Results 151 to 160 of about 1,986 (176)

Ulva lactuca (Chlorophyta Ulvales) as co-feed for Pacific white shrimp

Journal of Applied Phycology, 2016
The expansion of shrimp farming is limited by dependency on fish meal and fish oil as the main sources of protein and lipids. Alternative sources of protein could decrease production costs, making shrimp farming more sustainable. Therefore, this paper aimed to evaluate the growth performance of Litopenaeus vannamei (formerly Penaeus vannamei), also ...
Mariane Fontoura Pallaoro, Felipe do Nascimento Vieira, Leila Hayashi   +2 more
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Chemical composition and 13C NMR spectroscopic characterisation of ulvans from Ulva (Ulvales, Chlorophyta)

Journal of Applied Phycology, 1999
The chemical composition and structures of several ulvan extracts isolated from various Ulva species were studied. They were all composed mainly of rhamnose, glucuronic acid, xylose, glucose and sulphate with smaller amounts of iduronic acid and traces of galactose. Proteins were also present, most likely as contaminants.
Lahaye, Marc, Alvarez-Cabal Cimadevilla, Enrique, Kuhlenkamp, Ralph, Quemener, Bernard, Lognoné, Vincent, Dion, Patrick   +5 more
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Ultrastructure and taxonomy of the genusEndophyton(Ulvales, Ulvophyceae)

European Journal of Phycology, 1997
Fine structure of vegetative cells, development and morphology of sporangia and general morphology of zoospores were studied for the first time in the genus Endophyton Gardner. Vegetative cells contained one parietal perforate chloroplast with 2–4 ulvophycean pyrenoids and transverse cell walls without plasmodesmata. Sporangial walls were formed by two
P. I. Leonardi, J. A. Correa, E. J. Cáceres   +2 more
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Cryopreservation of gametophytic thalli of Ulva prolifera (Ulvales, Chlorophyta) from Korea

Journal of Applied Phycology, 2015
Cryopreservation is needed to ensure long-term storage without any genetic drift and contamination. To conserve Ulva species, gametophytic thalli of Ulva prolifera (Chlorophyta) were first cryopreserved at −196 °C using the two-step cooling method with cooling rate of 1 °C min−1 to −40 °C. Three cryoprotectants (dimethyl sulfoxide (DMSO), glycerol, and
Ye Nee Lee, Ki Wan Nam
openaire   +1 more source

Asexual life history by quadriflagellate swarmers of Ulva spinulosa (Ulvales, Ulvophyceae)

Phycological Research, 2003
SUMMARY This is the first report of a Ulva species reproducing asexually solely by quadriflagellate swarmers. Ulva spinulosa Okamura et Segawa specimens were collected from Ukibuchi on the Pacific coast of Kochi Prefecture, southern Japan. Quadriflagellate swarmers were released from these specimens.
Masanori Hiraoka, Satoshi Shimada, Masao Ohno, Yukihiko Serisawa   +3 more
openaire   +1 more source

Parasexual fusion products in green algae: Enteromorpha and Ulvaria (Ulvales, Chlorophyta)

Hydrobiologia, 1990
Enteromorpha linza and Ulvaria oxysperma in North Carolina reproduce exclusively by asexual zoospores. Calcofluor white staining indicated that newly released zoospores lack significant cellulose cell wall material, making them suitable for treatment as protoplasts in a parasexual fusion process using high pH-Ca2+, PEG and centrifugation.
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A molecular systematic study of Ulva (Ulvaceae, Ulvales) from the northeast Pacific

Phycologia, 2004
Abstract Species delineation in the genus Ulva is difficult due to a lack of distinguishing morphological characters and the high degree of phenotypic plasticity observed in these algae; thus, species descriptions are necessarily based on a limited set of characters.
Hillary S. Hayden, J. Robert Waaland
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Differential responses to cadmium induced oxidative stress in marine macroalga Ulva lactuca (Ulvales, Chlorophyta)

BioMetals, 2010
This study describes various biochemical processes involved in the mitigation of cadmium toxicity in green alga Ulva lactuca. The plants when exposed to 0.4 mM CdCl(2) for 4 days showed twofold increase in lipoperoxides and H(2)O(2) content that collectively decreased the growth and photosynthetic pigments by almost 30% over the control. The activities
Manoj, Kumar, Puja, Kumari, Vishal, Gupta, P A, Anisha, C R K, Reddy, Bhavanath, Jha   +5 more
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Microscopic observation of pyrenoids in Order Ulvales (Chlorophyta) collected from Qingdao coast

Journal of Ocean University of China, 2011
Pyrenoids found in green algae Order Ulvales have taxonomical significance. Their morphology, microstructure, and the location and number in the cells have been widely used as identification criteria. As these traits can be affected by environmental conditions, it is necessary to look for other different characteristics. Here pyrenoids in several algae
Linhong Teng, Lanping Ding, Qinqin Lu
openaire   +1 more source

Copper induction of phosphorus deficiency inUlva fasciata(Ulvales, Chlorophyta)

Phycologia, 2005
Abstract The effects of Cu2+ on phosphorus (P) availability in Ulva fasciata Delile were studied by exposure to CuSO4 (0–100 µM) added in the nutrient-enriched artificial seawater media for 8 days. The growth rate decreased as medium Cu2+ contents increased, 50% growth inhibition was achieved at 9.8 µM Cu2+ (850 µg l−1).
Tse-Min Lee, Ya-Ling Huang, Meng-Hsien Chen   +2 more
openaire   +1 more source