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Forests 2018, 9(8), 500;

Taylor’s Power Law for Leaf Bilateral Symmetry

Co-Innovation Centre for Sustainable Forestry in Southern China, College of Biology and the Environment, Bamboo Research Institute, Nanjing Forestry University, Nanjing 210037, China
Tasmanian Institute of Agriculture, University of Tasmania, Private Bag 98, Hobart, Tasmania 7001, Australia
Intuit Inc., 7535 Torrey Santa Fe Rd, San Diego, CA 92131, USA
Author to whom correspondence should be addressed.
Received: 17 July 2018 / Revised: 12 August 2018 / Accepted: 14 August 2018 / Published: 16 August 2018
(This article belongs to the Section Forest Ecophysiology and Biology)
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Leaf shape and symmetry is of interest because of the importance of leaves in photosynthesis. Recently, a novel method was proposed to measure the extent of bilateral symmetry in leaves in which a leaf was divided into left and right sides by a straight line through the leaf apex and base, and a number of equidistant strips were drawn perpendicular to the straight line to generate an equivalent number of differences in area between the left and right parts. These areal differences are the basis for a measure of leaf bilateral symmetry, which was then examined to see how well it follows Taylor’s power law (TPL) using three classes of plants, namely, 10 geographical populations of Parrotia subaequalis (H.T. Chang) R.M. Hao et H.T. Wei, 10 species of Bambusoideae, and 10 species of Rosaceae. The measure of bilateral symmetry followed TPL for a single species or for a class of closely related species. The estimate of the exponent of TPL for bamboo plants was significantly larger than for the dicotyledonous trees, but its goodness of fit was the best among the three classes of plants. The heterogeneity of light falling on branches and leaves due to above-ground architectural patterns is an important contributor to leaf asymmetry. View Full-Text
Keywords: Bambusoideae; bootstrap; log-transformation; Parrotia subaequalis; Rosaceae Bambusoideae; bootstrap; log-transformation; Parrotia subaequalis; Rosaceae

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Wang, P.; Ratkowsky, D.A.; Xiao, X.; Yu, X.; Su, J.; Zhang, L.; Shi, P. Taylor’s Power Law for Leaf Bilateral Symmetry. Forests 2018, 9, 500.

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