Osservazioni sulla meiosi in cellule madri del polline di <i>Vitis vinifera</i> L. (cv. Barbera) diploide e tetraploide
DOI:
https://doi.org/10.5073/vitis.1984.23.195-201Abstract
Sono state osservate in Barbera diploide e mutato (tetraploide e chimera periclinale 2n-4n) le varie fasi della meiosi a partire dalle cellule madri del polline fino alla formazione del polline stesso.
E' stata evidenziata una certa incidenza di appaiamenti anomali in entrambi i mutanti e, al termine della meiosi, si sono potuti osservare tetradi con granuli soprannumerari.
Il polline delle piante mutate, presentante per lo più 4 pori, possiede una capacità germinativa ridotta rispetto al testimone.
Investigations on meiosis in pollen mother cells of diploid and tetraploid Vitis vinifera L. cv. Barbera
The different stages of meiosis have been investigated in diploid and mutated Vitis vinifera cv. Barbera (a tetraploid and a periclinal chimera 2n-4n) concerning the pollen mother cells.
Some incidence of anomalous coupling in both mutants has been pointed out, and tetrades with extra grains can be observed at the end of meiosis.
Pollen grains from mutated plants have generally 4 pores and show with respect to the control a reduced germinability.
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