酒花种质耐盐碱性评价及其对盐碱胁迫的形态生理响应。

IF 3.6 2区 生物学 Q1 PLANT SCIENCES
Siyao Chen, Yanjie Li, Wenlong Zhang, Huizhen Shen, Siyu Wang, Rui Wang, Haiyan Li
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引用次数: 0

摘要

土壤盐渍化是一种严重的影响植物生长发育的非生物胁迫,导致植物早熟,产量和品质下降。本研究通过150 mmol·L-1 (pH = 9.0)的盐碱胁迫,对170份酒花(Oenothera L.)种质的耐盐性进行了评价。对发芽参数进行分析,并采用综合评价方法对其萌发期耐受性进行评价。在170份种质中,鉴定出耐盐碱12份,敏感盐碱34份。随后,对23份材料进行了苗期耐盐碱性评价。虽然所有样品的幼苗生长都受到抑制,但通过综合评价方法最终选择了5个耐盐碱种质。我们进一步检测了光合色素水平、膜通透性、抗氧化氧化酶、渗透调节因子和矿物质含量,以确定植物的反应。具有较高耐受性的种质可以通过(i)维持或增加叶绿素含量和延缓叶片衰老来适应盐碱胁迫,(ii)通过维持稳定的渗透电位来利用渗透调节,(iii)保持相对稳定的电导率,(iv)增强抗氧化系统并维持相对低水平的丙二醛,(v)通过促进Ca2+, Mg2+的积累来利用离子调节。确保叶片中K+/Na+、Ca2+/Na+和Mg2+/Na+的较高比率。这些研究结果可为进一步研究野茶树耐盐碱的遗传机制提供有价值的参考,并为野茶树种质资源的保护、遗传改良及在盐碱环境下的应用提供依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of Saline-Alkali Tolerance of Oenothera L. Germplasms and Their Morpho-Physiological Responses to Saline-Alkali Stress.

Soil salinization is a severe abiotic stress that affects plant growth and development, leading to accelerated maturity and decreased production and quality. In the present study, we evaluated 170 Oenothera L. germplasms for saline-alkali tolerance by subjecting them to 150 mmol·L-1 saline-alkali stress (pH = 9.0). Germination parameters were analyzed, and comprehensive evaluation methods were used to assess their tolerance at the germination stage. Among the 170 germplasms, we identified 12 saline-alkali-tolerant and 34 saline-alkali-sensitive germplasms. Subsequently, 23 germplasms were further evaluated for saline-alkali tolerance at the seedling stage. While seedling growth was inhibited across all specimens, five saline-alkali-tolerant germplasms were ultimately selected through comprehensive evaluation methods. We further examined photosynthetic pigment levels, membrane permeability, antioxidant oxidases, osmotic regulators, and mineral content to determine the plants' response. Germplasms with a higher tolerance to saline-alkali stress can adapt by (i) maintaining or increasing chlorophyll content and delaying leaf senescence, (ii) using osmotic adjustment by maintaining stable osmotic potential, (iii) maintaining relatively stable electrical conductivity, (iv) enhancing antioxidant systems and maintaining a relatively low level of malondialdehyde, and (v) utilizing ion adjustment by promoting higher accumulation of Ca2+, Mg2+, and Mn2+ in the roots and ensuring higher ratios of K+/Na+, Ca2+/Na+, and Mg2+/Na+ in the leaves. These findings could serve as a valuable reference for future investigations of genetic mechanisms underlying saline-alkali tolerance in Oenothera L. species and provide a foundation for the conservation of germplasm resources, genetic improvement, and application of Oenothera L. species in saline-alkali environments.

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来源期刊
Physiologia plantarum
Physiologia plantarum 生物-植物科学
CiteScore
11.00
自引率
3.10%
发文量
224
审稿时长
3.9 months
期刊介绍: Physiologia Plantarum is an international journal committed to publishing the best full-length original research papers that advance our understanding of primary mechanisms of plant development, growth and productivity as well as plant interactions with the biotic and abiotic environment. All organisational levels of experimental plant biology – from molecular and cell biology, biochemistry and biophysics to ecophysiology and global change biology – fall within the scope of the journal. The content is distributed between 5 main subject areas supervised by Subject Editors specialised in the respective domain: (1) biochemistry and metabolism, (2) ecophysiology, stress and adaptation, (3) uptake, transport and assimilation, (4) development, growth and differentiation, (5) photobiology and photosynthesis.
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