Results 111 to 120 of about 28,966 (260)
Ovary signals for directional pollen tube growth
, 2001 In angiosperms, the female gametophyte has a secluded life; it is protected by several concentric layers that envelop each other. The embryo sac is surrounded by the nucellus, which in turn is wrapped by the integuments forming the ovule, which is nested
Herrero Romero, María
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Sustainable Development, EarlyView.ABSTRACT European urban climate change research lacks integration across scales, geography, and climate challenges, despite Europe's coordinated policy frameworks. Through a hybrid bibliometric and systematic review of 1528 studies (2010–2025) using Cortext Manager and PRISMA 2020 guidelines, this study maps the conceptual patterns, knowledge gaps, and
Isabela Pichardo‐Velázquez +2 more
wiley +1 more source
The Chemical Record, EarlyView.Biomass‐derived carbon provides a sustainable, porous, and conductive scaffold that stabilizes nanomaterials for bifunctional hydrogen evolution reaction/oxygen evolution reaction catalysis. This review summarizes design strategies (defects, heteroatom doping, heterostructures, single atoms), mechanistic/density functional theory insights, degradation ...
Paricha Jebin +8 more
wiley +1 more source
Leukocyte profiles reveal sex and age differences in immune investment in a polygynous bat
Journal of Animal Ecology, EarlyView.Analysis of over 500 blood cell profiles, including repeat samples over four years, reveals that male bats from a long‐lived species with a polygynous mating system invest more in innate than adaptive immunity. Investment in innate immunity increases with age, as estimated by a DNA methylation clock and mark‐recapture data.
Gerald S. Wilkinson +6 more
wiley +1 more source
Journal of Animal Ecology, EarlyView.In this paper, we show that pronounced differences in pollinator communities exist between grasslands embedded in contrasting agricultural landscape contexts. Opportunistic foraging strategies of most pollinators resulted in large interaction turnover, but these shifts did not translate into major changes in overall network structure, most likely as a ...
Olivia Bernhardsson +17 more
wiley +1 more source
Brood parasitism reduces but does not prevent Bombus terrestris reproductive success
Insect Science, EarlyView.Graphical depiction of the colony splitting process. Throughout figures in this paper, results pertaining to host success are represented in blue, and cuckoo success is represented in red. Abstract Cuckoo bumblebees are obligate brood parasites that must invade a colony of their host bumblebee species in order to reproduce.
Sofia Dartnell, Lynn V. Dicks
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Extra-gynoecial pollen-tube growth in apocarpous angiosperms is phylogenetically widespread and probably adaptive [PDF]
, 2012 Wang, Xiao-Fan +2 more
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Functional analysis of the Arabidopsis thaliana AtEP3 endochitinase
, 2001 Chitinases are enzymes that are capable of catalyzing the hydrolysis of chitin, a homopolymer of N-acetylglucosamine. Chitin is the main constituent of the exoskeleton of insects, of crustacean shells and of the cell wall of many fungi but is absent in ...
Passarinho, P.A.
core
Glycosidases in pear pollen tube development
, 1978 During the in vitro germination of pear pollen, several hydrolases were released into the medium. They were apparently eluted from the pollen grain, since the activity was the same when germination was inhibited. These enzymes, once released, had no role
C. -l. Rosenfield +3 more
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Rapid hormonal rise in honey bees due to heat‐shock is mitigated by a primer pheromone
Insect Science, EarlyView.We show that honey bee foragers increased juvenile hormone (JH) titers significantly after heat‐shocked for 1 h at 40 °C, but this increase is dependent on social conditions. Increase of JH titers only happened when bees were isolated (one worker bee per vial) but not in groups.
Thomas Rachman, Zachary Y. Huang
wiley +1 more source