Zephyranthes grandiflora

Mary Sue Ittner msittner@mcn.org
Fri, 25 Jan 2013 08:59:01 PST
Note: This email was sent to the wrong address yesterday and I just 
now noticed it so am forwarding it to the list.

In my experience, Z. grandiflora is seed-sterile and 
pollen-fertile.  The question is whether the species is 
self-incompatible, or if something is wrong with the embryo sacs, or 
even if there has been a change in the gametic DNA imprinting so that 
it is not able to produce endosperm.  A clearing study with methyl 
salicylate or an optimized mixture of butyl benzoate and dibutyl 
phthalate could easily determine if the embryo sacs are mature and 
structurally normal at anthesis, but it would require a specialized 
differential interference-contrast or confocal microscope. Such a 
study could also determine if fertilization and incipient endosperm 
divisions occur before the ovary aborts.
       Also in my experience, Z. macrosiphon flowers are similar to 
Z. grandiflora, except for the stigmatic placement.  This apomictic 
species sets maternal seed abundantly and does not offset like Z. grandiflora.

Charles Crane

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