期刊
AMERICAN JOURNAL OF BOTANY
卷 96, 期 2, 页码 531-536出版社
WILEY
DOI: 10.3732/ajb.0800250
关键词
diminishing returns hypothesis; Hagen-Poiseuille equation; Lemna minor; Myriophyllum heterophyllum; plant allometry; scaling relationships
资金
- College of Agriculture and Life Sciences, Cornell University
The manner in which increases in leaf surface area S scale with respect to increases in leaf dry mass M-t within and across species has important implications to understanding the ability of plants to harvest sunlight, grow, and ultimately reproduce. Thus far, no mechanistic explanation has been advanced to explain why prior work shows that the scaling exponent governing the S to M-t relationship is generally significantly less than one (i.e., S proportional to M-t(alpha<1.0)) such that increases in M-t yield diminishing returns with respect to increases in S across most species. Here, we show analytically why this phenomenon occurs and present equations that predict trends observed in the numerical values of scaling exponents for the S vs. M-t relationships observed across dicot tree species and two aquatic vascular plant species.
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