Results 21 to 30 of about 21,396 (266)

Evolutionary ecology of nectar [PDF]

open access: yesAnnals of Botany, 2018
Floral nectar is an important determinant of plant-pollinator interactions and an integral component of pollination syndromes, suggesting it is under pollinator-mediated selection. However, compared to floral display traits, we know little about the evolutionary ecology of nectar.
Amy L, Parachnowitsch   +2 more
openaire   +2 more sources

Project Selection and Transparency Factors in Housing Public-Private Partnerships in Nigeria

open access: yesConstruction Economics and Building, 2018
The application of Public-Private Partners (PPPs) in housing provisioning is on the increase across the world. However, there is a paucity of empirical studies on the specific factors considered at the initiation, and measures taken to ensure ...
Eziyi Offia Ibem   +2 more
doaj   +1 more source

Comparative analyses of the metabolite and ion concentrations in nectar, nectaries, and leaves of 36 bromeliads with different photosynthesis and pollinator types

open access: yesFrontiers in Plant Science, 2022
Floral nectar contains mainly sugars as well as smaller amounts of amino acids and further compounds. The nectar composition varies between different plant species and it is related to the pollination type of the plant. In addition to this, other factors
Thomas Göttlinger, Gertrud Lohaus
doaj   +1 more source

Comparison of sugars, iridoid glycosides and amino acids in nectar and phloem sap of Maurandya barclayana, Lophospermum erubescens, and Brassica napus. [PDF]

open access: yesPLoS ONE, 2014
BACKGROUND: Floral nectar contains sugars and amino acids to attract pollinators. In addition, nectar also contains different secondary compounds, but little is understood about their origin or function. Does nectar composition reflect phloem composition,
Gertrud Lohaus, Michael Schwerdtfeger
doaj   +1 more source

Floral nectar guide patterns discourage nectar robbing by bumble bees. [PDF]

open access: yesPLoS ONE, 2013
Floral displays are under selection to both attract pollinators and deter antagonists. Here we show that a common floral trait, a nectar guide pattern, alters the behavior of bees that can act opportunistically as both pollinators and as antagonists ...
Anne S Leonard   +3 more
doaj   +1 more source

Floral Nectar Chemistry in Orchids: A Short Review and Meta-Analysis

open access: yesPlants, 2021
Nectar is one of the most important flower traits, shaping plant–pollinator interactions and reproductive success. Despite Orchidaceae including numerous nectariferous species, nectar chemistry in this family has been infrequently studied. Therefore, the
Emilia Brzosko, Paweł Mirski
doaj   +1 more source

The effect of nectar production to the gathering behaviour of honeybees and to the foraging activity of wild bees at apple flowers

open access: yesInternational Journal of Horticultural Science, 2006
Intensity of bee visitation (honeybees and wild bees), foraging behaviour of honeybees and nectar parameters (nectar production, sugar concentration, sugar content in nectars) were inspected at 18 apple cultivars for three consecutive years.
P. Benedek, K. Finta
doaj   +1 more source

Nectar-Sipping Birds [PDF]

open access: yesNature, 1922
THE device of Mirafra Assamica to reach the nectar in the flowers of Castanospermum (noted in NATURE of April 15, p. 489) has its parallel among British birds. The blooms of several Asiatic species of rhododendron contain much honey, and many of these are defaced at this season by the great tit (Parus major), the blue tit (P.
openaire   +2 more sources

Patterns of Nectar Production in Asclepias curassavica (Apocynaceae))

open access: yesJournal of Pollination Ecology, 2019
Milkweeds are important nectar resources for insects in the New World. In addition, nectar is the germination medium for milkweed pollen. This study is the first controlled, greenhouse examination of patterns of nectar production in a milkweed species ...
Steven Broyles
doaj   +1 more source

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