scholarly journals Aging effect on nectar production in two clones of Asclepias syriaca

Oecologia ◽  
1983 ◽  
Vol 56 (1) ◽  
pp. 121-125 ◽  
Author(s):  
A. K. Southwick ◽  
E. E. Southwick
Keyword(s):  
Aging Effect ◽  
Asclepias Syriaca ◽  
Nectar Production

scholarly journals The melliferous potential of apiflora of southwestern Vojvodina (Serbia)

2016 ◽  
Vol 68 (1) ◽  
pp. 81-91 ◽  
Author(s):  
Marina Macukanovic-Jocic ◽  
Snezana Jaric
Keyword(s):  
Trifolium Pratense ◽  
Food Resource ◽  
Lythrum Salicaria ◽  
Cirsium Arvense ◽  
Asclepias Syriaca ◽  
Ruderal Vegetation ◽  
Nectar Production ◽  
The Individual ◽  
Number Percentage ◽  
Percentage Abundance

The individual and community-level melliferous potential of apiflora was evaluated in southwestern Vojvodina in order to assess its significance and contribution to the bee pasture. Seven plant communities belonging to ruderal, segetal and floodplain type of vegetation, with a total of 279 plant species were registered. Apifloristic and phytocoenological investigations included the determination and analysis of honey plants using the following parameters: total number, percentage, abundance and frequency of these species in the communities, as well as their intensity of pollen and nectar production. The coenotic coefficient of melliferousness (CCm) indicating the melliferous potential of each community, was calculated based on the above parameters. Although the greatest number of melliferous species was found in the ass. Chenopodio-Ambrosietum artemisiifoliae (132), the highest percentage (80%) of them was registered in the ass. Consolido-Polygonetum avicularis. Considering the coefficients of nectar and pollen production, the most valuable honey plants commonly present in the majority of communities were: Cirsium arvense, Rubus caesius, Lythrum salicaria, Daucus carota, Trifolium pratense, Dipsacus laciniatus, Medicago sativa, Asclepias syriaca, Cichorium intybus and Taraxacum officinale. The low abundance and frequency of melliferous species within the Consolido-Polygonetum avicularis, Polygonetum convolvulo-avicularis and Populetum nigrae-albae communities indicated their poor contribution to the bee pasture. Within ruderal vegetation, the highest CCm was registered in Amorpho-Typhaetum, providing, theoretically, the richest food resource for the honeybees in the investigated area.

Flower-visitors, nectar production, and inflorescence size of Asclepias syriaca

1979 ◽  
Vol 57 (12) ◽  
pp. 1380-1388 ◽  
Author(s):  
M. F. Willson ◽  
R. I. Bertin
Keyword(s):  
Honey Bees ◽  
Native Species ◽  
Flowering Phenology ◽  
Spatial And Temporal Variation ◽  
Floral Display ◽  
Asclepias Syriaca ◽  
Nectar Production ◽  
Inflorescence Size ◽  
Visitation Rates ◽  
The Common

Spatial and temporal variation in insect visitation rates are analyzed with respect to nectar production and inflorescence size of Asclepias syriaca L., the common milkweed. Nectar sugar production peaked in the afternoon and evening but this trend was not paralleled by visitations of native insects (either vectors or thieves). The main pollinia vectors were noctuid moths at night and honey bees (Apis mellifera) in the afternoon. Vector visitation rates were highest at the beginning (native species) or middle (total vectors) of the blooming season, declining markedly toward the end, probably as a result of decreasing frequencies of A. syriaca flowers. Large inflorescences attracted more vectors and more thieves and a higher proportion of all visits were made by vectors but the species composition of visitors did not usually change with inflorescence size. We discuss the possibility that honey bees may provide major 'new' selection pressures on floral display, nectar production patterns, and flowering phenology in the common milkweed.

Effectiveness of diurnal and nocturnal pollination of two milkweeds

1980 ◽  
Vol 58 (16) ◽  
pp. 1744-1746 ◽  
Author(s):  
Robert I. Bertin ◽  
Mary F. Willson
Keyword(s):  
Reproductive Success ◽  
Plant Species ◽  
Seed Set ◽  
Relative Effectiveness ◽  
Asclepias Syriaca ◽  
Nectar Production ◽  
Selective Abortion ◽  
Nocturnal Pollinators ◽  
Diurnal Species

The relative effectiveness of diurnal and nocturnal pollinators of two milkweed species, Asclepias syriaca and A. vcerticillata, was assessed experimentally and related to patterns of nectar production. Nocturnal pollinators inserted and removed fewer pollinia than diurnal vectors but caused equal pod set, and in A. syriaca, caused greater seed set. We suggest that observed peak nectar production patterns are adaptive in attracting nocturnal pollinators that may be of higher quality than diurnal species. This is one of the first attempts to compare the relative effectiveness of diurnal and nocturnal pollinators of any plant species. The excess of vector visits over that needed to obtain maximum pod set may allow selective abortion and (or) be adaptive in increasing reproductive success through pollinia donation.

ENVIRONMENTAL INFLUENCES ON NECTAR PRODUCTION IN MILKWEEDS (ASCLEPIAS SYRIACA AND A. EXALTATA)

1992 ◽  
Vol 79 (6) ◽  
pp. 636-642 ◽  
Author(s):  
Robert Wyatt ◽  
Steven B. Broyles ◽  
Gregory S. Derda
Keyword(s):  
Environmental Influences ◽  
Asclepias Syriaca ◽  
Nectar Production

RESEARCH ON PREPARATION OF  GAMMA ORYZANOL ANTI-AGING CREAM

2017 ◽  
pp. 15-21
Author(s):  
Thi Minh Nguyet Le ◽  
Thi Kim Lien Phan
Keyword(s):  
Product Quality ◽  
Rice Bran ◽  
Rice Bran Oil ◽  
Aging Effect ◽  
Triterpene Alcohols ◽  
Beneficial Effects ◽  
Long Time ◽  
Formulation Parameters ◽  
Rice Water ◽  
Gamma Oryzanol

Background and Objectives: For a long time, Asian women have known to use rice water, rice bran for skin care, lightening dark spots and slowing down the aging process. Gamma Oryzanol, an ester mixture of trans-ferulic acid with phytosterols and triterpene alcohols extracted from rice bran oil, has been shown to have beneficial effects on the skin, especially its antioxidant and anti-aging effect. The aims of this research were to formulate Gamma Oryzanol-loaded anti-aging cream and to evaluate the product quality. Materials and Methods: Gamma Oryzanol was imported from Japan. Some formulation parameters such as emulsifi-ers, performance modifiers were investigated and the product quality was evaluated according to the criteria of drugs and cosmetics. Results: The excipients were chosen including 1% (w/w) of Lunamer with 3% (w/w) of Prolipid as emulsifiers and 8% (w/w) of mango seed butter as a state modifier in the formulation of Gamma Oryzanol anti-aging cream. The cream is ivory-white, thick, smooth, fragrant-smelling and satisfied all criteria of developed specification. Conclusion: The study was successful in the preparation of Gamma Oryzanol anti-aging cream. Key words: Gamma Oryzanol, anti-aging cream, Franz cells.

Influence of Phenotype, Season, and Time‐of‐day on Nectar Production in Cotton 1

Crop Science ◽  
1981 ◽  
Vol 21 (4) ◽  
pp. 507-511 ◽  
Author(s):  
Gordon D. Waller ◽  
F. D. Wilson ◽  
Joseph H. Martin
Keyword(s):  
Time Of Day ◽  
Nectar Production

Anti‐aging effect of an oral disintegrating collagen film: a prospective, single‐arm study

2021 ◽  
Author(s):  
Young In Lee ◽  
Sang Gyu Lee ◽  
Eunbin Kim ◽  
Inhee Jung ◽  
Jangmi Suk ◽  
...  
Keyword(s):  
Aging Effect ◽  
Collagen Film

scholarly journals The Age-Sensitive Efficacy of Calorie Restriction on Mitochondrial Biogenesis and mtDNA Damage in Rat Liver

2021 ◽  
Vol 22 (4) ◽  
pp. 1665
Author(s):  
Guglielmina Chimienti ◽  
Anna Picca ◽  
Flavio Fracasso ◽  
Francesco Russo ◽  
Antonella Orlando ◽  
...  
Keyword(s):  
Calorie Restriction ◽  
Citrate Synthase ◽  
Aging Effect ◽  
Mtdna Damage ◽  
Mitochondrial Markers ◽  
Age Related ◽  
Efficacious Treatment ◽  
Mtdna Deletion ◽  
Cyt C ◽  
Ad Libitum

Calorie restriction (CR) is the most efficacious treatment to delay the onset of age-related changes such as mitochondrial dysfunction. However, the sensitivity of mitochondrial markers to CR and the age-related boundaries of CR efficacy are not fully elucidated. We used liver samples from ad libitum-fed (AL) rats divided in: 18-month-old (AL-18), 28-month-old (AL-28), and 32-month-old (AL-32) groups, and from CR-treated (CR) 28-month-old (CR-28) and 32-month-old (CR-32) counterparts to assay the effect of CR on several mitochondrial markers. The age-related decreases in citrate synthase activity, in TFAM, MFN2, and DRP1 protein amounts and in the mtDNA content in the AL-28 group were prevented in CR-28 counterparts. Accordingly, CR reduced oxidative mtDNA damage assessed through the incidence of oxidized purines at specific mtDNA regions in CR-28 animals. These findings support the anti-aging effect of CR up to 28 months. Conversely, the protein amounts of LonP1, Cyt c, OGG1, and APE1 and the 4.8 Kb mtDNA deletion content were not affected in CR-28 rats. The absence of significant differences between the AL-32 values and the CR-32 counterparts suggests an age-related boundary of CR efficacy at this age. However, this only partially curtails the CR benefits in counteracting the generalized aging decline and the related mitochondrial involvement.

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