NDLI: Floral development of Urospatha: merosity and phylogeny in the Lasioideae (Araceae)

Content Provider	Springer Nature Link
Author	Barabé, Denis Lacroix, Christian Gibernau, Marc
Copyright Year	2011
Abstract	In this paper we study merosity in the genus Urospatha within the framework of a resolved phylogeny of the Araceae. We analyse how a transition from dimerous or tetramerous merosity to pentamerous or hexamerous merosity can occur developmentally in the Lasioideae. In Urospatha, initiation of floral primordia along the inflorescence is acropetal, while development of flowers is basipetal. This indicates the presence of two distinct phases in the development of the Urospatha inflorescence. The first phase corresponds to initiation of flowers and establishment of the phyllotactic pattern, and the second phase to differentiation of floral organs. Urospatha is characterized by the presence of trimerous, tetramerous, pentamerous and rarely hexamerous flowers. In all types of flowers, the stamens are closely associated and opposite to the tepals. Pentamerous flowers are formed by addition of a sector comprising a stamen and tepal. Likewise, in the case of hexamerous flowers, two sectors are added. In the Lasioideae, the increase in the number of tepals and stamens is linked with two developmental processes that have appeared independently in the subfamily: (1) addition of one or two stamen–petal sectors (Anaphyllopsis and Urospatha), and (2) independent increase in the number of tepals and stamens on whorls, more or less organized and inserted in alternate position (Dracontium). Tetramerous whorls as they occur in basal Lasioideae would be homologous to two dimerous whorls from an evolutionary point of view.
Starting Page	41
Ending Page	50
Page Count	10
File Format	PDF
ISSN	03782697
Journal	Plant Systematics and Evolution
Volume Number	296
Issue Number	1-2
e-ISSN	16156110
Language	English
Publisher	Springer Vienna
Publisher Date	2011-06-04
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Inflorescence Homeosis Angiosperms Systematic Morphogenetic constraints Plant Anatomy/Development Plant Sciences Plant Systematics/Taxonomy/Biogeography Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Ecology, Evolution, Behavior and Systematics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Homeosis, morphogenetic gradient and the determination of floral identity in the inflorescences ofPhilodendron solimoesense (Araceae)

Developmental morphology of the flower of Dracontium polyphyllum in the context of the phylogeny of the Araceae

Number of floral organs in Circaeaster agrestis (Circaeasteraceae) and possible homeosis among floral organs

Origin and variation of polymerous gynoecia in Fabaceae: evidence from floral mutants of pea (Pisum sativum L.)

Floral structure and ontogeny in Globba (Zingiberaceae)

Inflorescence and floral development in Ranunculus and three allied genera in Ranunculeae (Ranunculoideae, Ranunculaceae)

Stem anatomy of Philodendron Schott (Araceae) and its contribution to the systematics of the genus

The Immense Diversity of Floral Monosymmetry and Asymmetry Across Angiosperms

Floral biology of Schismatoglottis baangongensis (Araceae) in West Sarawak, Borneo

Floral development of Urospatha: merosity and phylogeny in the Lasioideae (Araceae)

Similar Documents

Homeosis, morphogenetic gradient and the determination of floral identity in the inflorescences ofPhilodendron solimoesense (Araceae)

Developmental morphology of the flower of Dracontium polyphyllum in the context of the phylogeny of the Araceae

Number of floral organs in Circaeaster agrestis (Circaeasteraceae) and possible homeosis among floral organs

Origin and variation of polymerous gynoecia in Fabaceae: evidence from floral mutants of pea (Pisum sativum L.)

Floral structure and ontogeny in Globba (Zingiberaceae)

Inflorescence and floral development in Ranunculus and three allied genera in Ranunculeae (Ranunculoideae, Ranunculaceae)

Stem anatomy of Philodendron Schott (Araceae) and its contribution to the systematics of the genus

The Immense Diversity of Floral Monosymmetry and Asymmetry Across Angiosperms

Floral biology of Schismatoglottis baangongensis (Araceae) in West Sarawak, Borneo

Floral development of Urospatha: merosity and phylogeny in the Lasioideae (Araceae)