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Seed shape in model legumes: approximation by a cardioid reveals differences in ethylene insensitive mutants of Lotus japonicus and Medicago truncatula

AuthorsCervantes, Emilio ; Martín Gómez, José Javier ; Kuen Chan, Pick; Gresshoff, Peter M; Tocino, Ángel
Proporción áurea
Issue Date2012
CitationJournal of Plant Physiology
AbstractSeed shape in the model legumes Lotus japonicus and Medicago truncatula is described. Based on previous work with Arabidopsis, the longitudinal section of seeds is compared with a cardioid, the trajectory described by a point of a circle that rolls around another fixed circle with the same radius. Lotus japonicus seeds adjust well to an unmodified cardioid, whereas accurate adjustment in Medicago truncatula is obtained by the simple transformation of scaling the vertical axis by a factor of the Golden Ratio. Adjustment of seed shape with simple geometrical forms becomes an essential tool for the statistical analysis of variations in seed shape under different environmental or genetic (i.e., mutant) conditions. Seeds of ethylene insensitive mutants present differences in size and shape as well as altered responses to imbibition. The biological implication and meaning of these relationships are discussed.
Publisher version (URL)10.1016/j.jplph.2012.05.019
Appears in Collections:(IRNASA) Artículos
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