نتایج جستجو برای: Characeae

تعداد نتایج: 123  

2011
Leeli AMON

The Characeae oospores are frequently found in sediment samples during Quaternary palaecological studies. Counts of oospores of three Estonian Late-glacial (14000 – 11500 calibrated year before present, cal y BP) sediment cores are presented and discussed. The first postglacial findings of Characeae oospores in Estonia date back 13900 cal y BP confirming the early appearance of Characeae in pos...

2014
Rosalina Stancheva John D. Hall Klaus Herburger Louise A. Lewis Richard M. McCourt Robert G. Sheath Andreas Holzinger

Characeae (Charophyceae, Charophyta) contains two tribes with six genera: tribe Chareae with four genera and tribe Nitelleae, which includes Tolypella and Nitella. This paper uses molecular and morphological data to elucidate the phylogeny of Tolypella species in North America. In the most comprehensive taxonomic treatment of Characeae, 16 Tolypella species worldwide were subsumed into two spec...

Journal: :Botanical Gazette 1880

Journal: :Shokubutsugaku Zasshi 1959

Journal: :New Zealand Journal of Botany 1977

Journal: :Annals of Botany 1887

Journal: :Bulletin of the Torrey Botanical Club 1898

Journal: :Plant & cell physiology 2002
Teruo Shimmen Ako Yamamoto

Characean cells develop alternating alkaline and acid bands on their surface upon illumination. However, the mechanism of band formation is not fully understood. In the present study, we succeeded in inducing a new alkaline band at an original acid band in internodal cells of Chara corallina. Chloroplasts in an acid band were locally removed by wounding the cell in the absence of the cell turgo...

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