نتایج جستجو برای: ferns
تعداد نتایج: 2275 فیلتر نتایج به سال:
A rainforest in southwest Ireland offers Rory Hodd the chance to discover unusual specimens of ferns and other flora.
Manuscript electronical Premise of research. Ferns (monilophytes) and lycophytes are unique among land plants in having two independent life stages: the gametophyte generation, which is generally small, cordiform, and short-lived, senescing after fertilization, and the sporophyte generation, which is considered the dominant, long-lived portion of the life cycle produced following fertilization....
This paper proposes a parallel joint boosting method that simultaneously estimates poses and face landmarks. The proposed method iteratively updates the poses and face landmarks through a cascade of parallel random ferns in a forward stage-wise manner. At each stage, the pose and face landmark estimates are updated: pose probabilities are updated based on previous face landmark estimates and fa...
Tracheids, vessels and sieve tubes are found in the vascular tissue of the plant. • Tracheids and vessels are found in the xylem tissue and conduct water and dissolved mineral ions from the roots to the aerial parts of the plant. • Sieve tubes are found in the phloem tissue and conduct organic solutes, for example, sugars and amino acids, up and down the plant, from where they are synthesised t...
Arsenic (As) is a pollutant of major concern throughout the world, and causes serious environmental problems in many areas including, for example, West Bengal, Bangladesh, and Vietnam. Phytoremediation is potentially a cost-effective and environmentally benign method of extracting pollutants from soils for which there have been significant recent advances for As. In particular, the discovery of...
The morphology of a Glomus-like fungus-host interaction in chlorophyllous gametophytes and young apogamic sporophytes of Dryopteris muenchii A.R. Sm. was studied from ferns cultivated in laboratory, using soil as substrate. An aseptate fungus colonized the gametophytes' tissue through the rhizoids, developing vesicles. The fungus penetrated the young sporophytes primary roots by developing appr...
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