Results 81 to 90 of about 3,583 (178)

Structure of the cuniculus nectary in Brassavola flagellaris Barb. Rodr. (Laeliinae Benth., Orchidaceae)

Acta Agrobotanica, 2012
To date, the structure of the cuniculus nectary has not been studied in detail. Furthermore, the secretory mechanism of such nectaries has not been investigated.
Małgorzata Stpiczyńska, Kevin L. Davis, Magdalena Kamińska   +2 more
doaj   +1 more source

Ultrastructural changes during nectar secretion from extrafloral nectaries of Pithecellobium dulce Benth. [PDF]

Protoplasma, 2023
Sivan P, Rao KS.
europepmc   +1 more source

Macronutrient composition in pollen affects development and survival in wild bees

Physiological Entomology, Volume 51, Issue 2, Page 350-362, June 2026.
Small carpenter bees (Ceratina calcarata) were reared on diets formulated with black poplar and dandelion pollen, while closely monitoring developmental metrics, lipid content and survival. Macronutrient analyses on both pollen types revealed dandelion pollen contained lower levels of protein, essential amino acids and several fatty acids, which ...
Khara W. Stephen, Sandra M. Rehan
wiley   +1 more source

Uncovering the Arabidopsis thaliana nectary transcriptome: investigation of differential gene expression in floral nectariferous tissues

BMC Plant Biology, 2009
Background Many flowering plants attract pollinators by offering a reward of floral nectar. Remarkably, the molecular events involved in the development of nectaries, the organs that produce nectar, as well as the synthesis and secretion of nectar itself,
Xu Wayne W, Kram Brian W, Carter Clay J
doaj   +1 more source

Nectar secretion in a dry habitat: structure of the nectary in two endangered Mexican species of Barkeria (Orchidaceae). [PDF]

PeerJ, 2021
Stpiczyńska M, Kamińska M, Davies KL.
europepmc   +1 more source

Update of the risk assessment on dioxins and dioxin‐like PCBs in feed and food

EFSA Journal, Volume 24, Issue 6, June 2026.
Abstract The European Commission asked EFSA to update its 2018 risk assessment on polychlorinated dibenzo‐p‐dioxins and dibenzofurans (PCDD/Fs) and dioxin‐like polychlorinated biphenyls (DL‐PCBs) in feed and food, based on the 2022 WHO Toxic Equivalency Factors (WHO2022‐TEFs).
EFSA Panel on Contaminants in the Food Chain (CONTAM Panel), Helle Katrine Knutsen, Agneta Åkesson, Vasileios Bampidis, Margherita Bignami, Laurent Bodin, James Kevin Chipman, Gisela Degen, Antonio Hernández‐Jerez, Tim Hofer, Christer Hogstrand, Stefano Landi, Jean‐Charles Leblanc, Kyriaki Machera, Evangelia Ntzani, Isabelle P. Oswald, Guido Rychen, Salomon Sand, Katharina Vejdovszky, Barbara Viviani, Jesús del Mazo, Andy Hart, Dieter Schrenk, José Cortiñas Abrahantes, Luisa Ramos Bordajandi, Francesca Riolo, Tuuli Tauriainen, Ron Hoogenboom   +27 more
wiley   +1 more source

Flower trade-offs derived from nectar investment in female reproduction of two Nicotiana species (Solanaceae)

Acta Botânica Brasílica
Animal-pollinated flowers may orient resources for competing activities, such as nectar production for attracting flower visitors but then saving nectar (through inhibiting nectar production or by final resorption) for the subsequent maturation of fruits
Leonardo Galetto, Francielle Paulina Araujo, Gabriel Grilli, Leonardo D. Amarilla, Carolina Torres, Marlies Sazima   +5 more
doaj   +1 more source

NECTAR PRODUCTION AND POLLEN YIELD OF Echium vulgare L. IN THE CLIMATIC CONDITIONS OF LUBLIN

Acta Scientiarum Polonorum: Hortorum Cultus, 2011
In Poland common viper’s bugloss (E. vulgare L.) is the most common species. E. vulgare belongs to medicinal, ornamental and bee plants, since it is a source of nectar and pollen forage. These flowers are frequently visited by bumblebees and honey bees. 
Mirosława Chwil, Elżbieta Weryszko-Chmielewska   +1 more
doaj  

Is Self-Incompatibility Related to Nectar Presence in Dendrobium?

Plants
Studies on the gain or loss of nectar during the course of evolution in Dendrobium Sw. (Orchidaceae) are able to provide important information concerning the reproductive biology of this enormous orchid genus and highlight reproductive barriers—in ...
Karolina Zielińska, Kamil Kisło, Piotr Dobrzyński, Kevin L. Davies, Małgorzata Stpiczyńska   +4 more
doaj   +1 more source

Nectar secretion dynamics of Ziziphus nummularia: A melliferous species of dry land ecosystems. [PDF]

Saudi J Biol Sci, 2017
Hassan AMA, Giovanetti M, Raweh HSA, Owayss AA, Ansari MJ, Nuru A, Radloff SE, Alqarni AS.   +7 more
europepmc   +1 more source