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Phenology and reproductive biology in cultivar ‘Judia’ (Castanea sativa Mill.)

BOTTA, Roberto
2010-01-01
2010
Inglese
contributo
2 - Congresso
I European Congress on Chestnut - Castanea 2009
Cuneo (Italy)
13-16 ottobre
Internazionale
Comitato scientifico
866
169
174
6
ACTA HORTICULTURAE
WOS:000313530000019
2-s2.0-77957201129
The present study aims at gaining better scientific knowledge on the floral biology of the cultivar ‘Judia’ (Castanea sativa). Pollination and embryo growth are strongly influenced by climatic conditions that vary from site to site at different altitudes and across years often being the main cause for the quantity and quality production variability. On the other hand, fertilization and the early embryo development are important stages that influence yield and quality of chestnuts including the polyspermy rate of the nut. In this study, phenological observations were carried out during flowering and nut growth in 2007 for defining the most appropriate dates for performing, in 2008, controlled pollinations and the sampling of inflorescences and young fruitlets. The aim was to study ovule development, fertilization and early embryogenesis in chestnut. The controlled pollinations of ‘Judia’ were done with pollen from ‘Negral’ and ‘Lada’, two compatible pollinator cultivars. Histological observations showed that around mid July ovules were developing and contained the megaspore mother cell. Flowers pollinated with ‘Negral’ showed mature ovules on the 3rd week of July while flowers pollinated with ‘Lada’ had mature ovules 5 days earlier. The influence of pollinator on polyspermy is still uncertain but the time of pollination appears to be critical to fruit formation.
PORTOGALLO
04-CONTRIBUTO IN ATTI DI CONVEGNO::04B-Conference paper in rivista
info:eu-repo/semantics/conferenceObject
7
none
Dinis L.T.; Ramos S.; Gomes-Laranjo J.; Peixoto F.; Vallania R.; Costa R.; Botta R.
273
04B-Conference paper in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/113272
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