UVRESISTANCE LOCUS 8 signalling enhances photosynthetic resilience to herbicide‐induced damage in Arabidopsis thaliana

IF 8.3 1区生物学 Q1 PLANT SCIENCES

New Phytologist Pub Date : 2025-06-14 DOI:10.1111/nph.70303

Christopher L. Groves, Keara A. Franklin

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引用次数: 0

Abstract

Summary

Perception of low irradiance ultraviolet B (UV‐B) light (280–315 nm) by the UV RESISTANCE LOCUS 8 (UVR8) photoreceptor initiates signalling pathways that enhance plant defences to UV‐B damage, mitigating the effects of higher photon irradiances. We therefore questioned whether UVR8 signalling could also prime plants against herbicide‐induced damage, promoting postspray survival.

We assessed the effects of a 2 d, low irradiance UV‐B pretreatment on the photosynthetic resilience and survival of Arabidopsis thaliana plants treated with herbicides promoting photosynthetic disruption and oxidative stress.

UV‐B acclimation increased leaf carotenoid production, antioxidant activity and nonphotochemical quenching (NPQ) and delayed herbicide‐induced reductions in electron transport rate (ETR), facilitating postspray regrowth and enhancing plant survival. In the absence of UV‐B, this protection declined within 4 d, suggesting that it is unlikely to result from structural modifications. UV‐B‐mediated enhancement of photosynthetic resilience was abolished in the uvr8‐6 mutant and increased in the UV‐B hyper‐responsive repressor of UV‐B photomorphogenesis1/2 (rup1rup2) mutant, highlighting the involvement of UVR8 signalling. UV‐B filtering during daylight acclimation also increased herbicide efficacy in Chenopodium, suggesting similar responses in agricultural weeds.

UV‐B‐induced photoprotection enhances the resilience of plant photosystems to herbicide damage, providing a key target for increasing product efficacy and reducing usage.

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抗紫外位点8信号增强拟南芥对除草剂诱导损伤的光合恢复能力

紫外线抗性位点8 （UVR8）光感受器对低辐照度紫外线B （UV - B）光（280-315 nm）的感知启动信号通路，增强植物对紫外线B损伤的防御，减轻高光子辐照的影响。因此，我们质疑UVR8信号是否也能使植物抵抗除草剂引起的伤害，促进喷后的存活。我们评估了2天低辐照度UV - B预处理对促光合破坏和氧化应激除草剂处理的拟南芥植株光合恢复能力和存活的影响。UV - B驯化增加了叶片类胡萝卜素的产生、抗氧化活性和非光化学猝灭（NPQ），并延缓了除草剂诱导的电子传递速率（ETR）的降低，促进了喷后的再生和提高了植物的存活率。在没有UV - B的情况下，这种保护作用在4天内下降，这表明它不太可能是由结构修饰引起的。UV‐B介导的光合弹性增强在uvr8‐6突变体中被消除，而在UV‐B光形态发生1/2 （rup1rup2）突变体的UV‐B高响应抑制因子中增加，突出了uvr8信号的参与。日光驯化期间的UV - B过滤也提高了藜草的除草剂功效，这表明在农业杂草中也有类似的反应。UV - B诱导的光保护增强了植物光系统对除草剂伤害的恢复能力，为提高产品功效和减少使用提供了关键目标。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

New Phytologist 生物-植物科学

自引率

5.30%

发文量

728

期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.