期刊
JOURNAL OF EXPERIMENTAL BOTANY
卷 67, 期 1, 页码 31-45出版社
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erv447
关键词
Carbon; crops; models; nitrogen; plant growth; regulation; sink; source
资金
- Society for Experimental Biology (SEB)
- United States Department of Energy [DE-SC00112704]
- Next-Generation Ecosystem Experiments (NGEE Tropics) project by the Office of Biological and Environmental Research in the Department of Energy, Office of Science
Growth is a major component of fitness in all organisms, an important mediator of competitive interactions in plant communities, and a central determinant of yield in crops. Understanding what limits plant growth is therefore of fundamental importance to plant evolution, ecology, and crop science, but each discipline views the process from a different perspective. This review highlights the importance of source-sink interactions as determinants of growth. The evidence for source-and sink-limitation of growth, and the ways in which regulatory molecular feedback systems act to maintain an appropriate source: sink balance, are first discussed. Evidence clearly shows that future increases in crop productivity depend crucially on a quantitative understanding of the extent to which sources or sinks limit growth, and how this changes during development. To identify bottlenecks limiting growth and yield, a holistic view of growth is required at the whole-plant scale, incorporating mechanistic interactions between physiology, resource allocation, and plant development. Such a holistic perspective on source-sink interactions will allow the development of a more integrated, whole-system level understanding of growth, with benefits across multiple disciplines.
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