Effect of IAA on spore germination and gametophyte development in Ceratopteris thalictroides (l.) brongn. from Sitamata Wild Life Sanctuary, Rajasthan

Specificity of the Antheridogen from Ceratopteris thalictroides (L.) Brongn.

Characteristics of the fern antheridogen from Ceratopteris thalictroides (L.) Brongn. are investigated. These are: (a) determination of molecular size (it is readily dialyzable), (b) pK(a) (about 5), (c) movement in thin layer chromatography, and (d) ability to induce dark germination of fern spores. These four characteristics are compared to the same characteristics of three other antheridogen...

effect of oral presentation on development of l2 learners grammar

this experimental study has been conducted to test the effect of oral presentation on the development of l2 learners grammar. but this oral presentation is not merely a deductive instruction of grammatical points, in this presentation two hypotheses of krashen (input and low filter hypotheses), stevicks viewpoints on grammar explanation and correction and widdowsons opinion on limited use of l1...

Spore germination and gametophyte development of Cyathea atrovirens (Langsd. & Fisch.) Domin (Cyatheaceae) under different pH conditions.

Cyathea atrovirens (Langsd. & Fisch.) Domin, an intensely exploited tree fern, is found inside forests in several succession stages, as well as in swamps, roadsides and unused fields in the Rio dos Sinos basin, in the state of Rio Grande do Sul, southern Brazil. This study evaluated the in vitro germination and gametophyte development of C. atrovirens under different pH conditions, as well as s...

Ecophysiology of Development: Spore Germination

Ecophysiology of Development: Spore Germination