多年生草原干旱后的补偿生长是由土壤的遗留效应决定的，而不是由植物决定的。

IF 8.3 1区生物学 Q1 PLANT SCIENCES

New Phytologist Pub Date : 2023-10-03 DOI:10.1111/nph.19291

Marie-Louise Schärer, Andreas Lüscher, Ansgar Kahmen

引用次数: 0

摘要

从干旱中恢复的草原在生物量生产方面一再表现出优于非干旱胁迫的草原。然而，导致从干旱中恢复的草原生物量产量出乎意料地高的机制尚不清楚。为了理清植物内在和植物外在（土壤）干旱遗产对草原从干旱中恢复的影响，我们设计了一个因子田间实验，将暴露于2个月干旱或良好浇水控制条件下的多年生Lolium植物移植到控制和干旱胁迫的土壤中，然后重新浇水。当与土壤介导的DRW效应脱钩时，与对照植物（Ctrp）相比，干旱和再湿润（DRW）导致了先前干旱胁迫植物（DRWp）的负干旱遗留效应，与Ctrp相比，DRWp表现出较低的地上生产力（-13%）、有限的氮营养和较高的δ13C。然而，与生长在对照土壤（Ctrs）上的植物相比，生长在先前干旱胁迫土壤（DRW）上的植株表现出提高的地上生产力（+82%）、改善的氮营养和更高的δ13C值，而不考虑植株的预处理。我们的研究表明，与非干旱胁迫对照相比，从干旱中恢复的多年生草原的干旱后生产力更高，是由土壤介导的DRW遗传效应引起的，该效应改善了植物的氮营养和光合能力，并且这些效应抵消了植物固有的负干旱遗传效应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Post-drought compensatory growth in perennial grasslands is determined by legacy effects of the soil and not by plants

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Post-drought compensatory growth in perennial grasslands is determined by legacy effects of the soil and not by plants

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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.