
handle: 11388/262705
Genistaapomixis is described for the first time in two populations ofGenista salzmanniiDC.: the first is diploid and the second one tetraploid. There was no female meiosis and the megaspore mother cell functioned as an unreduced megaspore, which led to the matureAntennariatype embryo sac. A hybrid origin hypothesis for the species was made.Viene messo in evidenza per la prima volta un caso di apomissia nel genereGenista. Infatti dallo studio di due popolazioni, una diploide ed una tetraploide, diG. salzmanniiè risultato che il sacco embrionale si origina per diplosporia mitotica di tipoAntennaria. La microsporogenesi, che decorre in modo normale, produce granuli di polline abbondanti nel biotipo tetraploide, e scarsi in quello diploide per fenomeni degenerativi dopo la formazione della tetraspora.Vengono fatte ipotesi sulla probabile origine ibridogena della specie e sulla differenziazione delle altre specie dell'aggregatumG. aspalathoides.
Embriology; apomixis;Genista salzmanniiDC.Embriologia; apomissia;Genista salzmanniiDC.
Embriology; apomixis;Genista salzmanniiDC.Embriologia; apomissia;Genista salzmanniiDC.
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 0 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
