ISSN:
1573-5176
Keywords:
Gracilaria
;
taxonomy
;
organellar DNA restriction
;
anatomy
;
chromosome number
;
interfertility
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Gracilaria chilensis Bird, McLachlanet Oliveira from Chile andG. sordida Nelson from New Zealand have been compared with respect to reproductive anatomy, chromosome number, interfertility, and organellar DNA restriction profiles. No differences were found in reproductive anatomy, which in these species is distinguished by deeptextorii-type spermatangial conceptacles and prominent tubular nutritive cells directed only to the floor of the cystocarp. The species share a chromosome number ofn = 24 and are readily interfertile. Electrophoretic profiles of organellar DNA digested with four different restriction endonucleases were virtually identical between the species except for bands that represented accompanying plasmids. However, previous research has indicated that the four plasmid bands inG. chilensis and the single one inG. sordida have a common origin. On these groundsG. chilensis andG. sordida are
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02180928
