干旱脅迫對多根蔥種子超微結構及內源激素的影響
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中圖分類號：Q945.78 文獻標識碼：A 文章編號：1007-0435（2025）07-2114-09
doi：10.11733/j.issn.1007-0435.2025.07.007
引用格式：，等.干旱脅迫對多根蔥種子超微結構及內源激素的影響[J].草地學報，2025，33（7）：2114 —2122 JIANG Qing-xue，BAO Xiu-xia，YIN Guo-mei，et al. Efects of Drought Stresson Seed Ultrastructure and Endog enous Hormones of Alium polyrhizum[J].Acta Agrestia Sinica，2025，33（7） ：2114-2122
Effects of Drought Stress on Seed Ultrastructure and Endogenous Hormonesof Allium polyrhizum
JIANG Qing-xue 1，2 ，BAO Xiu-xia3，YIN Guo-mei1， ZHANG Zhi-peng2，WANG Xue- ?min2* ， LIAN Yong1*
（1.InerMongoliatoouegiocadefAiureandialubandryot，erogolinite ofAnimal Science，ChineseAcademyofAgriculturalSciences，BeijinglOol93，China；3.SchoolofChemistryandEnviomental Engineering，HohhotNationality College，Hohhot，Inner Mongolia O1oo51，China）
Abstract：This study investigated the effects of drought stressimulated by diferent concentrations of polyethylene glycol（PEG-6ooO）on seed germination characteristics，ultrastructure，and endogenous hormone contents in A llium polyrhizum from the desert steppe of Inner Mongolia. The results showed that under 10% PEG6000 treatment，the seed coat meshwork of A . polyrhizum was loosely arranged，with irregular edges，but the germination rate showed no significant diference 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 stres-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
多根蔥（Alliumpolyrhizum）是百合科蔥屬多年生旱生植物，其鱗莖外圍包被一層厚實的枯死鱗莖皮，形成地表防護層，防旱和隔熱，以減少鱗莖根系曝曬和水分蒸發(fā)[1。（剩余11907字）