نتایج جستجو برای: mosses

تعداد نتایج: 3087  

Journal: :American journal of botany 2011
Ying Chang Sean W Graham

PREMISE OF THE STUDY Investigating the early diversification of major clades requires well-corroborated and accurate phylogenetic inferences. We examined the performance of a large set of plastid genes for inferring the broad phylogenetic backbone of mosses-the second largest major clade of land plants-and their nearest relatives. METHODS We surveyed 14-17 plastid genes from a broadly represe...

2017
Monica Suleiman Dunstan Polus Masundang Hiroyuki Akiyama

This paper reports the mosses from Crocker Range Park (CRP) in Sabah, Malaysian Borneo. In total, 293 species, three subspecies and eight varieties belonging to 118 genera and 36 families are reported. This represents about 40% and 47% of the species and infra-specific taxa reported from Borneo and Sabah, respectively. Out of these, six species are new records for Borneo, namely Barbella horrid...

Journal: :Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering 2012
Alicja Boryło Waldemar Nowicki Grzegorz Olszewski Bogdan Skwarzec

The activity of polonium (210)Po and uranium (234)U, (238)U radionuclides, as well as trace metals in mosses, collected from Sobieszewo Island area (northern Poland), were determined using the alpha spectrometry, AAS (atomic absorption spectrometry) and OES-ICP (atomic emission spectrometry with inductively coupled plasma). The concentrations of mercury (directly from the solid sample) were det...

Journal: :Nature 1871

Journal: :The New phytologist 2012
M R Turetsky B Bond-Lamberty E Euskirchen J Talbot S Frolking A D McGuire E-S Tuittila

Mosses in northern ecosystems are ubiquitous components of plant communities, and strongly influence nutrient, carbon and water cycling. We use literature review, synthesis and model simulations to explore the role of mosses in ecological stability and resilience. Moss community responses to disturbance showed all possible responses (increases, decreases, no change) within most disturbance cate...

Journal: :مرتع و آبخیزداری 0
فریبا علوی زاده دانشجوی کارشناسی ارشد مرتع داری، دانشکده منابع طبیعی و محیط زیست، دانشگاه فردوسی مشهد کمال الدین ناصری استادیار دانشکدة منابع طبیعی و محیط زیست، دانشگاه فردوسی مشهد علی گلکاریان استادیار دانشکده منابع طبیعی و محیط زیست، دانشگاه فردوسی مشهد علی طویلی دانشیار دانشکده منابع طبیعی، دانشگاه تهران

soil erosion is a main hazard in most area of the country specially in arid and semi-arid regions and itis very important because of sedimentation, pollution, increased flooding and its negative effects onsoil productivity. one of the features of arid and semi-arid areas is the presence of low cover ofvascular plants. these empty spaces are usually good niches for biological soil crusts or cryp...

Journal: :Molecules 2015
Laura Klavina Gunta Springe Vizma Nikolajeva Illia Martsinkevich Ilva Nakurte Diana Dzabijeva Iveta Steinberga

Mosses have been neglected as a study subject for a long time. Recent research shows that mosses contain remarkable and unique substances with high biological activity. The aim of this study, accordingly, was to analyze the composition of mosses and to screen their antimicrobial and anticancer activity. The total concentration of polyphenols and carbohydrates, the amount of dry residue and the ...

Journal: :American journal of botany 2004
Jonathan Shaw Karen Renzaglia

The bryophytes comprise three phyla of embryophytes that are well established to occupy the first nodes among extant lineages in the land-plant tree of life. The three bryophyte groups (hornworts, liverworts, mosses) may not form a monophyletic clade, but they share life history features including dominant free-living gametophytes and matrotrophic monosporangiate sporophytes. Because of their u...

2004
JONATHAN SHAW KAREN RENZAGLIA

The bryophytes comprise three phyla of embryophytes that are well established to occupy the first nodes among extant lineages in the land-plant tree of life. The three bryophyte groups (hornworts, liverworts, mosses) may not form a monophyletic clade, but they share life history features including dominant free-living gametophytes and matrotrophic monosporangiate sporophytes. Because of their u...

Journal: :Current Biology 2004
John J. Tyson

a haploid organism directly leads to an altered phenotype, making forward and reverse genetic approaches more straightforward in haploid moss than in diploid seed plants. A major additional asset of mosses came from the discovery that, in the moss Physcomitrella patens, recombination occurs between DNA introduced into cells by transfection and homologous sequences in its nuclear DNA. This occur...

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