Results 21 to 30 of about 21,917,261 (298)

Effects of Alternaria alternata f.sp. lycopersici toxins on pollen [PDF]

, 1988
Effects of the phytotoxic compounds (AAL-toxins) isolated from cell-free culture filtrates of Alternaria alternata f.sp. lycopersici on in vitro pollen development were studied. AAL-toxins inhibited both germination and tube growth of pollen from several
Franken, J., Franken, J.,, Witsenboer, H.M.A.,, Witsenboer, H.M.A., Bino, R.J.,, Hille, J., Dons, J.J.M.,, Hille, J.,, Bino, R.J., Dons, J.J.M.   +9 more
core   +2 more sources

Floral Resource Partitioning between Centris (Heterocentris) analis (Fabricius, 1804) and Centris (Heterocentris) terminata Smith, 1874 (Hymenoptera, Apidae, Centridini), in an Urban Fragment of the Atlantic Forest

Sociobiology, 2017
The knowledge on plant species used for the collection of floral resources is crucial to understanding interactions between plants and bees. The aim of the present study was to identify floral resources used by Centris analis and Centris terminata to ...
Reinanda Lima, Maria Ferreira-Caliman, Marcos da Costa Dórea, Caroline Tito Garcia, Francisco de Assis Ribeiro dos Santos, Favízia Freitas Oliveira, Carlos Alberto Garófalo   +6 more
doaj   +1 more source

Gelechiidae Moths Are Capable of Chemically Dissolving the Pollen of Their Host Plants [PDF]

, 2011
Background: Many insects feed on pollen surface lipids and contents accessible through the germination pores. Pollen walls, however, are not broken down because they consist of sporopollenin and are highly resistant to physical and enzymatic damage. Here
Li, Yongquan, Luo, Shixiao, Zhang, Dianxiang, Chen, Shi, Renner, Susanne S.   +4 more
core   +1 more source

Holocene Environmental and Anthropogenic Changes of Soils and Vegetation in the Central Russian Upland: The Case Study in the “Belogorie” Natural Reserve

Geosciences, 2018
Several episodes of past afforestation were reconstructed in a grassland area of the Yamskaya Steppe site within the “Belgorie„ natural reserve on the Central-Russian Upland.
Yury Chendev, Olga Khokhlova, Elena Ponomarenko, Ekaterina Ershova, Alexander Alexandrovskiy, Tatyana Myakshina   +5 more
doaj   +1 more source

The Integrated Use of Dendrochronological Data and Paleoecological Records From Northwest European Peatlands and Lakes for Understanding Long-Term Ecological and Climatic Changes—A Review

Frontiers in Ecology and Evolution, 2022
Our overall understanding of long-term climate dynamics is largely based on proxy data generated from archives such as ice cores, ocean sediments, tree rings, speleothems, and corals, whereas reconstructions of long-term changes in vegetation and ...
Johannes Edvardsson, Samuli Helama, Mats Rundgren, Anne Birgitte Nielsen   +3 more
doaj   +1 more source

A Continuous Palynological Record of Forest Clearing at Rano Kao (Easter Island, SE Pacific) During the Last Millennium: Preliminary Report

Quaternary, 2019
Easter Island (Rapa Nui) deforestation has traditionally been viewed as a single event, synchronous in time and space across the island and caused by Polynesian settlers.
Irantzu Seco, Valentí Rull, Encarni Montoya, Núria Cañellas-Boltà, Santiago Giralt, Olga Margalef, Sergi Pla-Rabes, William J. D’Andrea, Raymond S. Bradley, Alberto Sáez   +9 more
doaj   +1 more source

A note on a thermokarst feature on the North Slope of Alaska [PDF]

Bulletin of the Geological Society of Finland, 1994
A thermokarst depression with active thermal erosion on one margin and a drainage way to the Sagavanirktok River is described with the aid of a sketch plan and sections.
R.G. West, J.J. Donner, T. Kankainen
doaj   +1 more source

Pollen spectrum of propolis samples from São Paulo State, Brazil - doi: 10.4025/actascianimsci.v35i3.18389

Acta Scientiarum: Animal Sciences, 2013
The pollen spectrum of propolis is a good indicative of the phytogeographical origin of the bee product and the local flora available for bee visiting. The present study aimed to perform pollen analysis of propolis produced by Apis mellifera L., in the ...
Cinthia Rio Branco da Silva, Thaila Cristina Putarov, Ricardo Oliveira Orsi   +2 more
doaj   +1 more source

Macrofossils and pollen representing forests of the pre-Taupo volcanic eruption (c. 1850 yr BP) era at Pureora and Benneydale, central North Island, New Zealand. [PDF]

, 1995
Micro- and macrofossil data from the remains of forests overwhelmed and buried at Pureora and Benneydale during the Taupo eruption (c. 1850 conventional radiocarbon yr BP) were compared. Classification of relative abundance data separated the techniques,
Lowe, David J., Matthew S. McGlone, McGlone, Matt S., Beverley R. Clarkson, Clarkson, Beverley R., David J. Lowe, Clarkson, Bruce D., Bruce D. Clarkson   +7 more
core   +1 more source

Holocene Flora, Vegetation and Land-Use Changes on Dingle Peninsula, Ireland, as Reflected in Pollen Analytical, Archaeological and Historical Records

Diversity
Palaeoecological investigations connected with extensive pre-bog, stone walls, and field systems at Kilmore, Dingle peninsula, Ireland, are presented. The main pollen profile, KLM I, spans the last 4000 years.
Michael O’Connell, Steffen Wolters
doaj   +1 more source