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Functional Plant Biology Functional Plant Biology Society
Plant function and evolutionary biology
RESEARCH ARTICLE

Variation in cell wall structure and composition of wheat grain based on geography and regulatory effect of cell wall on water mobility

Xiaoquan Gao https://orcid.org/0000-0001-9273-9731 A , Ruifeng Ying A B , Dan Zhao A and Jiewei Zhu A
+ Author Affiliations
- Author Affiliations

A Department of Food Science and Technology, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China.

B Corresponding author. Email: yingruifeng@hotmail.com

Functional Plant Biology 47(9) 840-852 https://doi.org/10.1071/FP19302
Submitted: 21 October 2019  Accepted: 8 April 2020   Published: 15 June 2020

Abstract

Wheat grain from 12 different regions in China was used to study variations in the cell wall structure and chemical composition based on geography. The mobility and migration rate of water in wheat grain during moisture absorption and drying were determined under different relative humidity conditions. Depending on the geography, variations were noted in the thickness and component content of the wheat grain cell wall. Cell wall thickness was positively correlated with the total arabinoxylan (TAX) content. Cell wall thickness and TAX content of the aleurone layer were positively correlated with altitude and negatively correlated with longitude. The water migration rate decreased with the increase of cell wall thickness and TAX content. Nuclear magnetic resonance (NMR) results revealed that grains with thick aleurone cell wall showed increased molecular mobility of water. These findings lay the foundation for further study of water regulation in wheat cell wall.

Additional keywords: aleurone, arabinoxylan, β-glucans, NMR, nuclear magnetic resonance, regions.


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