Results 81 to 90 of about 398,539 (299)

Relationship between pollen morphology and chromosome numbers in Brazilian species of Lippia L. (Verbenaceae)

Anais da Academia Brasileira de Ciências, 2013
The pollen morphology and exine structure of 17 species of Lippia L. were investigated in this work using light and scanning electron microscopy. Among the species studied, 14 showed tricolporate pollen grains, two had tri- and tetracolporate pollen ...
Saulo M. Sousa, Patrícia M.O. Pierre, Giovana A. Torres, Lisete C. Davide, Lyderson F. Viccini   +4 more
doaj   +1 more source

Pollen characterisation of Maltese honey [PDF]

, 2013
In 2004 and 2005, pollen characterisation of 35 samples of honey collected from the islands of Malta and Gozo, was carried out with the aim to identify the botanical origin of honey produced on these islands.
Mifsud, David, Lanfranco, Edward, Gambin, Claudette   +2 more
core   +1 more source

Swelling of porate pollen grains

, 2023
A finite element representation of the elasticity of porate pollen grains and their response to the influx of water (swelling)
Anže Božič, Antonio Šiber
core   +1 more source

Dental enamel hypoplasia and intra‐tooth isotope records as indicators of physiological stress and environmental variability in Early Pleistocene hippopotamids from Melka Kunture (Upper Awash, Ethiopia)

Journal of Quaternary Science, EarlyView.
ABSTRACT Enamel hypoplasia results from temporary disruptions of enamel deposition during tooth development. It is widely used as an indicator of physiological stress in archeological and paleontological contexts; yet, its relationship with environmental conditions during tooth formation remains poorly constrained.
Giuseppe Briatico, Denis Geraads, Rita T. Melis, Margherita Mussi   +3 more
wiley   +1 more source

Proximal aperture in Cephalanthera longifolia (L.) Fritsch (Orchidaceae) pollen: a rare germination site for angiosperms

Botanical Studies
The pollen dispersal unit of the epidendroid species, Cephalanthera longifolia, is a soft pollinium consisting of loosely connected tetrads that are agglutinated by elastoviscin.
Carola Purgina, Friðgeir Grímsson, Silvia Ulrich   +2 more
doaj   +1 more source

Trade off between quantity and size of pollen grains in the heterandrous flowers of Senna pendula (Fabaceae)

Acta Botânica Brasílica, 2018
Heteranthery, the presence of different types of stamens in a flower, may reduce the conflict between pollinators and plants by ensuring the resource for the pollinator without drastically affecting the availability of viable male gametes for ...
Bruna Karen Pinheiro-Costa, José Neiva Mesquita-Neto, Juliana Ordones Rego, Clemens Schlindwein   +3 more
doaj   +1 more source

MicroPoem: experimental investigation of birch pollen emissions [PDF]

, 2010
Diseases due to aeroallergens constantly increased over the last decades and affect more and more people. Adequate protective and pre-emptive measures require both reliable assessment of production and release of various pollen species, and the ...
Michel, Dominik, Gehrig, Regula, Rotach, Mathias   +2 more
core  

Biomonitoring of pollen grains of a river bank suburban city, Konnagar, Calcutta, India, and its link and impact on local people [PDF]

, 2015
Introduction and objectives Pollen grains released by plants are dispersed into the air and can become trapped in human nasal mucosa, causing immediate release of allergens triggering severe Type 1 hypersensitivity reactions in susceptible allergic ...
Naren Pandey, Ghosal, K., Kavita Ghosal, Kavita Ghosal, Pandey, N., Naren Pandey, Bhattacharya, S.G., Swati Gupta Bhattacharya   +7 more
core   +2 more sources

New Schmidt hammer exposure‐age dating calibrations for the Last Glacial Termination in NW Scotland: Development and application to undated Torridon Group sandstone surfaces in Wester Ross

Journal of Quaternary Science, EarlyView.
ABSTRACT An understanding of the terrestrial extent, retreat dynamics and climate–glacier coupling of ice masses during the Last Glacial Termination (LGT, ~18–11 ka) is often limited by a fragmentary geomorphological record and is dependent on precise, accurate and robust dating frameworks.
Alastair M. Curry, David Small, Oliver T. Bartlett, Jonathan Newitt   +3 more
wiley   +1 more source

Morphology and contents of mature pollen grains.

, 2014
Mature pollen grains are suboblate to spheroidal, isopolar, radially symmetrical and 3-porate. A prominant globular protruding oncus projects from each aperture. For most of their development, the pollen grains do not contain starch grains.
Abraham E. van Wyk (154306), Chris F. van der Merwe (154308), Patricia M. Tilney (154304)   +2 more
core   +1 more source