Micro- and Macroscale Patterns of Petal Morphogenesis in Nigella damascena (Ranunculaceae) Revealed by Geometric Morphometrics and Cellular Analyses

Petals, the inner organs in a differentiated perianth, generally play an important role in pollinator attraction. As such they exhibit an extraordinary diversity of shapes, sizes, and colors. Being involved in pollinator attraction and reward, they are privileged targets of evolution. The corolla of...

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Autores principales:	Pierre Galipot, Sylvain Gerber, Martine Le Guilloux, Florian Jabbour, Catherine Damerval
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	Nigella damascena petal allometry geometric morphometrics morphogenesis Ranunculaceae Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/da5fb79f38ed4527b2cd81e2ec5c5c6f
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spelling	oai:doaj.org-article:da5fb79f38ed4527b2cd81e2ec5c5c6f2021-11-19T06:13:07ZMicro- and Macroscale Patterns of Petal Morphogenesis in Nigella damascena (Ranunculaceae) Revealed by Geometric Morphometrics and Cellular Analyses1664-462X10.3389/fpls.2021.769246https://doaj.org/article/da5fb79f38ed4527b2cd81e2ec5c5c6f2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fpls.2021.769246/fullhttps://doaj.org/toc/1664-462XPetals, the inner organs in a differentiated perianth, generally play an important role in pollinator attraction. As such they exhibit an extraordinary diversity of shapes, sizes, and colors. Being involved in pollinator attraction and reward, they are privileged targets of evolution. The corolla of the Ranunculaceae species Nigella damascena consists of elaborate nectariferous petals, made of a stalk, upper, and lower lips forming a nectar pouch, shiny pseudonectaries, and pilose ears. While the main events of petal development are properly described, a few is known about the pattern of organ size and shape covariation and the cellular dynamics during development. In this study, we investigated the relationships between morphogenesis and growth of N. damascena petals using geometric morphometrics coupled with the study of cell characteristics. First, we found that petal shape and size dynamics are allometric during development and that their covariation suggests that petal shape change dynamics are exponentially slower than growth. We then found that cell proliferation is the major driver of shape patterning during development, while petal size dynamics are mostly driven by cell expansion. Our analyses provide a quantitative basis to characterize the relationships between shape, size, and cell characteristics during the development of an elaborate floral structure. Such studies lay the ground for future evo-devo investigations of the large morphological diversity observed in nectariferous structures, in Ranunculaceae and beyond.Pierre GalipotPierre GalipotSylvain GerberMartine Le GuillouxFlorian JabbourCatherine DamervalFrontiers Media S.A.articleNigella damascenapetalallometrygeometric morphometricsmorphogenesisRanunculaceaePlant cultureSB1-1110ENFrontiers in Plant Science, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Nigella damascena petal allometry geometric morphometrics morphogenesis Ranunculaceae Plant culture SB1-1110
spellingShingle	Nigella damascena petal allometry geometric morphometrics morphogenesis Ranunculaceae Plant culture SB1-1110 Pierre Galipot Pierre Galipot Sylvain Gerber Martine Le Guilloux Florian Jabbour Catherine Damerval Micro- and Macroscale Patterns of Petal Morphogenesis in Nigella damascena (Ranunculaceae) Revealed by Geometric Morphometrics and Cellular Analyses
description	Petals, the inner organs in a differentiated perianth, generally play an important role in pollinator attraction. As such they exhibit an extraordinary diversity of shapes, sizes, and colors. Being involved in pollinator attraction and reward, they are privileged targets of evolution. The corolla of the Ranunculaceae species Nigella damascena consists of elaborate nectariferous petals, made of a stalk, upper, and lower lips forming a nectar pouch, shiny pseudonectaries, and pilose ears. While the main events of petal development are properly described, a few is known about the pattern of organ size and shape covariation and the cellular dynamics during development. In this study, we investigated the relationships between morphogenesis and growth of N. damascena petals using geometric morphometrics coupled with the study of cell characteristics. First, we found that petal shape and size dynamics are allometric during development and that their covariation suggests that petal shape change dynamics are exponentially slower than growth. We then found that cell proliferation is the major driver of shape patterning during development, while petal size dynamics are mostly driven by cell expansion. Our analyses provide a quantitative basis to characterize the relationships between shape, size, and cell characteristics during the development of an elaborate floral structure. Such studies lay the ground for future evo-devo investigations of the large morphological diversity observed in nectariferous structures, in Ranunculaceae and beyond.
format	article
author	Pierre Galipot Pierre Galipot Sylvain Gerber Martine Le Guilloux Florian Jabbour Catherine Damerval
author_facet	Pierre Galipot Pierre Galipot Sylvain Gerber Martine Le Guilloux Florian Jabbour Catherine Damerval
author_sort	Pierre Galipot
title	Micro- and Macroscale Patterns of Petal Morphogenesis in Nigella damascena (Ranunculaceae) Revealed by Geometric Morphometrics and Cellular Analyses
title_short	Micro- and Macroscale Patterns of Petal Morphogenesis in Nigella damascena (Ranunculaceae) Revealed by Geometric Morphometrics and Cellular Analyses
title_full	Micro- and Macroscale Patterns of Petal Morphogenesis in Nigella damascena (Ranunculaceae) Revealed by Geometric Morphometrics and Cellular Analyses
title_fullStr	Micro- and Macroscale Patterns of Petal Morphogenesis in Nigella damascena (Ranunculaceae) Revealed by Geometric Morphometrics and Cellular Analyses
title_full_unstemmed	Micro- and Macroscale Patterns of Petal Morphogenesis in Nigella damascena (Ranunculaceae) Revealed by Geometric Morphometrics and Cellular Analyses
title_sort	micro- and macroscale patterns of petal morphogenesis in nigella damascena (ranunculaceae) revealed by geometric morphometrics and cellular analyses
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/da5fb79f38ed4527b2cd81e2ec5c5c6f
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Micro- and Macroscale Patterns of Petal Morphogenesis in Nigella damascena (Ranunculaceae) Revealed by Geometric Morphometrics and Cellular Analyses

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