منابع مشابه
Mycorrhizal diversity in photosynthetic terrestrial orchids
• Specific orchid–fungal associations are known for nonphotosynthetic orchids but fungal diversity in photosynthetic orchids is thought to be quite broad. Specific fungal associations will figure prominently in conservation efforts, while diverse associations may require less attention. We combined culture techniques with ITS and mtLSU sequences and phylogenetic analysis to determine the geneti...
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Cloud forests harbor high levels of orchid diversity. However, due to the high fragmentation of these forests in the Andes, combined with the pressure for new agricultural land, orchid diversity is highly threatened. Despite this worrying scenario, few studies have assessed the effects of habitat loss specifically on orchid assemblages in the Andes. The aim of this study was to analyze the edge...
متن کاملGenome size diversity in orchids: consequences and evolution.
BACKGROUND The amount of DNA comprising the genome of an organism (its genome size) varies a remarkable 40 000-fold across eukaryotes, yet most groups are characterized by much narrower ranges (e.g. 14-fold in gymnosperms, 3- to 4-fold in mammals). Angiosperms stand out as one of the most variable groups with genome sizes varying nearly 2000-fold. Nevertheless within angiosperms the majority of...
متن کاملOrchids
aperture in the tissues surrounding the meristems. 'This simple experiment revealed that there were four distinct regions of the embryo with different plasmodesmata apertures. The shoot meristem had the highest aperture enabling movement of single-to-triple sized GFP; the hypocotyl (embryonic stem) allowed single, double and some triple-sized GFP movement; the root allowed single and double-siz...
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ORCHIDS is an intrusion detection tool based on techniques for fast, on-line model-checking. ORCHIDS detects complex, correlated strands of events with very low overhead in practice, although its detection algorithm has worstcase exponential time complexity. The purpose of this paper is twofold. First, we explain the salient features of the basic model-checking algorithm in an intuitive way, as...
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ژورنال
عنوان ژورنال: Plant Diversity
سال: 2018
ISSN: 2468-2659
DOI: 10.1016/j.pld.2018.06.003