期刊
INTERNATIONAL JOURNAL OF PLANT SCIENCES
卷 181, 期 1, 页码 75-87出版社
UNIV CHICAGO PRESS
DOI: 10.1086/706186
关键词
genome; photosynthesis; leaf economics spectrum; cell size
资金
- National Science Foundation [1838327]
- Division Of Environmental Biology
- Direct For Biological Sciences [1838327] Funding Source: National Science Foundation
- Austrian Science Fund (FWF) [M2245] Funding Source: Austrian Science Fund (FWF)
A central challenge in plant ecology is to define the major axes of plant functional variation with direct consequences for fitness. Central to the three main components of plant fitness (growth, survival, and reproduction) is the rate of metabolic conversion of CO2 into carbon that can be allocated to various structures and functions. Here we (1) argue that a primary constraint on the maximum rate of photosynthesis per unit leaf area is the size and packing density of cells and (2) show that variation in genome size is a strong predictor of cell sizes, packing densities, and the maximum rate of photosynthesis across terrestrial vascular plants. Regardless of the genic content associated with variation in genome size, the simple biophysical constraints of encapsulating the genome define the lower limit of cell size and the upper limit of cell packing densities, as well as the range of possible cell sizes and densities. Genome size, therefore, acts as a first-order constraint on carbon gain and is predicted to define the upper limits of allocation to growth, reproduction, and defense. The strong effects of genome size on metabolism, therefore, have broad implications for plant biogeography and for other theories of plant ecology and suggest that selection on metabolism may have a role in genome size evolution.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据