全球变暖背景下水稻对土壤微塑料污染的生理生态响应

doi:10.3969/j.issn.1674-7968.2026.07.001

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Abstract Climate warming and soil microplastic pollution seriously threaten agricultural production safety. Clarifying the ecological response characteristics and physiological molecular mechanisms of rice (Oryza sativa) under these dual environmental stresses is the core key to coping with agricultural ecological adversity. This study used greenhouse pot experiments to simulate a 1.5 ℃ warming treatment and set polyethylene microplastic (PE-MPs) pollution gradients of 0%, 1%, 2%, 5%, and 10% (w/w). The study systematically evaluated the apparent growth parameters, photosynthetic pigment content, and oxidative stress indicators of rice under the combined stresses of warming and soil microplastics. The results showed that the single PE-MPs treatment significantly promoted the accumulation of the basal stem and aboveground and belowground biomass of rice (P<0.05), had no significant effect on the chlorophyll content, and the oxidative damage in the roots was significantly higher than that in the leaves (P<0.05). The warming treatment changed the morphology of rice, leading to a significant increase in plant height, root length and basal stem (P<0.05). Although it had no significant effect on the aboveground biomass, it significantly increased the belowground biomass. At the same time, it caused a significant increase in the chlorophyll content, as well as the contents of superoxide dismutase (SOD) and malondialdehyde (MDA) in the leaves (P<0.05). The combined treatment of both factors had a more pronounced inhibition on and photosynthetic content of root length and stem diameter compared to the single treatment. For the roots, the combined treatment only significantly increased SOD at 1% and 2% concentrations and alleviated the warming-induced increase in catalase (CAT), peroxidase (POD), and MDA. In summary, the effects of PE-MPs and warming on rice were not entirely synergistic, and PE-MPs caused mechanical damage to the rice roots. This study revealed the traits and complex interactive effects of global warming and PE-MPs on rice growth and development, providing experimental evidence for the risk assessment of agricultural ecosystems under climate change and theoretical support to develop pollution prevention and control strategies in agriculture.

Key words： Global warming Polyethylene microplastic (PE-MPs) Rice Apparent growth Photosynthetic pigments Oxidase activity

Received: 11 June 2025

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Corresponding Authors: * yangbin_0502@hotmail.com

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	LI Jin-Yu
	DIAO Shu-Han
	WANG Yi-Fei
	CHENG Chi
	CHEN Jun-Hui
	CUI Miao-Miao
	WANG Lan-Lan
	YANG Bin

Cite this article:

LI Jin-Yu,DIAO Shu-Han,WANG Yi-Fei, et al. The Ecophysiological Response of Rice (Oryza sativa) to Soil Microplastic Pollution in the Context of Global Warming[J]. 农业生物技术学报, 2026, 34(7): 1369-1382.

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https://journal05.magtech.org.cn/Jwk_ny/EN/10.3969/j.issn.1674-7968.2026.07.001 OR https://journal05.magtech.org.cn/Jwk_ny/EN/Y2026/V34/I7/1369

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