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来自地热地区的Heliotropium hirsutissimum:热适应的证据

Asiye Sezgin Muslu¹, Asim Kadıoğlu²

¹Department of Biology, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Türkiye. asiyeszgn@outlook.com.

|June 4, 2025

概括

热 (Heliotropium hirsutissimum) 具有显著的耐热性,通过增加抗氧化剂和氧化物,在高土壤温度下壮成长. 这种植物有效地保护其光合作用机制,并在极端热应激下保持水的状态.

科学领域:

植物生理学植物生理学
环境压力生物学
植物学植物学

背景情况:

Heliotropium L. 是Boraginaceae家族的一个属,在全球有250个物种,其中15种在土耳其.
通常在温带地区发现的Heliotropium hirsutissimum在土耳其的高温地热地区生长.
之前没有任何研究表明H. hirsutissimum具有耐热性,这促使人们对其生存机制进行了调查.

研究的目的:

研究Heliotropium hirsutissimum对极高土壤温度的耐受机制.
在不同的土壤温度条件下确定H. hirsutissimum的生理和生化反应.

主要方法:

从地热地区收集了H. hirsutissimum的种子.
在实验室条件下,在15天内,植物在实验室条件下逐渐增加土壤温度 (20°C至80°C±5°C).
评估了形态变化,相对含水量,氧化应激标志物 (TBARS,H2O2),细胞膜稳定性,氧化物积累,抗氧化酶活动,酸盐水平,叶绿素光和光合作用气体交换.

主要成果:

H. hirsutissimum对高土壤温度具有显著的耐受性,对其负面影响最小.
观察到氧化物和甲酸盐水平的增加,以及增强的抗氧化酶活性.
光合作用气体交换和叶绿素光参数在很大程度上不受土壤温度升高的影响.

结论:

螺 hirsutissimum 具有强大的耐受性机制,可以耐受高土壤温度.
增强的抗氧化能力和氧化物积累是保护细胞完整性和在热应激下维持生理功能的关键因素.
植物有效地保护其光合作用机械,使其能够在极端热环境中生存和生长.

关键词:

热 (Heliotropium hirsutissimum) 是一个极高的热.抗氧化能力的抗氧化能力.叶绿素的光效应叶绿素光效应高温耐受性耐受性高温耐受性光合作用机械光合作用机械

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