NDLI: A defective pollen-pistil interaction contributes to hamper seed set in the parthenocarpic fruit tomato mutant

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Hormonal status of the pollen-pistil system at the progamic phase of fertilization after compatible and incompatible pollination in Petunia hybrida L.

Generation and analysis of expressed sequence tags from almond (Prunus dulcis Mill.) pistils

Plant Reproduction : Volume 16, Issue 3, September 2003

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A defective pollen-pistil interaction contributes to hamper seed set in the parthenocarpic fruit tomato mutant

Content Provider	Springer Nature Link
Author	Mazzucato, A. Olimpieri, I. Ciampolini, F. Cresti, M. Soressi, G. P.
Copyright Year	2003
Abstract	In the parthenocarpic fruit (pat) tomato mutant, parthenocarpy is associated with partial aberrations of stamens (shortness and carpelloidy) and ovules (defective integument growth) that contribute to impair seed set. However, these do not seem to be the only reasons for seed infertility because hand-pollination fails to restore seed set in ovaries where a fraction of the ovules are still morphologically normal. Therefore, it is conceivable that other unreported defects occur during the reproductive process in the mutant. In this research, we show that the mutation does not affect pollen or embryo sac development and viability, but generates sporophytic effects that reduce seed production and seed size. While pollen germination and stylar growth were normal in mutant pistils, fertilization does not take place because of abnormalities in the pollen tube-ovary interaction in this genotype. Inside the ovary of pat plants, pollen tubes appeared to be disorientated; they wandered about in the ovarian cavity and often lost their adherence to the placental surface. Interestingly, in pat ovaries fertilization was strongly impaired even in those ovules that appeared normal. It may be that apparently 'normal' ovules cannot guide pollen tubes to their micropyle in the altered pat ovary because adhesion molecules are not properly arrayed on a placenta that is already preparing for cell division or, alternatively, chemotropic signals in the pat ovary may be altered by the presence of aberrant ovules, which are not simply devoid of attractivity, but disrupt pollen tube guidance overall.
Starting Page	157
Ending Page	164
Page Count	8
File Format	PDF
ISSN	09340882
Journal	Plant Reproduction
Volume Number	16
Issue Number	4
e-ISSN	14322145
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-09-12
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Lycopersicon esculentum Parthenocarpy Pollen-pistil interaction Seed set Tomato
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science

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