Understanding the response mechanisms of C4 and C3 crops to PFHxA exposure from the perspective of plant water physiology and self-detoxification
文献类型： 外文期刊
作者： Xu, Xiangnan 1 ; Chen, Huilun 2 ; Liao, Shangqiang 1 ; Li, Yanmei 1 ; Sun, Yanxin 1 ; Zou, Guoyuan 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr Resources & Environm, 9 Shuguanghuayuan, Beijing 100097, Peoples R China
2.Univ Sci & Technol Beijing, Sch Energy & Environm Engn, 30 Xueyuan Rd, Beijing 100083, Peoples R China
关键词： Ammonium metabolism; Biomass loss; Root amino acids exudation; Root cell malfunction; Stomata morphology; WUE
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：11.3； 五年影响因子：12.4 ）
ISSN： 0304-3894
年卷期： 2025 年 493 卷
页码：
收录情况： SCI
摘要： Normally C4 crops have better abiotic stress resistance than C3 crops, so they might possess different tolerance to per-and polyfluoroalkyl substances (PFASs). Here we reported a hydroponic study on the factors affecting plant accumulation and tolerance to PFHxA in terms of plant water physiology and self-detoxification mechanisms. Two C3 crops and two C4 crops were subjected to PFHxA exposure (0.2 mg per growing system), and PFHxA induced the decline of transpiration, stomata aperture and size, root surface area and root volume of all the experimented plants, along with an imbalance of ammonium metabolism. Compared with C4 crops, C3 crops had higher PFHxA accumulation per system, higher PFHxA absorption per volume of water consumption and stronger PFHxA tolerance than C4 crops as shown by the lighter biomass loss, better root cell wall integrity and stimulated protein accumulation. The increase of water use efficiency promoted plant PFHxA uptake and ameliorated biomass loss of C3 crops, whilst the root-exudated amino acids protected the root cell wall structure. Both shoot performance and root exudation results showed that ammonium and amino acid metabolism had a vital role in plant detoxification under PFHxA exposure, which merited further study.
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