homospory

(redirected from homosporous)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

homospory

[hə′mäs·pə·rē]
(botany)
Production of only one kind of asexual spore.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Mentioned in ?
References in periodicals archive ?
Genetic map-based analysis of genome structure in the homosporous fern Ceratopteris richardii.
Isozyme markers allowed much more accumulation of genetic insights to understand the mating system and consequences of outcrossing as a main mechanism favouring intergametophytic mating in the main homosporous fern lineages, in contrast to previous inbreeding assumptions (Soltis & Soltis 1990, Jimenez et al.
The origin of such high chromosome number was a matter of debate and two hypotheses were proposed, as it was said before: one suggesting that homosporous ferns are true polyploids, resulting from repeated cycles of polyploidy, followed by a process of diploidization with a massive gene silencing; while the other, suggested that they are true diploids having achieved high chromosome numbers via other mechanisms (Barrington et al.
Autogamous allohomoploidy in Alsophila and Nephelea (Cyatheaceae): A new hypothesis for speciation in homoploid homosporous ferns.
These include 13 extant homosporous filicaleans, 17 extinct homosporous and heterosporous ferns from Paleozoic strata, five extant and one extinct heterosporous leptosporangiate ferns, two extant marattiaceous ferns, two extant ophioglossaceous ferns, one extant and two extinct equisetophytes, both extant homosporous psilotophytes (i.e., Psilotum and Tmesipteris), one extinct heterosporous progymnosperm, three extinct and one extant seed plants, and the extinct homosporous trimerophyte Psilophyton crenulatum (Appendix 1).
In Fern Clade #1 the homosporous species Stauropteris oldhamia is sister to the heterosporous species Gillesplea randolphensis + Stauropteris burntislandica.
We anticipate that future analyses which combine morphological data from living and fossil species will prove equally valuable for resolving familial relationships among families of homosporous leptosporangiate ferns.
adiantum-nigrum, combined with the fact that its parents are not found in Hawaii, provides a unique opportunity to explore the possibility of multiple colonizations of this homosporous fern onto the archipelago and, therefore, to assess the likelihood of continued dispersal between Hawaiian and non-Hawaiian conspecific populations.
The sporophytes of most homosporous ferns behave as short-lived perennials, with mean generation times of approximately 5 to 20 yr (pers.
Some aspects of reproductive biology of the gametophyte generation of homosporous ferns.