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Effects of light and nutrients on different germination phases of the Cosmopolitan moss Bryum argenteum Hedw. (Bryaceae) BABT
Silva,Adaíses Simone Maciel da; Pôrto,Kátia Cavalcanti; Simabukuro,Eliana Akie.
The influence of light and nutrients on the different germination phases of Bryum argenteum spores was studied. The following treatments were used: distilled water and nutrient solution under light (12 h) and continuous darkness. The spores germinated when exposed to light, independent of both medium used. Under darkness, the spores swelled and became chlorophyllous. In the presence of nutrient solution, the germination occurred earlier (after two days) when compared to the distilled water (after more than three days). Nutrients were needed to complete the last germination phase in the majority of spores and to provide the protonemal growth.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bryophyte; Physiology; Germination; Protonema; Light; Nutrients.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000400003
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Spore Germination and Protonemal Development of Dolichomitriopsis diversiformis BABT
Liu,Shibiao; Wei,Hua; Peng,Xiaolie; Li,Jing.
ABSTRACT Dolichomitriopsis diversiformis is an endemic and threatened moss in eastern Asia. In vitro culture and light microscopic observation were employed to study its developmental process from spore germination to the formation of young gametophyte, as well as effects of light and temperature on its spore germination and protonemal development. Microscopic observations revealed that its spores were positively photoblastic with exosporous germination, and sporelings were classified as the bryum-type. Light and dark conditions were compared to understand their effects on spore germination. In 24 h continuous illumination, all spores germinated in both 20 ℃ and 25 ℃. In contrast, in darkness at 20 ℃ from one to 30 days, spores did not germinate. However,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dolichomitriopsis diversiformis; Spore; Protonema; Light; Temperature.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100202
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Spore germination, early development and some notes on the effects of in vitro culture medium on Frullania ericoides (Nees) Mont. (Frullaniaceae, Marchantiophyta) Acta Botanica
Silva-e-Costa,Juliana da Costa; Luizi-Ponzo,Andrea Pereira; Resende,Cristiano Ferrara de; Peixoto,Paulo Henrique Pereira.
ABSTRACT In bryophytes, establishment can occur by a sexual or asexual process, but the production of spores enables colonization of a wider range of habitats and substrates than can asexual propagules. Successful germination is critical for establishment in a new environment. This paper addresses germination and sporeling development in Frullania ericoides, a leafy liverwort species. Fresh spores were inoculated in vitro in different culture strengths of Knop’s nutrient solution (one-fourth strength, half strength, full strength, one and a half strength and double strength), in order to evaluate the effects of this solution on spore germination and on the development of external protonema. On the first assessment, spore germination was observed at all the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endosporic development; Knop’s medium; Liverworts; Nutrients; Protonema; Sporeling.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000100019
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