Perianth - Wikipedia
网页The perianth (perigonium, perigon or perigone in monocots) is the non-reproductive part of the flower, and structure that forms an envelope surrounding the sexual organs, consisting of the calyx (sepals) and the corolla (petals) or tepals when called a perigone.
Frontiers | How to Evolve a Perianth: A Review of Cadastral …
网页2018年10月28日 · Here we propose that cadastral mechanisms that maintain reproductive organ identities to the center of the flower could have supported perianth evolution. In particular, repressing B- and C-class genes expression toward the inner whorls of the flower, is a key process to isolate domains with sepal and petal identity in the outer whorls.
Bridging the gaps: evolution and development of perianth fusion
网页2015年6月11日 · Evolution and development of symperianthy (sympetaly and syntepaly). (a) Convergent origins of symperianthy. Taxa with fused perianths (petals or tepals) are coded in red, whereas taxa with generally unfused perianths are coded in black. Red branches show a likely single origin of sympetaly in asterids.
Model for perianth formation in orchids | Nature Plants
网页2015年4月27日 · Here, we demonstrate a conserved principle, called the Perianth (P) code, which involves competition between two protein complexes containing different AP3/AGL6 homologues to determine the...
Perianth - an overview | ScienceDirect Topics
网页The perianth (or perigonium) is the outermost, nonreproductive group of modified leaves of a flower (The term perianth has also been used for components of the reproductive structures of various Gnetales, but these are not homologous.) A perianth is absent in some flowering plants, typically those taxa that have very small, reduced flowers.
More is better: the uses of developmental genetic data to
网页Here we describe the use of developmental genetic data as an additional strategy to infer the ancestral perianth character state for different angiosperm clades. By assessing functional data in combination with expression data in a maximum likelihood framework, we provide a novel approach for investigating the evolutionary history of the perianth.
How to Evolve a Perianth: A Review of Cadastral Mechanisms for Perianth ...
网页2018年10月29日 · Here we propose that cadastral mechanisms that maintain reproductive organ identities to the center of the flower could have supported perianth evolution. In particular, repressing B- and C-class genes expression toward the inner whorls of the flower, is a key process to isolate domains with sepal and petal identity in the outer whorls.
Corolla retention after pollination facilitates the development …
网页2019年1月24日 · Corollas (or perianths), considered to contribute to pollinator attraction during anthesis, persist after anthesis in many plants. However, their post-floral function has been little investigated...
Perianth symmetry changed at least 199 times in angiosperm evolution
网页2016年10月12日 · Perianth bilateral symmetry (zygomorphy) has evolved repeatedly from radial symmetry (actinomorphy) throughout angiosperms. Zygomorphy has previously been linked with plant-pollinator specialization and higher species diversification. However, the exact number of transitions to and from zygomorphy has remained so …
(PDF) More is better: The uses of developmental genetic data to ...
网页2009年1月1日 · Here we describe the use of developmental genetic data as an additional strategy to infer the ancestral perianth character state for different angiosperm clades. By assessing functional data in...