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在干旱季节中,Mikania micrantha的干旱耐受性以茎为中心

Minling Cai¹, Minghao Chen¹, Junjie Zhang²

¹College of Life Science, Huizhou University, Huizhou 516007, China.

International journal of molecular sciences

|October 16, 2025

概括

米卡尼亚微桑塔的茎通过结构和生化适应性,表现出对干旱的弹性,与它们易受影响的叶子不同. 这种干旱耐受性是干旱条件下杂草生存的关键.

科学领域:

植物生物学植物生物学
生态生态学生态生态学
环境科学环境科学

背景情况:

全球侵袭性杂草Mikania micrantha正在扩展到干旱的息地.
在Mikania micrantha的干旱耐受机制是不太了解,特别是在气候变化.
在中国南部,季节性气候变化对植物生存构成挑战.

研究的目的:

为了研究米卡尼亚微的干旱耐受机制,叶子和茎.
为了比较Mikania micrantha在干燥条件下对本土葡萄树Paederia scandens的反应.
为了确定关键的生理和分子适应,有助于Mikania micrantha的生存.

主要方法:

实地实验比较了中国南部的干旱和潮湿季节.
测量表型变化,光合作用特性和物质含量 (抗氧化剂,透调节剂).
分析干部解剖学,基因表达 (bZIP转录因子) 和对照对比与Paederia scandens.

主要成果:

在干旱季节,Mikania micrantha的叶子出现了枯和相对水含量 (RWC),叶绿素 (Chl),可溶糖 (SS) 和可溶蛋白 (SP) 的降低.
米卡尼亚微桑塔茎保持稳定的表型和叶绿素,血管壁厚度,密度,总,过氧化酶 (POD) 和酸盐过氧化酶 (APX) 活性增加.
与Paederia scandens相比,茎还显示皮质比例,黄和可溶性蛋白质含量增加得更大,bZIP60和ZIP42-1基因的上调.

结论:

米卡尼亚微桑塔的叶子容易受到干旱的影响,但树干表现出显著的弹性.
茎适应包括结构修改,增强抗氧化能力和透调整.
干耐受性和息地扩张的基干特异性适应对Mikania micrantha的耐旱性和息地扩张至关重要.

关键词:

麦克兰塔 (M. micrantha) 是一个微型虫.干旱的季节干旱的季节透调整物质是一种透调整物质.树干树干树干树干

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