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A Simple Dry Sectioning Method for Obtaining Whole-Seed-Sized Resin Section and Its Applications

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Structural development of aleurone and its function in common wheat.

Fei Xiong¹, Xu-Run Yu, Liang Zhou

¹Key Laboratories of Crop Genetics and Physiology of the Jiangsu Province and Plant Functional Genomics of the Ministry of Education, College of Bioscience and Biotechnology, Yangzhou University, Weihuidong Road 12, Yangzhou, 225009, China, feixiong@yzu.edu.cn.

Molecular Biology Reports

|September 24, 2013

Summary

This summary is machine-generated.

Wheat aleurone cells (ACs) develop through five distinct stages, varying in structure and function based on location and wheat variety. These cells remain alive, storing lipids and minerals, unlike inner endosperm cells.

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Area of Science:

Plant Biology
Cell Biology
Agricultural Science

Background:

The wheat aleurone layer, derived from endosperm cells, plays a crucial role in caryopsis development and function.
Understanding aleurone cell (AC) biogenesis, structure, and physiology is key to comprehending wheat grain quality.

Purpose of the Study:

To characterize the developmental stages of wheat aleurone cells (ACs).
To investigate structural and physiological differences in ACs based on location within the caryopsis and wheat variety.
To elucidate the distinct storage functions of ACs compared to inner endosperm cells (IECs).

Main Methods:

Wheat caryopses at various developmental stages were analyzed using light microscopy, scanning electron microscopy, and fluorescence microscopy.
Aleurone cell (AC) development was categorized into five distinct stages: endosperm cellulization, spherosome formation, aleurone grain formation, filling material proliferation, and maturation.
Comparative analysis of ACs from different caryopsis regions and wheat varieties (hard vs. soft wheat) was performed.

Main Results:

AC development was classified into five stages, with variations observed in AC structure, shape, and development speed depending on location (e.g., near vascular bundles, backside, abdomen).
Significant differences in AC morphology and storage material accumulation were noted between hard and soft wheat varieties.
ACs exhibited higher concentrations of minerals (Na, Mg, Si, P, K) and stored lipids/minerals in spherosomes and aleurone grains, remaining alive during maturation, unlike the dead IECs.

Conclusions:

Wheat aleurone cell development is a complex process with distinct stages and significant variability.
Location within the caryopsis and wheat variety profoundly influence AC structure, development, and storage composition.
Wheat aleurone cells possess unique structural and physiological characteristics, contributing at least four major functions to the grain, distinct from inner endosperm cells.