sexual reproduction of the cape gooseberry biología reproductiva de la uchuva

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ID: 185462
2008
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Abstract
<span style="font-size: 10pt; font-family: Verdana">The objectives of the study were to determine the time of pollen and stigma ripening and to establish the kind of pollination in <em>Physalis</em>. This research was conducted in the Botana Farm at the University of Nariño, Colombia (2820 m a s l, 13 ° C, pluvial precipitation of 800 mm / year and relative humidity of 82%). <em>P. peruviana</em> took 37 days to anthesis, which took place between 7:00 and 10:00 am. In 85% of the flowers the first anther dehiscent was the day after the opening of the flower. The pollen grains showed 97% of viability to 35 days. Pollen matured before anthesis and stigma was receptive before the opening of the flower. Both, pollen and the pistil matured to 35 days of development, two days before anthesis; receptivity of the pistil was filed two days prior to anthesis, a phenomenon that restricts the self. The absence of vectors influenced pollination of <em>P. peruviana</em>. In emasculate flowers and subjected to self-pollination is introduced low fruit and seed formation, there was a differential response in pollination among samples inside the greenhouse. <em>P. peruviana</em> showed mixed pollination with 54% of cross-pollination.</span><span style="font-size: 10pt; font-family: Verdana"></span><span style="font-size: 10pt; font-family: Verdana">Key words:</span><span style="font-size: 10pt; font-family: Verdana"> <em>Physalis peruviana</em>; anthesis; self-pollination; cross-pollination.</span>
<span style="font-size: 10pt; font-family: Verdana">Los objetivos del trabajo fueron determinar la época de maduración del polen y del estigma y establecer el tipo de polinización de la uchuva en condiciones de invernadero con cinco genotipos de uchuva. La investigación se realizó en la Granja Botana de la Universidad de Nariño (2.820 msnm, 13°C, precipitación de 800 mm/año y humedad relativa de 82%). <em>P. peruviana</em> tomó 37 días para la apertura floral, la cual se efectuó entre las 7:00 a.m. y las 10:00 a.m. En el 85% de las flores la primera antera fue dehiscente al día siguiente de la apertura floral. Los granos de polen tuvieron 97% de viabilidad a los 35 días. El polen maduró antes de la antesis y el estigma fue receptivo antes de la apertura de la flor. Tanto el polen como el pistilo maduraron a los 35 días de desarrollo, dos días antes de la apertura floral; la receptividad del pistilo se presentó dos días antes de la antesis, fenómeno que restringe la autopolinización. En invernadero, la ausencia de vectores influyó en la polinización de <em>P. peruviana</em>. En flores emasculadas y sometidas a libre polinización se presentó baja formación de frutos y semillas, existió respuesta diferencial a la polinización dentro del invernadero entre las muestras evaluadas. <em>P. peruviana</em> presentó polinización mixta con 54% de polinización cruzada.</span><span style="font-size: 10pt; font-family: Verdana"></span><span style="font-size: 10pt; font-family: Verdana">Palabras claves:</span><span style="font-size: 10pt; font-family: Verdana"> <em>Physalis peruviana</em>; antesis; apertura floral; autopolinización; polinización cruzada.</span>
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Authors ;Muñoz Flórez Jaime Eduardo;Vallejo Cabrera Franco Alirio;Criollo Escobar Hernando;Lagos B Tulio César
Journal Rapid communications in mass spectrometry : RCM
Year 2008
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