Results 151 to 160 of about 716,421 (197)
Some of the next articles are maybe not open access.
Journal of Apicultural Research, 1984
SummaryNectar secretion was studied in dandelion growing in a crested wheat-grass field in the Peace River region of Alberta, Canada. The average number of flowers produced daily in an area 1 m2 was 59·2 in 1981 and 8·9 in 1982. Most flowers opened in the morning and closed in the afternoon.
openaire +1 more source
SummaryNectar secretion was studied in dandelion growing in a crested wheat-grass field in the Peace River region of Alberta, Canada. The average number of flowers produced daily in an area 1 m2 was 59·2 in 1981 and 8·9 in 1982. Most flowers opened in the morning and closed in the afternoon.
openaire +1 more source
Nectary Structure, Nectar Secretion Patterns and Nectar Composition in Two Helleborus Species
Plant Biology, 1999Abstract: The morphological and cytological characteristics of nectaries of Helleborus foetidus and H. bocconei during the secretory period are reported. The nectaries are derived from modified petals and secrete nectar continuously for about 20 days; they consist of a single layered epidermis, nectar‐producing parenchyma and photosynthesizing ...
VESPRINI J. L., NEPI M., PACINI E.
openaire +3 more sources
Dilute Nectar in Dry Atmospheres: Nectar Secretion Patterns in Aloe castanea (Asphodelaceae)
International Journal of Plant Sciences, 2005Aloe species commonly flower during the winter dry season in southern Africa and produce abundant dilute nectar. We investigated variability in nectar production and availability in Aloe castanea because evaporation is more likely from its open flowers than from the tubular flowers of most other Aloe species.
NICOLSON S., NEPI M.
openaire +2 more sources
Annals of Botany
BACKGROUND AND AIMS Extrafloral nectaries are nectar-secreting structures present on vegetative parts of the plants which provide indirect defences against herbivore attack.
Shobhon Paul, A. Mitra
semanticscholar +1 more source
BACKGROUND AND AIMS Extrafloral nectaries are nectar-secreting structures present on vegetative parts of the plants which provide indirect defences against herbivore attack.
Shobhon Paul, A. Mitra
semanticscholar +1 more source
1982
Nectar is a sugar-rich solution transported from the phloem, through a specialized nectary tissue, to the outside of the plant.
openaire +1 more source
Nectar is a sugar-rich solution transported from the phloem, through a specialized nectary tissue, to the outside of the plant.
openaire +1 more source
Effects of Herbicides on Nectar Secretion
Journal of Apicultural Research, 1964SUMMARYApplications of 2,4-D in amounts lethal to the plant inhibited nectar secretion in poinsettias (Euphorbia pulcherrima), usually within two days. Applications of amitrole did not inhibit nectar secretion, and the nectar contained a normal amount of total sugars.The nectar secreted by plants treated with 2,4-D contained an auxin-like substance ...
openaire +1 more source
Environmental and Experimental Botany, 2018
Floral longevity can vary substantially with temperature in a given plant species. Thermal time has been widely used to measure developmental age of plants and poikilothermic organisms. We tested whether thermal time was suitable to express flower age to
S. Chabert +4 more
semanticscholar +1 more source
Floral longevity can vary substantially with temperature in a given plant species. Thermal time has been widely used to measure developmental age of plants and poikilothermic organisms. We tested whether thermal time was suitable to express flower age to
S. Chabert +4 more
semanticscholar +1 more source
Intrapopulation variation in nectar secretion in Impatiens capensis
Oecologia, 1984Variation in nectar secretion rates within a population of Impatiens capensis was examined. There was no evidence for phenotypic variation between plants in nectar secretion rates. There was significant daily variation in secretion rates, which appeared to be caused by environmental factors.
openaire +2 more sources
Nectar Secretion of the Tuliptree or Yellow Poplar
Journal of Economic Entomology, 1933Because of the large amount of nectar flow observed from the tuliptree (Lirodendron tulipifera) , an experiment was undertaken to determine the quantity of nectar secreted per blossom and the sugar content of this nectar. The average weight of nectar secreted by one flower was 1.6417 grams.
openaire +1 more source
Nectar Storage in Relation to Wax Secretion by Honeybees
Journal of Apicultural Research, 1988SummaryExperiments were performed to assess nectar forage and the availability of empty combs as well as free building space within the nest cavity in relation to wax secretion. There was a positive correlation between engorgement of the honey stomach and wax secretion.
H. R. Hepburn, P. C. Magnuson
openaire +1 more source