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Influence of the pistil on pollen tube kinetics in peach (Prunus persica)

AuthorsHerrero Romero, María ; Arbeloa Matute, Arancha
Issue Date1989
PublisherBotanical Society of America
John Wiley & Sons
CitationAmerican Journal of Botany 76 (10): 1441-1447 (1989)
AbstractPollen tube growth has been studied in peach and has been related to changes in the pistil structures which the pollen tube has to traverse in its way from the stigma down to the ovule. Growth of the pollen tubes along the pistil is not continuous. While pollen tubes reach the base of the style 7 days after pollination, fertilization does not take place until 12 days later. Pollen tubes stop for 5 days at the top of the obturator and they further stop for 3 days before entering the ovule. The pollen tube growth is heterotrophic; starch, present all along the pistilar tract at anthesis, vanishes as the pollen tubes pass by. Discontinuous pollen tube growth appears to be controlled by the pistil. At anthesis the pistil is not fully matured. Maturation of the pistil implies a number of secretory processes that occur in a basipetal way starting from the stigma down to the style and ending in the ovule. Some of these secretions at the stigma and the style are triggered by pollination; others appear to be a maturative stage of the pistil and are produced in a discrete way. The fact that the pollen tube depends on these secretions together with the fact that these secretions are not continuously produced confer upon the pistil a role of controlling pollen tube kinetics and point out that, for a successful fertilization, male gametophyte development and pistil maturation need to by synchronized.
Description7 Pags.
Publisher version (URL)https://doi.org/10.1002/j.1537-2197.1989.tb15124.x
Appears in Collections:(EEAD) Artículos
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