Effects of Drought Stress on Seed Ultrastructure and Endogenous Hormones of Allium polyrhizum

doi:10.11733/j.issn.1007-0435.2025.07.007

Acta Agrestia Sinica ›› 2025, Vol. 33 ›› Issue (7): 2114-2122.DOI: 10.11733/j.issn.1007-0435.2025.07.007

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Effects of Drought Stress on Seed Ultrastructure and Endogenous Hormones of Allium polyrhizum

JIANG Qing-xue^1,2, BAO Xiu-xia³, YIN Guo-mei¹, ZHANG Zhi-peng², WANG Xue-min², LIAN Yong¹

1. Inner Mongolia Autonomous Region Academy of Agriculture and Animal Husbandry, Hohhot, Inner Mongolia 010031, China;
2. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
3. School of Chemistry and Environmental Engineering, Hohhot Nationality College, Hohhot, Inner Mongolia 010051, China

Received:2024-07-10 Revised:2024-09-03 Online:2025-07-15 Published:2025-07-18

干旱胁迫对多根葱种子超微结构及内源激素的影响

蒋庆雪^1,2, 包秀霞³, 殷国梅¹, 张志鹏², 王学敏², 廉勇¹

1. 内蒙古自治区农牧业科学院, 内蒙古呼和浩特 010031;
2. 中国农业科学院北京畜牧兽医研究所, 北京 100193;
3. 呼和浩特民族学院化学与环境工程学院, 内蒙古呼和浩特 010051

通讯作者: 王学敏,E-mail:wangxuemin@caas.cn;廉勇,E-mail:lianyongnmg@sina.com
作者简介:蒋庆雪（2000-），女，汉族，黑龙江佳木斯人，硕士研究生，主要从事饲草遗传育种与种子科学研究，E-mail：18511590877@163.com
基金资助:
中央引导地方科技发展资金项目（2021ZY0029）；国家作物种质资源库（NCGRC-63）资助

Abstract

Abstract: This study investigated the effects of drought stress simulated by different concentrations of polyethylene glycol （PEG-6000） on seed germination characteristics， ultrastructure， and endogenous hormone contents in Allium polyrhizum from the desert steppe of Inner Mongolia. The results showed that under 10% PEG-6000 treatment， the seed coat meshwork of A. polyrhizum was loosely arranged， with irregular edges， but the germination rate showed no significant difference compared to the control group. When the PEG concentration increased to 20%， structural damage to the seed coat was intensified， leading to a significant reduction in germination rate （P<0.05）. High-concentration PEG caused a notable decrease in the growth-promoting hormone indole-3-acetic acid （IAA）， while stress-responsive hormones such as abscisic acid （ABA）， jasmonic acid （JA）， and salicylic acid （SA） significantly increased. These findings indicate that A. polyrhizum can adapt to drought stress during the seed germination phase by modulating the balance of endogenous hormones.

Key words: Allium polyrhizum, Seed, Germination, Drought stress, Endogenous hormones, Ultrastructure

摘要： 本研究以内蒙古荒漠草原多根葱（Allium polyrhizum）为研究对象，采用不同浓度聚乙二醇（Polyethylene glycol，PEG-6000）模拟干旱胁迫，探究其对种子萌发特性、超微结构及内源激素含量的影响。结果表明：10% PEG-6000处理下，多根葱种子种皮网格间排列疏松，边缘呈现不规则形态，但发芽率与对照组无显著差异；当处理浓度升高至20%时，种皮结构损伤加剧，种子萌发率显著下降（P<0.05）。高浓度干旱胁迫导致促生长激素吲哚-3-乙酸（Indole-3-acetic acid，IAA）含量显著降低，而逆境响应激素脱落酸（Abscisic acid，ABA）、茉莉酸（Jasmonic acid，JA）及水杨酸（Salicylic acid，SA）含量显著上升，表明多根葱通过调节内源激素的平衡抵御干旱胁迫，从而适应种子萌发期的环境变化。

关键词: 多根葱, 种子, 萌发, 干旱胁迫, 内源激素, 超微结构

CLC Number:

Q945.78

JIANG Qing-xue, BAO Xiu-xia, YIN Guo-mei, ZHANG Zhi-peng, WANG Xue-min, LIAN Yong. Effects of Drought Stress on Seed Ultrastructure and Endogenous Hormones of Allium polyrhizum[J]. Acta Agrestia Sinica, 2025, 33(7): 2114-2122.

蒋庆雪, 包秀霞, 殷国梅, 张志鹏, 王学敏, 廉勇. 干旱胁迫对多根葱种子超微结构及内源激素的影响[J]. 草地学报, 2025, 33(7): 2114-2122.

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Effects of Drought Stress on Seed Ultrastructure and Endogenous Hormones of Allium polyrhizum

干旱胁迫对多根葱种子超微结构及内源激素的影响

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