also improved the activities of key e

SUBMITTER: Zhang M 

PROVIDER: S-EPMC9657371 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature