Polyploidy and the relationship between leaf structure and function: implications for correlated evolution of anatomy, morphology, and physiology in Brassica

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• 作者：Robert L. Baker ; Yulia Yarkhunova ; Katherine Vidal ; Brent E. Ewers…
• 关键词：Brassica ; Polyploidy ; Phenotypic integration ; Leaf morphology ; Leaf anatomy ; Leaf physiology ; Triangle of U ; Hybridization ; Whole genome duplication
• 刊名：BMC Plant Biology
• 出版年：2017
• 出版时间：December 2017
• 年：2017
• 卷：17
• 期：1
• 全文大小：2501KB
• 刊物主题：Plant Sciences; Agriculture; Tree Biology;
• 出版者：BioMed Central
• ISSN：1471-2229
• 卷排序：17

文摘

BackgroundPolyploidy is well studied from a genetic and genomic perspective, but the morphological, anatomical, and physiological consequences of polyploidy remain relatively uncharacterized. Whether these potential changes bear on functional integration or are idiosyncratic remains an open question. Repeated allotetraploid events and multiple genomic combinations as well as overlapping targets of artificial selection make the Brassica triangle an excellent system for exploring variation in the connection between plant structure (anatomy and morphology) and function (physiology). We examine phenotypic integration among structural aspects of leaves including external morphology and internal anatomy with leaf-level physiology among several species of Brassica. We compare diploid and allotetraploid species to ascertain patterns of phenotypic correlations among structural and functional traits and test the hypothesis that allotetraploidy results in trait disintegration allowing for transgressive phenotypes and additional evolutionary and crop improvement potential.