Heat tolerance of a tropical–subtropical rainforest tree species Polyscias elegans: time-dependent dynamic responses of physiological thermostability and biochemistry

IF 8.1 1区 生物学 Q1 PLANT SCIENCES New Phytologist Pub Date : 2023-11-06 DOI:10.1111/nph.19356
Lingling Zhu, Andrew P. Scafaro, Elizabeth Vierling, Marilyn C. Ball, Bradley C. Posch, Frederike Stock, Owen K. Atkin
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热带亚热带雨林树种秀丽隐杆线虫的耐热性:生理热稳定性和生物化学的时间依赖性动态响应。
热胁迫中断了生理热稳定性,并引发了对植物生存至关重要的生化反应。然而,关于植物在数小时和数天内适应高温的速度,以及哪些调整至关重要,目前还知之甚少。热带亚热带雨林树种(秀丽隐杆线虫)在40°C下加热5 d、 在恢复到25°C之前13 恢复日期。使用最小叶绿素a荧光急剧上升的温度(Tcrit)来量化叶片的耐热性。Tcrit、代谢产物、热休克蛋白(HSP)丰度和膜脂脂肪酸(FA)组成进行定量。Tcrit在2内增加了4°C(48-52°C) 40°C暴露h,同时代谢产物和HSP快速积累。相比之下,它花了> 2. d使FA成分发生变化。至少2 Tcrit、HSP90、HSP70和FA需要d才能恢复到预应力水平。研究结果强调了秀丽隐杆线虫对热应激的多方面反应,以及这种反应如何在数小时到数天的范围内变化,最终导致光合耐热性水平的提高。在持续的全球气候变化中,当面临热浪时,这些反应对植物的生存至关重要。
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New Phytologist
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.
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