Abstract
Summary The microsporogenesis of Rudbeckia laciniata L. is abnormal. The heterotypic division rests at the metaphase, by always giving »a restitution nucleus«. Such a nucleus divides itself (homeotypic division) often forming diads, very seldom triads, or monads (owing to a restitution nucleus also in homeotypic division, that is the formation of » a birestitution nucleus «, tetraploid). The ripe pollen is almost enterely degenerated. Many anomalies of degenerancy have been noticed. The formation of a birestitution nucleus is a new type of abnormal microsporogenesis: the »Rudbeckia laciniata type «.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Published version (
Free)
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
