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The hexose transporters CsHT3 and CsHT16 regulate postphloem transport and fruit development in cucumber
Jintao Cheng1, Suying Wen1, Kexin Li1
1National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, Hubei Province, China.
Plant Physiology
|December 16, 2024
Summary
Cucumber hexose transporters CsHT3, CsHT12, and CsHT16 are key to fruit growth. These symporters regulate sugar and phytohormone balance, impacting cucumber fruit size and development.
Area of Science:
- Plant Physiology
- Molecular Biology
- Agricultural Science
Background:
- Hexoses are vital for plant growth and fruit development.
- The specific roles of hexose/H+ symporters in fruit sugar transport and homeostasis are not fully understood.
Purpose of the Study:
- To investigate the functions of hexose/H+ symporters in cucumber fruit development.
- To analyze tissue-specific expression, localization, transport, and physiological roles of these transporters.
Main Methods:
- Comprehensive expression and localization analyses in cucumber fruits.
- Transport characteristic studies and physiological function assessments.
- Generation and analysis of CsHT16 knockout mutants and CsHT3 overexpression lines.
Main Results:
- CsHT3, CsHT12, and CsHT16 identified as primary hexose/H+ symporters in cucumber fruits.
- Expression patterns of CsHT3 and CsHT16 shift during fruit development, affecting phloem transport.
- Mutant and overexpression studies reveal CsHT16's role in sugar homeostasis and CsHT3/12/16's collective role in fruit enlargement.
Conclusions:
- CsHT16 is crucial for maintaining sugar homeostasis and fruit shape.
- CsHT3, CsHT12, and CsHT16 collectively regulate carbohydrate supply for cucumber fruit growth.
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