Freezing Tolerance and Expression of β-amylase Gene in Two Actinidia arguta Cultivars with Seasonal Changes.

ABSTRACT: Low temperature causes injuries to plants during winter, thereby it affects kiwi fruit quality and yield. However, the changes in metabolites and gene expression during cold acclimation (CA) and deacclimation (DA) in kiwi fruit remain largely unknown. In this study, freezing tolerance, carbohydrate metabolism, and β-amylase gene expression in two Actinidia arguta cv. "CJ-1" and "RB-3" were detected from CA to DA stages. In all acclimation stages, the "CJ-1" was hardier than "RB-3" and possessed lower semi-lethal temperature (LT50). Furthermore, "CJ-1" had a more rapid acclimation speed than "RB-3". Changes of starch, β-amylase, and soluble sugars were associated with freezing tolerance in both cultivars. Starch contents continued to follow a declining trend, while soluble sugars contents c

SUBMITTER: Sun S 

PROVIDER: S-EPMC7238411 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature