Results 351 to 360 of about 125,543 (397)

Nectar

Encyclopedia of Social Insects, 2020
Sue Nicolson
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Floral nectar production: what cost to a plant?

Biological Reviews of The Cambridge Philosophical Society, 2023
Floral nectar production is central to plant pollination, and hence to human wellbeing. As floral nectar is essentially a solution in water of various sugars, it is likely a valuable plant resource, especially in terms of energy, with plants experiencing
G. Pyke, Zongxin Ren
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Nectaries and Nectar

2007
Contributing Authors. Preface. 1. Introduction E. Pacini, S.W. Nicolson. 1.1 Evolutionary origins. 1.2 Secretions analogous to nectar. 1.3 Floral and extrafloral nectarines. 1.4 Nectar components. 1.5 Organization of this volume. 2. A Systematic Survey of Floral Nectaries G. Bernardello. 2.1 Introduction. 2.2 Nectaries in gymnosperms.
NICOLSON S., NEPI M., PACINI E.
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The complexity of nectar: secretion and resorption dynamically regulate nectar features [PDF]

Naturwissenschaften, 2007
In this paper, we review the phenomenon of nectar resorption, focusing on its physiological and ecological meaning. Nectar resorption is a phenomenon that has long been known but was rarely reported until the 1990s. It has more recently been demonstrated in several species by various direct and indirect methodologies. It has generally been demonstrated
NEPI M., STPICZYNSKA M.
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Nectar yeasts enhance the interaction between Clematis akebioides and its bumblebee pollinator.

Plant biology, 2019
It has been hypothesised that intense metabolism of nectar-inhabiting yeasts (NIY) may change nectar chemistry, including volatile profile, which may affect pollinator foraging behaviours and consequently plant fitness.
M. Yang, Guochid Deng, Y. Gong, S. Huang
semanticscholar   +1 more source

Secretion of Nectar [PDF]

, 1982
Nectar is a sugar-rich solution transported from the phloem, through a specialized nectary tissue, to the outside of the plant.
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Nectar Constituents of the Cactaceae

The Southwestern Naturalist, 1985
(Uploaded by Plazi for the Bat Literature Project) Thenectarconstitutionof 43 cactus species representingtaxa servicedby numerous pollinator classes is reportedwith respectto sugar concentration,sugar composition,and caloric content per flower. Sugar concentrations do not differ significantly among hawkmoth-, hummingbird-,and bat-visitedcactus flowers ...
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Calculating nectar production rates: residual nectar and optimal foraging

Oecologia, 1983
Bumblebees, when foraging for nectar in flowers of Aconitum columbianum, do not consistently drain them of reward. The amount of residual nectar varies among sites, times and species of bee. At times, residual nectar can be a significant percentage of total 24 h production strongly suggesting that, if nectar secretion rates are to be studied, flowers ...
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Iridoid glycosides in the nectar ofCatalpa speciosa are unpalatable to nectar thieves

Journal of Chemical Ecology, 1982
The floral nectar ofCatalpa speciosa has a chemical mechanism that limits thievery. A bioassay employing sphingid larvae,Ceratomia catalpae, shows that catalpa iridoid glycosides are present in the floral nectar. When potential nectar thieves are fed nectar, a sucrose solution of identical concentration, or a sucrose solution plus 0.4% catalpol and 0.4%
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Nectar collected with microcapillary tubes is less concentrated than total nectar in flowers with small nectar volumes

Australian Journal of Botany, 2011
Previous research indicated that microcapillary tubes greatly underestimated sugar present in flowers with low nectar volumes, but it was unclear whether tubes missed liquid nectar or whether sugar concentration in nectar they collected did not represent total sugar concentration in a flower.
Russell C. Schumann, Sophie Petit, Nadia Rubbo   +2 more
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