Results 11 to 20 of about 398,539 (299)

Determination of Atmospheric Pollen Grains by Volumetric Method in Sarıkamış District (Kars-Türkiye) [PDF]

open access: yesBiology
Atmospheric pollen was investigated using the Lanzoni VPSS 2000 (Lanzoni, Bologna- Italy) device for 2 years between 2012 and 2013 in the Sarıkamış district of Kars province, one of the highest regions of Türkiye.
Salih Akpınar, Mustafa Kemal Altunoğlu
doaj   +2 more sources

The origin of pine pollen grains captured from air at Calypsobyen, Svalbard [PDF]

open access: yes, 2023
Spitsbergen is the largest island in the Svalbard Archipelago (Norway) that has been permanently populated. The harsh Arctic climate prevents development of large vascular plants such as trees.
Sadys, M.   +8 more
core   +1 more source

Perspectives on deciphering mechanisms underlying plant heat stress response and thermotolerance [PDF]

open access: yes, 2013
Global warming is a major threat for agriculture and food safety and in many cases the negative effects are already apparent. The current challenge of basic and applied plant science is to decipher the molecular mechanisms of heat stress response (HSR ...
Fragkostefanakis, Sotirios   +1 more
core   +1 more source

Pollen morphology of selected species of the subfamily Bombacoideae (Malvaceae sensu lato)

open access: yesActa Botânica Brasílica, 2014
We analyzed the pollen grains of 11 species within the subfamily Bombacoideae. The pollen grains were acetolyzed, after which they were analyzed and photographed under light microscopy. Unacetolyzed pollen grains were analyzed and photomicrographed under
Vanessa Holanda Righetti de Abreu   +2 more
doaj   +1 more source

Determination of cardinal temperatures for sugar apple ( Annona squamosa L.)

open access: yesCiência e Agrotecnologia, 2016
The sugar apple is highly dependent on the pollination and fruit tree pollen performance is crucial for successful fertilization and fruit set. The objective of this study was to determine the cardinal temperatures for in vitro pollen grains germination ...
Bruno Rafael Alves Rodrigues   +5 more
doaj   +1 more source

Terminal settling velocity and physical properties of pollen grains in still air [PDF]

open access: yes, 2016
Numerical simulation of wind pollination requires knowledge of pollen grain physical parameters such as size, shape factor, bulk density, and terminal settling velocity.
Hirose, Yuuki, Osada, Kazuo
core   +1 more source

Effects of High Nitrogen Supply on the Susceptibility to Coolness at the Young Microspore Stage in Rice (Oryza sativa L.)

open access: yesPlant Production Science, 2000
The combined effects of high nitrogen supply, cool temperature regimes and shading on factors related to fertility in rice plants were investigated. High nitrogen supply during the period from the spikelet differentiation stage to the young microspore ...
Takami Hayashi   +3 more
doaj   +1 more source

Palynological evidence for a warmer boreal climate in the Late Pliocene of the Yukon Territory, Canada [PDF]

open access: yes, 2015
The Late Pliocene (3.6–2.6 Ma) was a period of significant global warmth, considered a potential analogue for future anthropogenic climate change. Newly discovered fine-grained sediments from between the gold-bearing lower and upper White Channel Gravels
Chapman, RJ   +9 more
core   +1 more source

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

open access: yes, 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   +4 more
core   +1 more source

SEM observation of pollen in 17 cherry germplasm resources [PDF]

open access: yesGuoshu xuebao
[Objective] Morphological characteristics of pollen grains of different cherry germplasm resources were observed under a scanning electron microscope. The similarities and differences in pollen among different germplasm resources were analyzed, so as to ...
ZHOU Junman   +11 more
doaj   +1 more source

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