Kimberley J. Simpson, Sahr Mian, Elisabeth J. Forrestel, Jan Hackel, Joseph A. Morton, Andrew R. Leitch, Ilia J. Leitch
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引用次数: 0
摘要
基因组大小（GS）的增加与 DNA 复制速度减慢以及细胞对氮（N）和磷的需求增加有关。尽管大多数植物物种的基因组较小，但存在基因组较大的物种，这表明在某些条件下，这种成本可以忽略不计，或者说是有益的。我们以分布广泛、种类繁多的禾本科植物（禾本科）为研究对象，利用物种在不同环境条件下的气候生态位和生长速率数据来检验与 GS 相关的生长成本或效益。我们还探讨了光合作用途径、生活史和进化史对禾本科植物GS的影响。我们发现，进化史、光合作用途径和生活史都会影响禾本科物种GS的分布。一年生草种和 C4 草种的基因组较小，后者允许 C4 叶解剖所需的小细胞。我们发现，较大的基因组与较高的氮供应量有关，而对于多年生物种来说，则与较低的生长季节温度有关。我们的研究结果表明，在全球范围内，GS是预测草地表现的一个重要指标，它取决于环境条件。GS较大的物种的优势可能是由于相关的细胞尺寸较大，从而在土壤肥力满足氮需求和/或通过不依赖温度的细胞扩展进行生长的情况下能够快速产生生物量。
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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