Pollen morphology of Picolit grown in different Italian regions
DOI:
https://doi.org/10.5073/vitis.1980.19.201-206Abstract
Pollen grains of several biotypes of Picolit giallo, cultivated in different regions, have been studied by scanning and transmission electron microscopy.
Picolit giallo pollen grains appear acolporated (without furrows and germinative pores) in all the examined biotypes. Therefore, the absence of pores seems to be a genetic character, independent of rootstock productivity and provenance.
Contrary to Picolit giallo pollen grains, those of Picolit nero (a cultivar with high productivity) are tricolporated and consequently similar to pollen grains of Vitis cultivars with normal productivity.
Pollenmorphologie von Picolit aus verschiedenen italienischen Regionen
Die Pollenkörner mehrerer Biotypen von Picolit giallo wurden mittels Raster- und Transmissionselektronenmikroskop untersucht. Alle geprüften Pollenkörner waren acolporat, d. h. ungefurcht und porenlos. Man darf deshalb annehmen, daß es sich hierbei um ein genetisches Merkmal handelt, das von Pfropfpartner, Ertragsleistung und Herkunft unabhängig ist.
Im Gegensatz zu Picolit-giallo-Pollen besitzen die Pollenkörner von Picolit nero (eine reichtragende rotbeerige Rebensorte) wie die Pollenkörner von Rebsorten normaler Fruchtbarkeit drei Keimfurchen.
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