Morphology, Composition, and Structure of Starches During Sorghum Seed Development

IF 2.2 4区农林科学 Q3 CHEMISTRY, APPLIED

Cereal Chemistry Pub Date : 2025-03-03 DOI:10.1002/cche.10875

Dongxing Li, Yinping Jiao, Xiaorong Wu, Scott R. Bean, Yong-Cheng Shi

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引用次数: 0

Abstract

Background and Objectives

Fundamentally it is important to understand starch granule initiation and deposition of starch molecules during the growth of granules. The objective of this study was to investigate the morphology, composition, and structure of starches in sorghum from fifth day post-anthesis (DPA) until the maturity (25 DPA).

Findings

The minimal size of sorghum starch for showing Maltese cross was 4 µm. The average size of starches on 5 DPA was 3.2 µm, and most starches did not exhibit Maltese cross. Amylose content was low (13.0%) on 5 DPA and increased to 31% on 25 DPA. The size of amylose was long with a peak at DP 1771 on 5 DPA and changed during the starch biosynthesis. The short-chain amylopectin proportion significantly increased on 25 DPA.

Conclusions

The low amylose content and high proportion of long-chain amylose might be favorable for the initial sorghum starch formation. The starch polymers were less radially oriented in the primary starches. Amylopectin in the periphery of a large sorghum starch was more branched than that of the inner part.

Significance and Novelty

The variations in the amylose length distributions and orientation of starch polymers provide new information on starch biosynthesis.

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高粱种子发育过程中淀粉的形态、组成和结构

背景与目的从根本上了解淀粉颗粒的形成和淀粉分子在颗粒生长过程中的沉积是非常重要的。本研究的目的是研究高粱开花后第5天（DPA）至成熟（25 DPA）期间淀粉的形态、组成和结构。高粱淀粉显示马耳他杂交的最小尺寸为4µm。淀粉在5 DPA上的平均粒径为3.2µm，大部分淀粉不表现马尔氏交叉。直链淀粉含量在5 DPA时较低（13.0%），在25 DPA时增加到31%。直链淀粉的大小较长，在5 DPA的DP 1771处达到峰值，并在淀粉生物合成过程中发生变化。短链支链淀粉比例在25 DPA时显著增加。结论低直链淀粉含量和高比例的长链直链淀粉可能有利于高粱初始淀粉的形成。淀粉聚合物在原淀粉中径向取向较少。大粒高粱淀粉外围的支链淀粉比内部的支链淀粉分枝更多。淀粉聚合物直链淀粉长度分布和取向的变化为淀粉生物合成提供了新的信息。

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来源期刊

Cereal Chemistry 工程技术-食品科技

CiteScore

5.10

自引率

8.30%

发文量

110

审稿时长

3 months

期刊介绍： Cereal Chemistry publishes high-quality papers reporting novel research and significant conceptual advances in genetics, biotechnology, composition, processing, and utilization of cereal grains (barley, maize, millet, oats, rice, rye, sorghum, triticale, and wheat), pulses (beans, lentils, peas, etc.), oilseeds, and specialty crops (amaranth, flax, quinoa, etc.). Papers advancing grain science in relation to health, nutrition, pet and animal food, and safety, along with new methodologies, instrumentation, and analysis relating to these areas are welcome, as are research notes and topical review papers. The journal generally does not accept papers that focus on nongrain ingredients, technology of a commercial or proprietary nature, or that confirm previous research without extending knowledge. Papers that describe product development should include discussion of underlying theoretical principles.