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Protistas reproduccion asexual artificial


Gracilaria chilensis GracilarialesRhodophyta. Directory of Open Access Journals Sweden. Se compara este proceso con el descrito en otras especies de la clase.

Red seaweed Gracilariaone of the largest genus in Division Rhodophyta inhabits Sarawak coastal water.

This study was designed to identify the species of Gracilaria using morphological approach and to assess selected water quality parameters in Gracilaria habitats. Three field samplings were carried out in Santubong and Asajaya, Sarawak from November to December Overall, three species were identified namely Gracilaria changiiG.

In addition, three different taxa of aquatic macroinvertebrates polychaete, small crab, bivalve and single species of red seaweed Acanthophora sp. The study had provided better information on identification of Gracilaria and their habitat in Sarawak. Future work involving DNA barcoding of each species is in progress. Cultivation of native seaweed Gracilaria domingensis Rhodophyta in Southern Brazil. Full Text Available The aim of this work Protistas reproduccion asexual artificial to study the cultivation of Gracilaria domingensis in a mussel farming urbanized area in Santa Protistas reproduccion asexual artificial, Brazil.

Relative growth rate was the parameter used to evaluate the cuttings attachment methods on the cultivation rope, cuttings density, cultivation period and cystocarpic versus unfertile thalli performance. The cultivation was feasible only when protected by net cages due to herbivory. The tie-tie attachment method presented the best results.

No differences were observed when "Protistas reproduccion asexual artificial" the cuttings densities and reproductive phase. Future studies should evaluate the cost-effectiveness of producing the species in net cages and its potential as biofilter.

The general distribution of the subgenus for Central America, both Pacific and Atlantic, displays a disjunct pattern explainable based on the geologic vicariant events that interrupted the connection between Pacific and Atlantic at the Isthmuses of Panama closed 3.

Overall, three species were identified namely Gracilaria changii, G. Transcriptome profiling of sulfate deprivation responses in two agarophytes Gracilaria changii and Gracilaria salicornia Rhodophyta.

Los protistas son organismos unicelulares...

Seaweeds survive in marine waters with high sulfate concentration compared to those living at freshwater habitats. The cell wall polymer of Gracilaria spp. Since sulfation reduces the agar quality, it is interesting to investigate the effects of sulfate deprivation on the sulfate contents of seaweed and agar, as well as the metabolic pathways of these seaweeds. In this study, two agarophytes G.

Effects of solar and artificial...

Among the annotated DEGs were genes involved in putative agar biosynthesis, sulfur metabolism, metabolism of sulfur-containing amino acids, carbon metabolism and oxidative stress. These findings shed light on the sulfate deprivation responses in agarophytes and help to identify candidate genes involved in agar biosynthesis.

Codominant inheritance of polymorphic color variants of Gracilaria domingensis Gracilariales, Rhodophyta. Full Text Protistas reproduccion asexual artificial Agar is the most valuable phycocoloid in the world market. Currently, about half of its production is obtained from the red alga Gracilaria Gracilariales, Rhodophyta. Consequently, this genus has been the subject of many studies worldwide.

A common green color variant of G. Crosses were performed to determine the mode of color inheritance. The results can be interpreted as the expression of a pair of codominant alleles, where the green and red phenotypes are homozygous, and the heterozygotes present a brownish color.

Heterozygous tetrasporophytes, at least until they are cm long, exhibit a parental influence on the female gametophyte, since the reddish-brown or greenish-brown color is dependent on the female parent color red or green.

Mixed reproductive phases, as well as specimens with patches of different colors bearing spermatangia or cystocarps, were observed in laboratory cultures. Gametophytes that resulted from in situ germination of Protistas reproduccion asexual artificial were also observed, and could be easily detected when red or green gametophytes were grown on brown tetrasporophytes.

Inhibition of photosynthesis in the microalga Chaetoceros curvisetus Bacillariophyta by macroalga Gracilaria lemaneiformis Rhodophyta. We investigated the effects of dried macroalga Gracilaria lemaneiformis Rhodophyta on photosynthesis of the bloom-forming microalga Chaetoceros curvisetus. We measured the photosynthetic oxygen evolution rate and established the chlorophyll a fluorescence transient OJIP curve coupled with its specific parameters.

We observed concentration-dependent and time-dependent relationships between dried G. Co-culture with dried G. The dark respiration rate R d increased in C.

The JIP-test and the oxygen evolution results indicated that dried G. This result indicated that dried fragments of G. Effect of nutrient supply on photosynthesis and pigmentation to short-term stress UV radiation in Gracilaria conferta Rhodophyta.

N ratio and biomass yield were studied in tank cultivated Gracilaria conferta Rhodophyta. Electron transport rate ETR and biliprotein content were higher under high nutrient supply HNSobtained from fishpond effluents, compared to low nutrient supply LNSin contrast to mycosporine-like amino Protistas reproduccion asexual artificial MAAs dynamic.

Effective quantum yield decreased after short-term exposure to high irradiance whereas full recovery in shade was produced only under slightly heat shock. UVA radiation provoked an additional decrease in photosynthesis under high water temperature. Results support that nutrient-sufficiency "Protistas reproduccion asexual artificial" G. Delimitating cryptic species in the Gracilaria domingensis complex Gracilariaceae, Rhodophyta using molecular and morphological data.

Species in the genus Gracilaria that display conspicuously flattened vegetative morphologies are a taxonomically challenging group of marine benthic red algae. This is a result of their species richness, morphological similarity, and broad phenotypic plasticity.

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