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Computer simulation of bidimensional growth of the gametophyte of Anemia phyllitidis (L.) Sw.

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Analysis of the different cytomorphogenetic phases of the gametophyte of Anemia phyllitidis (L.) Sw. has shown that prothallial development of this fern follows a regular process. This led us to model the morphogenesis of the prothallus. In this context, using the formal language theory whose

Calmodulin-like protein from the fern Anemia phyllitidis L. Sw.

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Spores and prothallia of the fern Anemia phyllitidis L. Sw. contain a protein which in its physicochemical properties corresponds largely to calmodulin. It shows immunoreactivity with a calmodulin antiserum and activates bovine brain phosphodiesterase. Its content increases during the early

Anemia phyllitidis: Inducibility of Physiological State Antagonistic to Antheridium Formation.

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It has been reported that a preparation obtained from prothlalli of the fern species Anemia phyllitidis controls antheridium formation in this species. If this same preparation is applied at the spore stage it induces a physiological state antagonistic to antheridium formation. The inhibitory state

Aphidicolin Inhibition of DNA Synthesis and Germination in Spores of Anemia phyllitidis L. Sw.

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Aphidicolin inhibits DNA synthesis and nuclear division in spores of Anemia phyllitidis. In spite of blocked DNA replication, spores germinate under continuous dark conditions, if induced by addition of 5 x 10(-5) grams per milliliter gibberellic acid. Differentiation of aphidicolin-treated

[Effect of terpenoid derivatives (helminthosporol, helminthosporic acid, dihydrohelminthosporic acid, and steviol) on antheridinum induction in Anemia phyllitidis].

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Helminthosporol, helminthosporic acid, dihydrohelminthosporic acid, and steviol have been tested for their ability to induce antheridium formation in Anemia phyllitidis. All helminthosporol derivatives posses a limited but real activity. Steviol proved to be inactive.All the substance tested have a

Comparative development of heavily asymmetric-cordate gametophytes of Anemia phyllitidis (Anemiaceae) focusing on meristem behavior.

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Development of heavily asymmetric cordate gametophytes of Anemia phyllitidis (Anemiaceae), one of the schizaeoid ferns, was examined using a sequential observation technique; epi-illuminated light micrographs of the same growing gametophytes were taken approximately every 24 h. The apical cell-like

Isolation, characterization and sequence of a cDNA encoding gamma-tubulin protein from the fern Anemia phyllitidis L. Sw.

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A complete cDNA encoding gamma-tubulin protein from Anemia phyllitidis is presented. The deduced amino acid sequence shows an average similarity of 81-86% to known gamma-tubulin genes from insects, mammals and fungi. Northern blots indicate the existence of transcripts of ca. 1.9 kb which are

Ethylene is a positive regulator for GA3-induced male sex in Anemia phyllitidis gametophytes.

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Effects of the ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC) on the development and expression of male sex were tested using the model of the three-zonal structure of 12-day-old (15-celled) Anemia phyllitidis gametophyte. ACC at 10 microM concentration enhanced the number of

Aminooxyacetic acid inhibits antheridiogenesis and development of Anemia phyllitidis gametophytes.

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Cytomorphological studies of the development of young fern gametophytes (Anemia phyllitidis) have been used to investigate combined effects of gibberellic acid and ethylene on male sex expression. ACC (the key by-product in ethylene biosynthesis pathway) was found to exert a synergetic effect on the

Gibberellins and Antheridiogens in Prothallia and Sporophytes of Anemia phyllitidis.

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The following gibberellins (GAs) and antheridiogens were identified by their mass spectra and Kovats retention indices from combined gas chromatography-mass spectrometry of purified extracts of the prothallia and sporophytes of Anemia phyllitidis, a Schizaeaceous fern: a trace amount of GA9

In vivo phytochrome difference spectrum from dark grown gametophytes of anemia phyllitidis L. Sw. Treated with norflurazon.

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An in vivo phytochrome difference spectrum of dark grown Anemia phyllitidis L. Sw. gametophytes has been measured. The spectral characteristics estimated from the difference spectrum were as follows: red maximum at 662 nanometers, far red maximum at 737 nanometers, isosbestic point at 695

[Effect of inhibitors of DNA-, RNA-, and protein synthesis on growth and antheridium formation in Anemia phyllitidis].

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A number of inhibitors of DNA-, RNA-, and protein synthesis were applied to prothallia of Anemia phyllitidis, and their effects were investigated with regard to cell division and inhibition of antheridium formation (after induction by gibberellin A3). All compounds tested cause a significant

Factors Influencing Spore Germination and Early Gametophyte Development in Anemia mexicana and Anemia phyllitidis.

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Spores of Anemia mexicana Klotzsch and Anemia phyllitidis (L.) Swartz were tested comparatively to investigate the effects of various treatments on spore germination and early gametophyte development in light and darkness. The optimum pH for induction of spore germination is approximately 6. Both

Detection and partial sequence of phytochrome genes in the ferns Anemia phyllitidis (L.)Sw (Schizaeaceae) and Dryopteris filix-mas L. (Polypodiaceae) by using polymerase-chain reaction technology.

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Phytochrome controls several developmental steps during formation and differentiation of the fern gametophyte, including spore germination, morphogenesis of the gametophyte or differentiation of the sexual cells. To obtain information about the amino acid sequence and the regulation of phytochrome

PCR-dependent amplification and sequence characterization of partial cDNAs encoding myosin-like proteins in Anemia phyllitidis (L.) Sw. and Arabidopsis thaliana (L.) Heynh.

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Partial cDNAs encoding for myosin-like proteins from Anemia phyllitidis and Arabidopsis thaliana have been isolated using PCR technology. The deduced amino acid sequences show an average similarity up to 62% with known myosin heavy chain genes. From northern blot analysis we were able to estimate

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