Abstract

Sucrose is the major carbon form translocated in higher plants, and also works as an important signaling molecule that
regulates genes involved in photosynthesis, metabolism, and developmental processes. Many studies focused on
glucose, normal decomposed product of sucrose, demonstrated that glucose resulted in a delay of germination and an
inhibition of seedling development. In this study, we determined the effects of sucrose on germination kinetics and
seedlings development. Our results indicated that exogenous sucrose didn’t have a similar role to glucose, showed
167mM sucrose delayed the rate of seed germination in wild-ecotype seeds by extending peak time of germination, and
had multiple roles to seedling development. Overhigh concentration of sucrose (333mM) restrained germination and
seedling development seriously. Further experiments of transcript profiles of genes involved in energy and carbohydrate
metabolism indicated that seedlings absorbed and utilized the exogenous sucrose as a priority while reduced the need
for internal source.

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