Results 51 to 60 of about 1,435 (186)

Leaf Phenolics of Gunnera Manicata (Gunneraceae) [PDF]

open access: yes, 1988
Foliar material of Gunnera manicata (Gunneraceae) was examined for the presence of phenolics using standard extraction and identification techniques. Two lIavonoids, quercetin 3-0-ga1actoside and quercetin 3-0-g1ucoside and an unidentified ellagitannin ...
Doyle, Michael F., Scogin, Ron
core   +3 more sources

Phylogeography of a Tertiary relict plant, Meconopsis cambrica (Papaveraceae), implies the existence of northern refugia for a temperate herb [PDF]

open access: yes, 2011
The perennial herb Meconopsis cambrica, a western European endemic, is the only European species of the otherwise Himalayan genus Meconopsis and has been interpreted as a Tertiary relict species.
Kadereit, Joachim W.   +2 more
core   +3 more sources

Life History Traits of Talicada nyseus (Lepidoptera: Lycaenidae) Butterfly Under Laboratory Conditions [PDF]

open access: yes, 2013
The butterfly Talicada nyseus G. (Lepidoptera: Lycaenidae) is abundant in India and Sri Lanka (Karunaratne, et al., 2002). In India, this butterfly is chiefly found in the peninsular area, Maharashtra, Karnataka, Punjab and foothills of the Himalayas ...
Akhila, C.M.   +8 more
core   +1 more source

Explosive Radiation of Malpighiales Supports a Mid-Cretaceous Origin of Modern Tropical Rain Forests [PDF]

open access: yes, 2005
Fossil data have been interpreted as indicating that Late Cretaceous tropical forests were open and dry adapted and that modern closed-canopy rain forest did not originate until after the Cretaceous-Tertiary (K/T) boundary.
Davis, Charles   +4 more
core   +1 more source

Steric Constraints as a Global Regulation of Growing Leaf Shape [PDF]

open access: yes, 2009
Shape is one of the important characteristics for the structures observed in living organisms. Whereas biologists have proposed models where the shape is controlled on a molecular level [1], physicists, following Turing [2] and d'Arcy Thomson [3], have ...
Couturier, Etienne   +2 more
core   +5 more sources

Analysis of six chloroplast genomes provides insight into the evolution of Chrysosplenium (Saxifragaceae)

open access: yesBMC Genomics, 2020
Background Chrysosplenium L. (Saxifragaceae) is a genus of plants widely distributed in Northern Hemisphere and usually found in moist, shaded valleys and mountain slopes.
Zhihua Wu   +6 more
doaj   +1 more source

INDEPENDENT ORIGINATION OF FLORAL ZYGOMORPHY, A PREDICTED ADAPTIVE RESPONSE TO POLLINATORS: DEVELOPMENTAL AND GENETIC MECHANISMS [PDF]

open access: yes, 2016
Observations of floral development indicate that floral organ initiation in pentapetalous flowers more commonly results in a medially positioned abaxial petal (MAB) than in a medially positioned adaxial petal (MAD), where the medial plane is defined by ...
Bukhari, Ghadeer, Zhang, Wenheng
core   +1 more source

Placing Nothophylica piloburmensis from Cretaceous amber into the angiosperm phylogeny

open access: yesTAXON, Volume 74, Issue 4, Page 933-937, August 2025.
Abstract Recently, we redescribed an amber inclusion from mid‐Cretaceous Kachin amber of Myanmar, previously assigned to the extant genus Phylica in Rhamnaceae (core eudicots), and placed it in a new fossil‐genus, Nothophylica. Based on our reconstructions, we identified new floral features and instead suggested affinities within magnoliids, especially
Simon Beurel   +4 more
wiley   +1 more source

Peptide Nucleic Acid Based Molecular Authentication for Identification of Four Medicinal Paeonia Species Using Melting Array Analysis of the Internal Transcribed Spacer 2 Region

open access: yesMolecules, 2017
Accurate taxonomic identification of plant materials in herbal medicines is important for product quality control. The genus Paeonia (Saxifragales) is the source of the herbal preparations Paeoniae Radix (Paeoniae Radix Alba and Paeoniae Radix Rubra) and
Wook Jin Kim   +3 more
doaj   +1 more source

Comparative Genomics Insights Into the Evolutionary Disparities Between Nitroplast‐Evolved Ecotype UCYN‐A2 and Its Closest Relative UCYN‐A1

open access: yesEcology and Evolution, Volume 15, Issue 7, July 2025.
This paper conducted comparative genomic analyses among seven UCYN‐A strains in genome content, gene structure, and key metabolic protein genes. In general, our results demonstrated considerable disparities between UCYN‐A1 and UCYN‐A2, providing insights into the evolution of UCYN‐A and nitroplast.
Shiyun Han   +9 more
wiley   +1 more source

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