المستودع الأكاديمي جامعة المدينة

Asynchronous development of stigmatic receptivity in the pear (Pyrus communis; Rosaceae) flower

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dc.creator Sanzol Sanz, Javier
dc.creator Rallo, Pilar
dc.creator Herrero Romero, María
dc.date 2008-05-08T07:01:39Z
dc.date 2008-05-08T07:01:39Z
dc.date 2003-01
dc.date.accessioned 2017-01-31T01:11:56Z
dc.date.available 2017-01-31T01:11:56Z
dc.identifier American Journal of Botany. 2003;90:78-84
dc.identifier 0002-9122 (print)
dc.identifier 1537-2197 (electronic)
dc.identifier http://hdl.handle.net/10261/4082
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/4082
dc.description The editor version is available at: http://www.amjbot.org/cgi/content/full/90/1/78
dc.description While stigma anatomy is well documented for a good number of species, little information is available on the acquisition and cessation of stigmatic receptivity. The aim of this work is to characterize the development of stigma receptivity, from anthesis to stigma degeneration, in the pentacarpellar pear (Pyrus communis) flower. Stigma development and stigmatic receptivity were monitored over two consecutive years, as the capacity of the stigmas to offer support for pollen germination and pollen tube growth. In an experiment where hand pollinations were delayed for specified times after anthesis, three different stigmatic developmental stages could be observed: (1) immature stigmas, which allow pollen adhesion but not hydration; (2) receptive stigmas, which allow proper pollen hydration and germination; and (3) degenerated stigmas, in which pollen hydrates and germinates properly, but pollen tube growth is impaired soon after germination. This developmental characterization showed that stigmas in different developmental stages coexist within a flower and that the acquisition and cessation of stigmatic receptivity by each carpel occur in a sequential manner. In this way, while the duration of stigmatic receptivity for each carpel is rather short, the flower has an expanded receptive period. This asynchronous period of receptivity for the different stigmas of a single flower is discussed as a strategy that could serve to maximize pollination resources under unreliable pollination conditions.
dc.description J. Sanzol was supported by an INIA fellowship and financial support for this work was also provided by INIA (Project grants SC98-049 and RTA 01-103).
dc.description Peer reviewed
dc.format 1175531 bytes
dc.format application/pdf
dc.language eng
dc.publisher Botanical Society of America
dc.rights openAccess
dc.subject Pollen germination
dc.subject Pyrus communis
dc.subject Rosaceae
dc.subject Stigma
dc.subject Stigmatic receptivity
dc.title Asynchronous development of stigmatic receptivity in the pear (Pyrus communis; Rosaceae) flower
dc.type Artículo


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