Results 11 to 20 of about 1,493 (112)

Fruit Traits Reflect Adaptation to Dispersers Along a Tropical Elevational Gradient. [PDF]

Ecol Evol
This study investigates how fruit traits related to frugivore dispersal—specifically diameter, colour and presentation—vary along an elevation gradient in Papua New Guinea. Results showed that fruit diameter decreases with elevation, bird‐attracting colours are more common at higher elevations, and branch‐borne (ramiflorous) fruits increase with ...
Hazell RJ, Kaina GS, Sam K, Souto-Vilarós D, Koagouw W, Novotny V, Peck MR, Stewart AJA.   +7 more
europepmc   +2 more sources

Bract size affects resource availability and fruit set in a hummingbird-pollinated plant with distyly polymorphism. [PDF]

Plant Biol (Stuttg)
In Psychotria poeppigiana, larger bracts honestly signal greater nectar availability but have higher mortality, while smaller bracts produce more fruit, revealing a surprising trade‐off and hints of sexual role specialization in this distylous species. Abstract Plants can use non‐floral signals to advertise the presence of resources to pollinators. The
Trevizan R, Oliveira PE, Brito VLG, Oliveira L, Telles F.   +4 more
europepmc   +2 more sources

Resilience and Brain Changes in Long-Term Ayahuasca Users: Insights From Psychometric and fMRI Pattern Recognition. [PDF]

J Magn Reson Imaging
ABSTRACT Background Ayahuasca is an Amazonian psychedelic brew that contains dimethyltryptamine (DMT) and beta carbolines. Prolonged use has shown changes in cognitive‐behavioral tasks, and in humans, there is evidence of changes in cortical thickness and an increase in neuroplasticity factors that could lead to modifications in functional neural ...
Ramos LR, Fernandes O, Sanchez TA.
europepmc   +2 more sources

Lectotypification and a new synonym in Palicourea (Rubiaceae)

Anales del Jardín Botánico de Madrid, 2016
Here we designate specimen no. 10424 from the Museu Nacional (R) as the lectotype of Palicourea rudgeoides (Müll. Arg.) Standl. [Psychotria rudgeoides Müll. Arg., basion.], and assign a new synonym for Palicourea fulgens (Müll.
Carla Y’ Gubáu Manão, Roberto Lourenço Esteves, Sebastião José da Silva Neto   +2 more
doaj   +1 more source

Rediscovery of Chamisso’s type specimens of Hawaiian Psychotria (Rubiaceae, Psychotrieae) in the herbarium of the Natural History Museum, Vienna [PDF]

PhytoKeys, 2018
Between 1815 and 1818, Count Nikolai Romanzoff funded an expedition of the Russian brig Rurik. Besides their primary goal to discover the Northeast Passage, their aim was to collect scientific specimens, for which the botanist Adelbert von Chamisso and ...
Andreas Berger
doaj   +3 more sources

The complete chloroplast genome of Psychotria asiatica, Linnaeus 1759 (Rubiaceae)

Mitochondrial DNA. Part B. Resources, 2022
Psychotria asiatica is a typical traditional medicinal plant. Herein, we acquired and characterized the complete chloroplast (cp) genome sequence of P.
Xiaoshan Geng, Rong Chen, Bo Li, Yulin Zhu, Qin Liu   +4 more
doaj   +1 more source

Polygamous breeding system identified in the distylous genus Psychotria: P. manillensis in the Ryukyu archipelago, Japan [PDF]

PeerJ, 2021
Distyly is a genetic polymorphism composed of long-and short-styled flowers in a population. The evolutionary breakdown of distyly has been reported in many taxa, and mainly involves a shift toward monomorphism or dioecism.
Kenta Watanabe, Akira Shimizu, Takashi Sugawara   +2 more
doaj   +2 more sources

Comparative leaf anatomy and micromorphology of Psychotria species (Rubiaceae) from the Atlantic Rainforest Anatomia e micromorfologia comparada da folha de espécies de Psychotria (Rubiaceae) da Floresta Atlântica

Acta Botânica Brasílica, 2011
The genus Psychotria comprises approximately 2,000 species that are mostly shrubs distributed in forests of the tropics and subtropics. Within the Rubiaceae, Psychotria is well known for its species that produce bioactive alkaloids and for its taxonomic ...
Tarsila Maria da Silva Moraes, Guilherme Rodrigues Rabelo, Camilla Ribeiro Alexandrino, Sebastião José da Silva Neto, Maura Da Cunha   +4 more
doaj   +1 more source

C30 Évaluation in vivo de l’effet anti-inflammatoire des nanoparticules d'argent obtenues par biosynthèse in situ à partir des feuilles de Psychotria calceata

Journal Africain de Technologie Pharmaceutique et Biopharmacie, 2023
Introduction : Les nanotechnologies sont de nos jours une science qui prend une grande importance en raison de leur simplicité, de leur nature écologique et économique.
Françis Ngolsou, Eya’ane Meva François, Mésodé Nnangé Akweh, Patrick Hervé Bétoté Diboué, Nko’o Julien Moise Henri, Fifen Rodrigue, Tchangou Njiemou Armel Florian, Ndongo Okala Jean Paul, Simo Roosevelt, Rasmané Semdé, Nnanga Nga   +10 more
doaj   +1 more source

13C-NMR Spectral Data of Alkaloids Isolated from Psychotria Species (Rubiaceae)

Molecules, 2017
The genus Psychotria (Rubiaceae) comprises more than 2000 species, mainly found in tropical and subtropical forests. Several studies have been conducted concerning their chemical compositions, showing that this genus is a potential source of alkaloids ...
Almir Ribeiro de Carvalho Junior, Ivo Jose Curcino Vieira, Mario Geraldo de Carvalho, Raimundo Braz-Filho, Mary Anne S. Lima, Rafaela Oliveira Ferreira, Edmilson José Maria, Daniela Barros de Oliveira   +7 more
doaj   +1 more source