Physiological responses of Bassia dasyphylla to drought during seed germination from different provenances

IF 2.4 3区环境科学与生态学 Q2 ECOLOGY

Frontiers in Ecology and Evolution Pub Date : 2024-04-22 DOI:10.3389/fevo.2024.1358694

Juanli Chen, Yongqing Luo, Xueyong Zhao, Yan Li, Biao Gao, Ruolan Wang, Yuanxin Lou, Junpeng Mu

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Abstract

Bassia dasyphylla is a prevalent herbaceous plant that exhibits enhanced resilience to dryness and elevated temperatures. It is frequently found in dispersed or grouped formation on sandy soil within steppe, semi-desert, and desert regions. Herein, we conducted experiments to examine the growth and physiological traits of B. dasyphylla seeds originated from various regions in response to water scarcity. The study seeks to investigate the ability of these seeds to germinate under drought conditions and offer valuable insights for the development and breeding of high-quality germplasm resources in Inner Mongolia. The results demonstrated that B. dasyphylla originating from desert steppe (DS) exhibited a greater capacity to endure drought conditions in comparison to its counterparts from sandy land (SL). At a water potential of -0.30 MPa, the Seed germination rate from DS was 33.3%, while from SL it was 22.7%. With the increase in drought duration and intensity, germination rate, plumule length, both single-seed weight (SSW) and seed water content (SWC) of B. dasyphylla declined. The protective enzyme activity exhibited an initial increase, followed by a subsequent decline as the duration of the drought increased. Notably, we found that the protective enzyme activity from DS was higher than that from SL. During the initial and intermediate stages of dryness, the soluble sugar and protein of the plant from DS effectively inhibited the peroxidation of membrane lipids, whereas the osmoregulatory properties from SL did not have a significant impact. The findings suggest that the ability of B. dasyphylla to withstand drought conditions in DS can be attributed to its elevated amounts of protective enzymes and osmoregulatory factors, which serve to safeguard the cell membrane during periods of drought.

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不同产地的旱金莲种子萌发过程中对干旱的生理反应

旱伞草（Bassia dasyphylla）是一种常见的草本植物，对干燥和高温有很强的适应能力。它经常在草原、半荒漠和沙漠地区的沙质土壤上分散或群生。在此，我们进行了实验，研究来自不同地区的 B. dasyphylla 种子在缺水情况下的生长和生理特性。该研究旨在探讨这些种子在干旱条件下的萌发能力，为内蒙古优质种质资源的开发和培育提供有价值的见解。研究结果表明，与沙地（SL）的B. dasyphylla相比，沙漠草原（DS）的B. dasyphylla表现出更强的抗旱能力。在水势为-0.30兆帕时，沙漠草原种子发芽率为33.3%，而沙地种子发芽率为22.7%。随着干旱持续时间和强度的增加，B. dasyphylla 的发芽率、胚珠长度、单粒种子重量（SSW）和种子含水量（SWC）都有所下降。随着干旱持续时间的延长，保护酶活性表现出最初的上升，随后出现下降。值得注意的是，我们发现 DS 的保护酶活性高于 SL。在干旱的初期和中期阶段，DS 植物的可溶性糖和蛋白质能有效抑制膜脂的过氧化反应，而 SL 植物的渗透调节特性则没有显著影响。研究结果表明，在 DS 中，B. dasyphylla 能够抵御干旱条件，这可能是由于其保护性酶和渗透调节因子的数量增加，在干旱期间起到了保护细胞膜的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Frontiers in Ecology and Evolution Environmental Science-Ecology

CiteScore

4.00

自引率

6.70%

发文量

1143

审稿时长

12 weeks

期刊介绍： Frontiers in Ecology and Evolution publishes rigorously peer-reviewed research across fundamental and applied sciences, to provide ecological and evolutionary insights into our natural and anthropogenic world, and how it should best be managed. Field Chief Editor Mark A. Elgar at the University of Melbourne is supported by an outstanding Editorial Board of international researchers. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics and the public worldwide. Eminent biologist and theist Theodosius Dobzhansky’s astute observation that “Nothing in biology makes sense except in the light of evolution” has arguably even broader relevance now than when it was first penned in The American Biology Teacher in 1973. One could similarly argue that not much in evolution makes sense without recourse to ecological concepts: understanding diversity — from microbial adaptations to species assemblages — requires insights from both ecological and evolutionary disciplines. Nowadays, technological developments from other fields allow us to address unprecedented ecological and evolutionary questions of astonishing detail, impressive breadth and compelling inference. The specialty sections of Frontiers in Ecology and Evolution will publish, under a single platform, contemporary, rigorous research, reviews, opinions, and commentaries that cover the spectrum of ecological and evolutionary inquiry, both fundamental and applied. Articles are peer-reviewed according to the Frontiers review guidelines, which evaluate manuscripts on objective editorial criteria. Through this unique, Frontiers platform for open-access publishing and research networking, Frontiers in Ecology and Evolution aims to provide colleagues and the broader community with ecological and evolutionary insights into our natural and anthropogenic world, and how it might best be managed.