Inverse pH regulation of plant and fungal sucrose transporters: a mechanism to regulate competition for sucrose at the host/pathogen interface?

ABSTRACT:

Background

Plant sucrose transporter activities were shown to respond to changes in the extracellular pH and redox status, and oxidizing compounds like glutathione (GSSG) or H(2)O(2) were reported to effect the subcellular targeting of these proteins. We hypothesized that changes in both parameters might be used to modulate the activities of competing sucrose transporters at a plant/pathogen interface. We, therefore, compared the effects of redox-active compounds and of extracellular pH on the sucrose transporters UmSRT1 and ZmSUT1 known to compete for extracellular sucrose in the Ustilago maydis (corn smut)/Zea mays (maize) pathosystem.

Methodology/principal findings

We present functional analyses of the U. maydis sucrose transporter UmSRT1 and of the plant sucrose transpor

SUBMITTER: Wippel K 

PROVIDER: S-EPMC2928750 | biostudies-literature | 2010 Aug

REPOSITORIES: biostudies-literature