scholarly journals Inhibitory effect of tea (Camellia sinensis (L.) O. Kuntze var. Sinensis) liquor/extract on blue-green algal growth.

2001 ◽  
Vol 62 (2) ◽  
pp. 115-122 ◽  
Author(s):  
Atsuko SASAO ◽  
Hiroshi MATSUO ◽  
Yoshito TANAKA
Keyword(s):  
Camellia Sinensis ◽  
Algal Growth ◽  
Inhibitory Effect ◽  
Green Algal

Only iron-limited cells of the cyanobacterium Anabaena flos-aquae inhibit growth of the green alga Chlamydomonas reinhardtii

2004 ◽  
Vol 82 (4) ◽  
pp. 436-442 ◽  
Author(s):  
Carlyn J Matz ◽  
Michael R Christensen ◽  
Auralee D Bone ◽  
Courtney D Gress ◽  
Scott B Widenmaier ◽  
...  
Keyword(s):  
Chlamydomonas Reinhardtii ◽  
Green Alga ◽  
Activated Charcoal ◽  
Algal Growth ◽  
Inhibitory Effect ◽  
The Other ◽  
Iron Limitation ◽  
Green Algal ◽  
Cyanobacterium Anabaena ◽  
Cobalt Copper

Cocultivation of iron-limited cells of the cyanobacterium Anabaena flos-aquae (Lyng.) Brèb. and the green alga Chlamydomonas reinhardtii Dangeard resulted in growth of Anabaena but not Chlamydomonas, even in the presence of excess exogenous iron. This effect was also observed during the cultivation of Chlamydomonas in a medium in which iron-limited Anabaena cells had been growing, but were removed prior to culture of Chlamydomonas. Conversely, iron-limited Chlamydomonas cells grew very well in medium from iron (nutrient)-sufficient, phosphate-limited, and nitrogen-limited Anabaena cultures. Iron-limited Anabaena cultures produced siderophores, while the other types of Anabaena cultures did not. Treatment of Anabaena iron-limited medium with activated charcoal completely removed the inhibitory effect on Chlamydomonas growth, and boiling the medium removed most of the inhibitory effect. Both the charcoal and the boiling treatments also removed siderophores from the medium. Partially purified Anabaena siderophore preparations were also inhibitory to Chlamydomonas growth. The inhibitory effect of iron-limited Anabaena medium could be partially overcome by addition of excess micronutrients (especially cobalt copper) but not by addition of iron. We suggest that Anabaena-derived siderophores, present only in iron-limited Anabaena medium, inhibit the growth of Chlamydomonas cells via a previously uncharacterized toxicity. This effect is different from previously described experiments in which cyanobacterial siderophores suppressed green algal growth via competition for limiting amounts of iron.Key words: Anabaena, Chlamydomonas, cocultivation, iron limitation, micronutrients; siderophores.

Specialized proteomic responses and an ancient photoprotection mechanism sustain marine green algal growth during phosphate limitation

2018 ◽  
Vol 3 (7) ◽  
pp. 781-790 ◽  
Author(s):  
Jian Guo ◽  
Susanne Wilken ◽  
Valeria Jimenez ◽  
Chang Jae Choi ◽  
Charles Ansong ◽  
...  
Keyword(s):  
Algal Growth ◽  
Phosphate Limitation ◽  
Green Algal ◽  
Proteomic Responses

Enhancement of Autotrophic Production by Nutrient Addition in a Coastal Rainforest Stream on Vancouver Island

1978 ◽  
Vol 35 (1) ◽  
pp. 28-34 ◽  
Author(s):  
John G. Stockner ◽  
K. R. S. Shortreed
Keyword(s):  
Algal Biomass ◽  
Algal Growth ◽  
N:P Ratio ◽  
Visual Observation ◽  
Nutrient Addition ◽  
Appreciable Effect ◽  
Blue Green Algae ◽  
Species Succession ◽  
Green Algal ◽  
Enrichment Experiments

In 1976 streamside nutrient-enrichment experiments were conducted using wooden troughs. Tripling of the PO4-P concentration, with or without a similar increase of NO3-N, increased algal biomass on the troughs by 8 times after 35 days. Increasing NO3-N alone had no appreciable effect on algal growth. A sloughing of algal biomass in August 1976 is believed to have been due to the instability of the heavy algal mat on the troughs and to the very poor light conditions that prevailed throughout August. Visual observation indicated that the relatively heavy algal population in Carnation Creek rapidly declined concurrent with the decline in the troughs. The percentage of diatoms in the algal assemblage remained the same in all troughs, and Fragilaria vaucheriae replaced Achnanthes minutissima as dominant on the phosphorus enriched trough. No shift to green or blue-green algal dominated assemblages occurred despite alteration of the N:P ratio. The dynamics of species succession, distribution, and growth, with and without nutrient addition, are discussed. Key words: stream fertilization, autotrophic production, algal succession, N:P ratio, algal distribution, rainforest, algal biomass, diatoms, blue-green algae

Physiological Effects of Fluometuron on Some Unicellular Algae

Weed Science ◽  
1968 ◽  
Vol 16 (3) ◽  
pp. 296-299 ◽  
Author(s):  
H. C. Sikka ◽  
David Pramer
Keyword(s):  
Algal Growth ◽  
Chlorophyll Synthesis ◽  
Inhibitory Effect ◽  
Photosynthetic Oxygen Evolution ◽  
Physiological Effects ◽  
Unicellular Algae ◽  
Test Organisms ◽  
Photosynthetic Oxygen ◽  
And Function ◽  
Insight Into

Unicellular green algae were used as test organisms in experiments designed to provide an insight into the mode of action of 3-(m-trifluoromethylphenyl)-1,1-dimethylurea (fluometuron). Fluometuron suppressed the autotrophic growth of Chorella pyrenoidosa Chick (hereafter referred to as C. pyrenoidosa) and Euglena gracilis Klebs-strain ‘Z’ (hereafter referred to as Euglena) and the extent of inhibition was a function of herbicidal concentration. Euglena was less sensitive than C. pyrenoidosa. Treated cells contained less protein and chlorophyll than untreated cells, but the inhibitory effect of the herbicide on the algal growth was overcome when the organisms were grown heterotrophically. Fluometuron did not adversely influence respiration or the light-independent reactions that lead to the formation of chlorophyll or chloroplast precursors. It did interfere with the light-dependent or the greening process of chlorophyll synthesis and with photosynthetic oxygen evolution. Fluometuron appears to be selectively toxic to one or more light-mediated biochemical reactions required for the formation and function of photosynthetic pigments and organelles.

scholarly journals Chroococcalean blue green algae from the paddy fields of Satara District, Maharashtra, India

2020 ◽  
Vol 12 (14) ◽  
pp. 16979-16992
Author(s):  
Sharada Jagannath Ghadage ◽  
Vaneeta Chandrashekhar Karande
Keyword(s):  
Green Algae ◽  
Polar Region ◽  
Species Abundance ◽  
Algal Growth ◽  
Wide Distribution ◽  
Paddy Fields ◽  
Study Region ◽  
Blue Green Algae ◽  
Green Algal ◽  
The Family

Blue green algae are the photosynthetic prokaryotes representing a wide distribution in habitat, i.e., temperate, tropical, and polar region.  Paddy fields are the best studied aquatic ecosystems on earth which fulfill all the necessary demands required for blue green algal growth.  Blue green algal role in enhancement of paddy yield has been studied worldwide.  Sustainable utilization of an organism for community use depends on how successfully the ecology of that organism is understood.  Twenty-eight chroococcalean blue green algal taxa were recorded from the study area.  They were taxonomically investigated and found to belong to two families and 11 genera.   The first family Chroococcaceae was the largest family with 10 genera and 26 species while the second family Entophysalidaceae had only one genus and two species.  The genus Gloeocapsa from the family Chroococcaceae exhibited largest species diversity (21.42%), as well as taxa Chlorogloea fritschii of family Entophysalidaceae showed species abundance from the study area.  All heterocystous blue green algal forms are capable of fixation of atmospheric N2.  Many of the non-heterocystous or unicellular blue green algae also have the capacity of N2 fixation.  The taxonomical documentation of chroococcalean blue green algae provide information about such indigenous unicellular blue green algae which will help in the development of niche specific inoculants as biofertilizers for rice fields of the study region.  

Polyphenols Extracted from Black Tea (Camellia sinensis) Residue by Hot-Compressed Water and Their Inhibitory Effect on Pancreatic Lipasein vitro

2012 ◽  
Vol 77 (12) ◽  
pp. H254-H261 ◽  
Author(s):  
Naoki Yuda ◽  
Miyuki Tanaka ◽  
Manabu Suzuki ◽  
Yuzo Asano ◽  
Hiroshi Ochi ◽  
...  
Keyword(s):  
Camellia Sinensis ◽  
Black Tea ◽  
Inhibitory Effect ◽  
Hot Compressed Water

Flavonol glycosides and their α-glucosidase inhibitory effect from Camellia sinensis

2020 ◽  
Vol 35 ◽  
pp. 68-72 ◽  
Author(s):  
Nguyen Thi Cuc ◽  
Luu The Anh ◽  
Nguyen The Cuong ◽  
Nguyen Hoang Anh ◽  
Nguyen Xuan Nhiem ◽  
...  
Keyword(s):  
Camellia Sinensis ◽  
Inhibitory Effect ◽  
Flavonol Glycosides

scholarly journals Culturable Bacterial Community on Leaves of Assam Tea (Camellia sinensis var. assamica) in Thailand and Human Probiotic Potential of Isolated Bacillus spp.

2020 ◽  
Vol 8 (10) ◽  
pp. 1585 ◽  
Author(s):  
Patthanasak Rungsirivanich ◽  
Witsanu Supandee ◽  
Wirapong Futui ◽  
Vipanee Chumsai-Na-Ayudhya ◽  
Chaowarin Yodsombat ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Camellia Sinensis ◽  
Antibacterial Properties ◽  
Cell Surface Hydrophobicity ◽  
Vero Cells ◽  
Surface Hydrophobicity ◽  
Inhibitory Effect ◽  
Northern Thailand ◽  
Bacillus Spp ◽  
Assam Tea

Assam tea plants (Camellia sinensis var. assamica) or Miang are found in plantations and forests of Northern Thailand. Leaf fermentation has been performed for centuries, but little information is available about their associated microbial community. One hundred and fifty-seven bacterial isolates were isolated from 62 Assam tea leaf samples collected from 6 provinces of Northern Thailand and classified within the phyla of Firmicutes, Actinobacteria, and Proteobacteria. Phayao and Phrae provinces exhibited the highest and the lowest bacterial diversities, respectively. The bacterial community structural pattern demonstrated significant differences between the west and the east sides. Since some Bacillus spp. have been reported to be involved in fermented Miang, Bacillus spp. isolated in this study were chosen for further elucidation. Bacillus siamensis ML122-2 exhibited a growth inhibitory effect against Staphylococcus aureus ATCC 25923 and MRSA DMST 20625, and the highest survival ability in simulated gastric and intestinal fluids (32.3 and 99.7%, respectively), autoaggregation (93.2%), cell surface hydrophobicity (50.0%), and bacterial adherence with Vero cells (75.8% of the control Lactiplantibacillusplantarum FM03-1). This B. siamensis ML122-2 is a promising probiotic to be used in the food industry and seems to have potential antibacterial properties relevant for the treatment of antibiotic-resistant infections.

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