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Title

The effect of temperature on pollen germination, pollen tube growth, and stigmatic receptivity in peach

AuthorsHedhly, Afif ORCID; Hormaza Urroz, José Ignacio ; Herrero Romero, María CSIC ORCID
KeywordsPollen germination
Pollen tube growth
Prunus persica
Stigmatic receptivity
Temperature stress
Issue DateSep-2005
PublisherThieme
CitationPlant biol (Stuttg) 2005; 7: 476-483
AbstractTemperature is a major climatic factor that limits geographical distribution of plant species, and the reproductive phase has proven to be one of the most temperature-vulnerable stages. Here, we have used peach to evaluate the effect of temperature on some processes of the progamic phase, from pollination to the arrival of pollen tubes in the ovary. Within the range of temperatures studied, 20 °C in the laboratory and, on average, 5.7 °C in the field, the results show an accelerating effect of increasing temperature on pollen germination and pollen tube growth kinetics, as well as an increase in the number of pollen tubes that reach the style base. For the last two parameters, although the range of temperature registered in the field was much lower, the results obtained in the laboratory paralleled those obtained in the field. Increasing temperatures drastically reduced stigmatic receptivity. Reduction was sequential, with stigmas first losing the capacity to sustain pollen tube penetration to the transmitting tissue, then their capacity to offer support for pollen germination and, finally, their capacity to support pollen grain adhesion. Within a species-specific range of temperature, this apparent opposite effect of temperature on the male and female side could provide plants with the plasticity to withstand changing environmental effects, ensuring a good level of fertilization.
DescriptionThe definitive version is available at: http://www.thieme.de/fz/plantbiology/
Publisher version (URL)http://www.thieme-connect.de/ejournals/html/plantbiology/doi/10.1055/s-2005-865850
URIhttp://hdl.handle.net/10261/15843
DOI10.1055/s-2005-865850
ISSN1435-8603
E-ISSN1438-8677
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(IHSM) Artículos

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