| 翻訳と辞書 |
Peltigera
''Peltigera'' is a genus of approximately 91 species of foliose lichens in the family Peltigeraceae. Commonly known as the dog lichen, lichens of ''Peltigera'' are often terricolous (growing on soil), but can also occur on moss, trees, rocks, and many other substrates in many parts of the world.
Most ''Peltigera'' species have the cyanobacterium ''Nostoc'' as the dominant phytobiont but some have the chlorophyte ''Coccomyxa'' in which case they also have small gall-like growths containing ''Nostoc''. Because of their ability to fix nitrogen from the atmosphere, such lichens are influential in soil composition and generation.
==Description==
Species of ''Peltigera'' are foliose, with broad lobed thalli. Although the size of the thalli is variable and species-dependent, in some species the thalli can grow quite large, up to 30 cm in diameter.〔Vitikainen O. (1994). (1998). Taxonomic notes on neotropical species of ''Pelitgera''. In: Lichenology in Latin America: history, current knowledge and applications. Edited by M. P. Marcelli, and M.R.D. Seaward. CETESB, Companhia de Tecnologia de Saneamento Ambiental, Estado de Sao Paulo. pp. 135-139.〕 The color of the upper surface may range from drab gray, brown or greenish. Lower surfaces are typically ''without'' a cortex (unlike other foliose lichens),〔Fioliose lichens, Lichen Thallus Types, Allan Silverside, ()〕 and cottony, often with fungal hyphae fused to form a network of veins. The reproductive structures isidia, soredia or lobules may be present in some species.
All species of ''Peltigera'' associate with the nitrogen-fixing cyanobacteria ''Nostoc''.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Peltigera」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|