2015
DOI: 10.1002/dvdy.24280
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Evolution of petaloidy in the zingiberales: An assessment of the relationship between ultrastructure and gene expression patterns

Abstract: Background: The development of petal-like organs has occurred repetitively throughout angiosperm evolution. Despite homoplasy, it is possible that common underlying molecular mechanisms are repeatedly recruited to drive the development of petaloid organs. In Zingiberales, infertile, petal-like structures replace fertile stamens, resulting in petaloidy in androecial whorls. Assuming that androecial petaloidy is a shared derived characteristic, we expect to find common ultrastructure and molecular mechanisms und… Show more

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Cited by 10 publications
(4 citation statements)
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“…Stamens are highly modified lateral organs that, in most angiosperms, have lost their laminar expansion, resulting in narrow filaments topped by bulbous microsporangia. Recent work hypothesizes that the lack of laminar expansion results from unbalanced expression of adaxial/abaxial factors [47]. Functional studies are needed to test hypothesis, but this model of altering organ shape by modifying polarity is consistent with what has been seen in highly modified leaves.…”
Section: Diversity In Reproductive Shapesupporting
confidence: 64%
“…Stamens are highly modified lateral organs that, in most angiosperms, have lost their laminar expansion, resulting in narrow filaments topped by bulbous microsporangia. Recent work hypothesizes that the lack of laminar expansion results from unbalanced expression of adaxial/abaxial factors [47]. Functional studies are needed to test hypothesis, but this model of altering organ shape by modifying polarity is consistent with what has been seen in highly modified leaves.…”
Section: Diversity In Reproductive Shapesupporting
confidence: 64%
“…Throughout the evolution of the Zingiberales, the number of fertile stamens is drastically reduced from 5–6 fertile stamens in the banana lineages to one or fertile stamen in the ginger clade. This reduction in fertile stamen number is inversely correlated to an increase in petaloidy, in which the infertile androecial members laminarize (flatten) and develop into petal-like organs ( Almeida, Yockteng & Specht, 2015 ) ( Fig. 1B ).…”
Section: Introductionmentioning
confidence: 99%
“…In flowers of the Zingiberalean ginger families (Costaceae, Zingiberaceae, Cannaceae, and Marantaceae), petaloid staminodes account for the "showy" aspect of the floral display, taking on the role and function typically held by petals. The androeciumderived "petaloid" structures are, however, different from secondwhorl petals in their appearance and epidermal cell morphology (Almeida et al, 2015), indicating that mechanisms making a petaloid structure may not be homologous across the whorls. In this research, the genomic presence and expression of endogenous CYC/TB1-like genes was studied to determine their potential role in generating petaloid structures and thereby effecting overall patterns of floral symmetry.…”
Section: Cyc/tb1-like Genes May Be Involved In the Formation Of The Nmentioning
confidence: 96%