1. 首页 > 资源库 > 中文 > 植物所论文库

Plant genome size modulates grassland community responses to multi-nutrient additions

作　　者：Peng Y#, Yang JX#, Leitch IJ, Guignard MS, Seabloom EW, Cao D, Zhao FY, Li HL, Han XG, Jiang Y, Leitch AR*, Wei CZ*
影响因子：10.323
刊物名称：New Phytologist
出版年份：2022
卷：  期：  页码：DOI:10.1111/nph.18496

论文摘要：

  • Grassland ecosystems cover c. 40% of global land area and contain c. 40% of soil organic carbon. Understanding the effects of adding nutrients to grasslands is essential because they provide much of our food, support diverse ecosystem services and harbor rich biodiversity.
  • Using the meadow steppe (grassland) study site of Inner Mongolia, we manipulated seven key nutrients and a cocktail of micronutrients to examine their effects on grassland biomass productivity and diversity.
  • The results, explained in structural equation models, link two previously disparate hypotheses in grassland ecology: (1) the light asymmetry competition hypothesis and (2) the genome size-nutrient interaction hypothesis. We show that aboveground net primary productivity increases predominantly from species with large genome sizes with the addition of nitrogen, and nitrogen plus phosphorus. This drives an asymmetric competition for light, causing a decline in species richness mainly in species with small genome sizes.
  • This dynamic is likely to be caused by the nutrient demands of the nucleus and/or the scaling effects of nuclear size on cell size which impact water use efficiency. The model will help inform the best management approaches to reverse the rapid and unprecedented degradation of grasslands globally.
全文链接：https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.18496
版权所有 © 中国科学院植物研究所　备案号：京ICP备16067583号-24　文保网安备案号：1101080078
地址：北京市海淀区香山南辛村20号　邮编：100093
电话：010-62590835