Morphological and physiological responses of two Osmanthus fragrans cultivars to salt stress.

IF 2.1 4区生物学 Q2 PLANT SCIENCES Photosynthetica Pub Date : 2023-04-11 eCollection Date: 2023-01-01 DOI:10.32615/ps.2023.012

C Y Guo, C J Meng, M Yue

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Abstract

We examined the morphological and physiological responses of Osmanthus fragrans 'Yingui' (Yin) and O. fragrans 'Jingui' (Jin) to different NaCl concentrations. NaCl concentrations significantly affected plant height and leaf mass per area. Total biomass decreased by 22.8-41.8% under moderate and high NaCl which inhibited O. fragrans growth. The ratio of root to shoot biomass in Yin was 44.3% higher than that in Jin at high NaCl concentrations which suggested that Yin possesses conservative resource acquisition strategies to resist salt stress. Compared to Yin, Jin showed higher net photosynthesis, stomatal conductance, and intercellular CO₂ concentration under high NaCl treatment. Jin exhibited also relatively higher proline, soluble sugar, K⁺ content, and K⁺/Na⁺ under the treatments implying that acquisitive resource acquisition may be the main strategy for salt resistance in Jin. Our results demonstrated that Yin and Jin could be cultivated in saline land in a short time and the two cultivars respond to salinity by different morphological and physiological mechanisms.

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两种桂花品种对盐胁迫的形态生理响应。

研究了不同NaCl浓度下金桂桂花和银桂桂花的形态和生理反应。NaCl浓度显著影响株高和单位面积叶质量。中高NaCl处理下，总生物量减少22.8% ~ 41.8%，抑制了香薷的生长。在高NaCl胁迫下，阴的根冠生物量比金高44.3%，表明阴具有保守的资源获取策略来抵抗盐胁迫。与阴相比，在高NaCl处理下，金表现出更高的净光合作用、气孔导度和胞间CO2浓度。在不同处理下，金豆的脯氨酸、可溶性糖、K+含量和K+/Na+含量也相对较高，说明获取性资源获取可能是金豆抗盐的主要策略。结果表明，阴、金两品种均可在盐碱地短时间内栽培，并通过不同的形态生理机制对盐碱地的盐碱化做出响应。

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来源期刊

Photosynthetica 生物-植物科学

CiteScore

5.60

自引率

7.40%

发文量

审稿时长

3.8 months

期刊介绍： Photosynthetica publishes original scientific papers and brief communications, reviews on specialized topics, book reviews and announcements and reports covering wide range of photosynthesis research or research including photosynthetic parameters of both experimental and theoretical nature and dealing with physiology, biophysics, biochemistry, molecular biology on one side and leaf optics, stress physiology and ecology of photosynthesis on the other side. The language of journal is English (British or American). Papers should not be published or under consideration for publication elsewhere.