Identification of sugar transporter MrSTP20 responding to high-salt stress and hexoses induction in apple rootstock (Malus robusta Rehd).

ABSTRACT:

Background

Sugar distribution regulation, especially in the roots, is an important pathway for plants to cope with abiotic stress. Sugar transport proteins (STPs) mediate the transmembrane transport of hexoses such as glucose and fructose; however, the molecular mechanism underlying the response to salt stress remains unclear.

Results

Here, we identified 22 STP genes in apple (Malus domestica) using genome-wide screening. Under salt stress, 17 genes were detected in the roots of the apple rootstock Malus robusta Rehd; of them, MrSTP3, MrSTP7, MrSTP14, and MrSTP20 showed stronger positive responses to salt stress. Under exogenous sugar induction, MrSTP7, MrSTP17, and MrSTP20 were significantly upregulated for all three hexoses (glucose, fructose, and mannose), one sugar alcoh

SUBMITTER: Yan YL 

PROVIDER: S-EPMC12481870 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature