Cytokinins induce photomorphogenic development in dark-grown gametophytes of ceratopteris richardii mark d spiro 1, behzad torabi and catharine n cornell. Ceratopteris thalictroides brongn [family parkeriaceae] filed as acrostichum thalictroides l [family pteridaceae. Iii physiological and bioinformatic studies on polarity development in ceratopteris richardii spores by stephen charles stout, bs, ms dissertation presented to the faculty of the graduate school of. Proc natl acad sci usa vol 95, pp 6222-6227, may 1998 evolution characterization of mads homeotic genes in the fern ceratopteris richardii. Furthermore, fluorescent in situ hybridization (fish) studies detected two major rdna loci and six more weakly hybridizing signals in the genome of the diploid homosporous fern ceratopteris richardii (m c g rath and h ickok 1999) these studies are consistent with the view that the genome of homosporous ferns consists of duplicated genes that.
A third species, ceratopteris richardii, can only be discerned from c thalictroides and c cornuta by the number of spores per sporangium moreover, ceratopteris species are known to hybridise c thalictroides is a very fast growing fern and is usually cultivated free-floating on the water surface, like all other ceratopteris species. Isolation and analysis of ceratopteris richardii antheridiogen c 1 isolation and analysis of ceratopteris richardii antheridiogen c adham alifarag submitted to the committee on undergraduate honors of baruch honors college. The gametophyte generation of ceratopteris richardii is being used in a number of laboratories as a model plant system for developmental studies (chasan, 1992) the influence of gravity and light on developmental polarity of single cells of ceratopteris richardii gametophytes. C-fern is a specially derived cultivar of a tropical fern, ceratopteris richardii over a three-week period, c-fern develops from a single-celled spore into a complex.
Profiling gene expression during early gametophyte development and sex determination in ceratopteris richardii a dissertation submitted to the faculty of purdue. Ceratopteris richardii 'c-fern' spores, purchased from carolina biological supply company (burlington, usa), were sterilized and cultured as described in the 'c. The programming of sexual phenotype in the homosporous fern ceratopteris richardii jo ann banks, leslie hickok, and mary alice webb. Ceratopteris richardii, a diploid, homosporous fern has been advanced as a model fern system however, the tenuous ability to transform the genome of this fern greatly limited its usefulness as a model organism. Ultra violet radiation on sex determination in ceratopteris richardii essay sample ultraviolet (uv) radiation and its detrimental effects on plant life have been widely researched.
Regular paper the effects of light on sex determination in gametophytes of the fern ceratopteris richardii hiroyuki kamachi æ orie iwasawa æ leslie g hickok æ. The homosporous fern life cycle provides numerous advantages for experimental studies in particular, ceratopteris richardii, because of its rapid life cycle and ease of culture, is a useful model. Plant development & the fern life cycle: using ceratopteris richardii renzaglia, karen s and others american biology teacher, v57 n7 p438-42 oct 1995. Ceratopteris richardii is quite similar to c cornuta and can only safely be discerned by close examination of the spores this species is used as model organism in plant genetics this species is used as model organism in plant genetics. Auxin regulates lateral meristem activation in developing gametophytes of ceratopteris richardii michele gregorich and roxanne fisher abstract: this study investigates the auxin regulation of lateral meristem activation in the gametophytes of the fern.
—in the homosporous fern ceratopteris richardii, sex is not determined chromosomally rather, hermaphroditic gametophytes produce a hormone called antheridiogen, which induces maleness in undifferentiated gametophytes the percentage of males increases with increasing density of gametophytes. Introduction haploid gametophytes of many homosporous ferns, including ceratopteris richardii, develop as males or hermaphrodites the choice between these alternative developmental fates is. Hosted by the usgs core science analytics and synthesis page designed through the cooperative efforts of interagency itis teams point of contact: [email protected] Dent that the fern ceratopteris richardii provides remarkable opportunities for developmental, physiological, genetic, and, with any luck, molecular studies of. Regeneration in the fern ceratopteris richardii the demonstration of crosstalk between sugar signaling and the hor- mone ethylene signaling in angiosperms prompted us to test the effects of this hormone in combination with sugar on.
Computational prediction and qpcr validation of mirna in ceratopteris richardii yevgeniy kharonov submitted to the committee on undergraduate honors of baruch honors college. This work describes a rare high-throughput evaluation of gene expression changes induced by space flight in a single plant cell the cell evaluated is the spore of the fern ceratopteris richardii, which exhibits both perception and response to gravity cdna microarray and q rt-pcr analysis of. In the fern ceratopteris richardii james r eberle' and jo ann banks department of botany and plant pathology, lilly hall of life sciences, purdue university, west lafayette, indiana 47906.
Scott rj, hickok lg (1991) inheritance and characterization of a dark-germinating, light-inhibited mutant in the fern ceratopteris richardii. Here, we report a transgenic analysis in the fern ceratopteris richardii that reveals a role for leafy in maintaining cell divisions in the apical stem cells of both haploid and diploid phases of the lifecycle. Ebscohost serves thousands of libraries with premium essays, articles and other content including plant development & the fern life cycle using ceratopteris richardii.