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干旱中的弹性:从生物量减少到Sewan草中的抗氧化剂积累

Safura Bibi¹, Muhammad Sajid Aqeel Ahmad², Ali Bahadur³

¹Department of Botany, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan. safurabotany@gmail.com.

BMC plant biology

|November 22, 2025

概括

塞万草通过结构和生理适应,表现出显著的土壤水分缺陷耐受性. 关键的适应包括增加的抗氧化酶和氧化物,以及生物质,叶面积和根长度的变化,以实现干旱生存.

科学领域:

植物生理学植物生理学
生态生态学生态生态学
植物学植物学

背景情况:

沙漠草 (Lasiurus scindicus) 是一种在巴基斯坦沙漠中普遍存在的耐旱物种.
关于其特定的结构和生理适应于土壤水分缺陷的研究有限.

研究的目的:

研究塞万草种群对土壤水分缺陷的自然结构和生理适应.
在干旱条件下对不同Sewan草种群的耐受性水平进行排名.

主要方法:

对不同种群 (SoV,NpT,Cho) 的生长参数 (生物质,叶面积,根长) 的比较分析.
测量光合作用色素和离子积累在芽和根组织中的量度.
测定抗氧化酶活性 (SOD,POD,CAT,APX) 和有机氧化物 (甘氨酸,贝他因,普罗林).
显微镜检查根和芽组织中的结构适应.

主要成果:

在水分压力人口中观察到的芽和根生物量,叶面积和光合作用颜料的显著减少.
在耐受性种群中,在芽组织中增加了离子的积累,并且增加了抗氧化酶和氧化物 (glycine betaine,proline) 的活性 (Cho).
超干旱种群的结构性适应包括加厚的硬化组织,降低表皮厚度,以及较小的甲体容器,以提高水的导通性.
耐受性排名:Cho > NpT > SoV. 这是一个很好的排名.

结论:

塞万草种群表现出显著的结构和生理适应,以应对土壤水分不足.
关键的适应包括增强的抗氧化防御系统,透调整和组织结构的修改,以改善水资源管理.
这些适应性共同有助于Sewan草在干旱环境中的高耐受性.

关键词:

抗氧化剂抗氧化剂是一种抗氧化剂.叶绿素a 是一种霍利斯坦 (Cholistan) 是一个古老的地区.湿度缺陷是指湿度不足的情况.这里是Sewan草.

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