Wie kommt es dass Moose so gut Wasser speichern können?
Die Wasseraufnahme erfolgt durch die gesamte Oberfläche der Moospflanze. Das Stämmchen hat nur eine geringe Leitungsfunktion, es dient hauptsächlich der Stabilität. Die Moosblättchen besitzen keine Wachsschicht (Kutikula) als Verdunstungsschutz. Moose können ihren Wasserhaushalt daher kaum regulieren.
Warum nennt man Moose auch pionierpflanzen?
Sobald wieder Feuchtigkeit in der Umwelt verfügbar ist, erwacht das Moos (wie Dornröschen) wieder zum Leben und setzt sein Wachstum fort. Moose sind ferner Pionierpflanzen, weil sie im Unterschied zu Gefäßpflanzen auch bei sehr niedrigen Temperaturen und wenig Licht Photosynthese betreiben können.
How are lichens and mosses related to each other?
Mosses are commonly confused with lichens, hornworts, and liverworts. Lichens may superficially look like mosses, and have common names that include the word „moss“ (e.g., „reindeer moss“ or „iceland moss“), but are not related to mosses.
How are mosses different from other vascular plants?
This contrasts with the pattern in all vascular plants ( seed plants and pteridophytes ), where the diploid sporophyte generation is dominant. Mosses reproduce using spores, not seeds, and have no flowers. Moss gametophytes have stems which may be simple or branched and upright or prostrate.
How are mosses different from other bryophytes?
By contrast, mosses and other bryophytes have only a single set of chromosomes and so are haploid (i.e. each chromosome exists in a unique copy within the cell). There is a period in the moss life cycle when they do have a double set of paired chromosomes, but this happens only during the sporophyte stage.
What kind of stems do Moss gametophytes have?
Moss gametophytes have stems which may be simple or branched and upright or prostrate. Their leaves are simple, usually only a single layer of cells with no internal air spaces, often with thicker midribs. They do not have proper roots, but have threadlike rhizoids that anchor them to their substrate.