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Glucose Transporters

Glucose Transporters

Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:

Phloem and Sugar Transport

Phloem and Sugar Transport

Like many living organisms, plants have tissues that specialize in specific plant functions. For example, shoots are well adapted to rapid growth, while roots are structured to acquire resources efficiently. However, sugar production is primarily restricted to the photosynthetic cells that reside in the leaves of angiosperm plants. Sugar and other resources are transported from photosynthetic tissues to other specialized tissues by a process called translocation.

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Updated: Jan 18, 2026

A Strategy to Validate the Role of Callose-mediated Plasmodesmal Gating in the Tropic Response

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The Sugar Transporter Gene Family in Colored Calla Lily: Identification, Expression Patterns, and Roles in Soft Rot

Xiaorong Huang^1,2, Zhen Zeng², Yushan Lu^1,2

¹College of Horticultural Science & Technology, Hebei Normal University of Science & Technology, Qinhuangdao 066004, China.

Plants (Basel, Switzerland)

|September 13, 2025

Summary

This study identifies 18 sugar transporter genes in colored calla lily and analyzes their response to bacterial infection. Specific hexose transporters (ZeSTP7, ZeSTP15, ZeSTP17) show altered expression and transport functions, crucial for plant defense.

Keywords:

STP colored calla lily gene family soft rot

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Last Updated: Jan 18, 2026

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Area of Science:

Plant Molecular Biology
Plant Physiology
Genomics

Background:

Sugar transporter proteins are vital for plant growth and nutrient allocation.
Understanding hexose transporters in ornamental plants like colored calla lily (Zantedeschia elliottiana) is crucial for their health and response to pathogens.

Purpose of the Study:

To identify and characterize hexose transporter genes (ZeSTP) in the colored calla lily genome.
To investigate the expression patterns of ZeSTP genes in response to Pectobacterium carotovora subsp. carotovora infection.
To determine the transport characteristics of specific hexose transporters (ZeSTP7, ZeSTP15, ZeSTP17).

Main Methods:

Genome-wide identification and phylogenetic analysis of sugar transporter genes in Z. elliottiana.
Analysis of ZeSTP gene expression levels after P. carotovora subsp. carotovora infection using transcript analysis.
Yeast mutant hexose complementation assays to determine the substrate specificity of ZeSTP7, ZeSTP15, and ZeSTP17.

Main Results:

Identified 18 sugar transporter genes in Z. elliottiana, with most having 12 transmembrane domains.
Phylogenetic analysis revealed five subgroups within the ZeSTP gene family, with tandem gene duplication events observed.
Expression of ZeSTP7, ZeSTP15, and ZeSTP17 significantly increased post-infection; ZeSTP7 transported glucose and galactose, while ZeSTP15 and ZeSTP17 showed limited transport.

Conclusions:

The study provides a comprehensive analysis of the hexose transporter gene family in colored calla lily.
ZeSTP genes play a significant role in the plant's response to soft rot disease caused by P. carotovora subsp. carotovora.
This research lays a foundation for understanding sugar transporter functions in plant-pathogen interactions.