George R. Stilwell, Jr.
GRSJr at WORLDNET.ATT.NET
Thu Jul 19 15:26:58 CEST 2007
>Even if selfed with protection (preventing the intrusion of foreign
>pollen), the resulting seedlings will not be clones. Some plants produce
>seed without actual fertilization, through a process called pseudogamous
>apomixis, which is a specialized form of vegetative reproduction referred
>to as agamospermy. This process, often mistaken for "self-pollination,''
>initiates seed production by diffusing growth substances from its own or
>foreign pollen and proceeds without the usual chromosome cycle of
>reduction divisions and fertilization. In other words the hormones in the
>pollen stimulate the ova to produce seed, which lacks any of the genetic
>material of the stimulant pollen since it bypasses fertilization. The
>resulting seedlings are true clones of the mother plant and mirror the
>mother plants genes. One example is Hosta ventricosa but there are others.
>I have not heard nor read of agamospermy in Araceae. Perhaps our experts
>can elucidate on this. George
I seem to recall a discussion about apomixis on Arisaema-L at sometime in
the past, and a look a the archives turned up the following series of
If anything significant has surfaced since then, I'm not aware of it.
50 S. Prestwick Ct.
Dover, Delaware 19904, USA
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