Results 61 to 70 of about 28,966 (260)

Pollen Morphology of Crucianella L. (Rubiaceae) Based on Light and Scanning Electron Microscope Data and Implications for Taxonomy

Microscopy Research and Technique, EarlyView.
This study provides the palynological analysis of 12 Crucianella L. taxa using LM and SEM. Variations in pollen size, aperture number, and exine ornamentation were identified as key traits, demonstrating their taxonomic value for distinguishing closely related species and subspecies within the genus. ABSTRACT Crucianella L.
Sevcan Celenk, Zelal Kücük, Gülşah Bağcıvan, Ruziye Daşkın   +3 more
wiley   +1 more source

Pollination, Fertilization, and Embryo Development in Southern China Fresh-eating Jujube

HortScience, 2020
To explore the reasons for seed abortion in southern China fresh-eating jujube, improve its reproductive biology, and provide a theoretical basis for the crossbreeding of jujube, we carried out self-pollination and cross-pollination experiments with ...
Fengxia Shao , Sen Wang , Zhiming Liu , Rongyan Hong , Tianjiao Zhao   +4 more
doaj   +1 more source

Insights into Red Deer Ecology during the Late Epigravettian: New isotopic evidence from Riparo Tagliente (Italian Prealps)

Journal of Quaternary Science, EarlyView.
Abstract The transition from the Last Glacial Maximum to the Late Glacial marked a shift from the cold conditions of Greenland Stadial‐2 (GS‐2) to the warmer phases of Greenland Interstadial‐1 (GI‐1), enabling the reoccupation of Alpine regions by Late Palaeolithic hunter‐gatherers.
Mahym Amanova, Dorothée G. Drucker, Federica Fontana   +2 more
wiley   +1 more source

The pollen tube: a soft shell with a hard core

, 2013
Plant cell expansion is controlled by a fine-tuned balance between intracellular turgor pressure, cell wall loosening and cell wall biosynthesis. To understand these processes, it is important to gain in-depth knowledge of cell wall mechanics.
Draeger, Christian, Eichenberger, Christof, Routier-Kierzkowska, Anne-Lise, Nelson, Bradley J, Routier, Anne-Lise, Ringli, Christoph, Nelson, Bradley J., Grossniklaus, Ueli, Felekis, Dimitris, Boisson-Dernier, Aurélien, Weber, Alain, Smith, Richard Simon, Vogler, Hannes, Smith, Richard S   +13 more
core   +1 more source

Late Quaternary climatic variability in the Eastern Mediterranean recorded in Hermes Cave, Corinth Rift, Greece

Journal of Quaternary Science, EarlyView.
ABSTRACT The Greek peninsula lies at the intersection of major atmospheric circulation systems, making it a key location for reconstructing past climate variability in the Eastern Mediterranean. In this study, we present a new high‐resolution multi‐proxy speleothem record from Hermes Cave, located on the shoulder of the Corinth Rift in southern Greece.
Ch. Pennos, S. Pechlivanidou, S. Modestou, A. Persoiu, S.F.M. Breitenbach, U. Ninnemann, R.L. Gawthorpe, J. Maccali, S‐E. Lauritzen, R.Ø. Skoglund, Th. Thuesen   +10 more
wiley   +1 more source

A calcium-dependent protein kinase, ZmCPK32, specifically expressed in maize pollen to regulate pollen tube growth.

PLoS ONE, 2018
Calcium-dependent protein kinases (CPKs) play an essential role in the regulation of pollen tube growth. Although CPK genes have been identified in maize, and some have been functionally characterized, the molecular function of ZmCPKs associated with ...
Jie Li, Yihao Li, Yanling Deng, Ping Chen, Fen Feng, Wanwan Chen, Xiaojin Zhou, Yingdian Wang   +7 more
doaj   +1 more source

Pollen morphology and their viability of some Indian mangroves

Annals of Tropical Research, 2008
A study on pollen morphology of four common Indian mangroves from Sundarbans mangrove swamps, three species from the family Rhizophoraceae (Bruguiera sexangular Laur., Ceriops tagal Perr.
Suparna Gupta, Arunima Ghosh, Subrata Maity, Sauren Das   +3 more
doaj   +1 more source

The effect of temperature on pollen germination and pollen tube growth of sour cherry cultivars [PDF]

Journal of Agricultural Sciences (Belgrade), 2014
The study was carried out to determine the effect of three different temperatures (5, 15 and 25°C) on in vitro pollen germination and pollen tube growth of five sour cherry cultivars: ‘Heimanns Konservenweichsel’, ‘Kelleriis 14’, ‘Oblačinska ...
Milatović Dragan P., Nikolić Dragan T.
doaj   +1 more source

Heterospecific pollen tolerance_Clarkia 2014 pollen tube data

, 2015
Heterospecific pollen tolerance_Clarkia 2014 pollen tube ...
Monica Geber (765351), Gerardo Arceo-Gomez (3241218), Raguso, Robert A., Robert A. Raguso (447318), Arceo-Gomez, Gerardo, Geber, Monica   +5 more
core   +1 more source

A new, ~4500‐year varve record and high‐resolution tephrochronology from lake Hämälänlampi, eastern Finland, provides age constraints for the Furnas C and the Glen Garry/Askja A‐2000 eruptions

Journal of Quaternary Science, EarlyView.
ABSTRACT The northern European distal cryptotephra framework is constantly developing both in terms of identification of new tephra horizons and improved age constraints for the already well‐established tephra marker horizons. However, many prehistoric tephra layers have only been dated by the radiocarbon method, with its inherent problems.
Maarit Kalliokoski, Veera Erola, Saija Saarni   +2 more
wiley   +1 more source