Results 21 to 30 of about 127,000 (225)

Pollen characterisation of Maltese honey [PDF]

open access: yes, 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   +2 more
core   +1 more source

Hybridization in Four Nigerian Physalis (Linn.) Species

open access: yesNotulae Scientia Biologicae, 2018
Interspecific reciprocal crosses among four Nigerian Physalis species (Physalis angulata, P. micrantha, P. pubescens and P. peruviana) were carried out by transferring desired pollen grains to ovalate parents, bagged and labelled to prevent contamination
Sekinat Okikiola AZEEZ   +1 more
doaj   +1 more source

Biogeography of the Genus Linaria (Plantaginaceae) Based on Chromosome Number Data [PDF]

open access: yesJournal of Cell and Molecular Research, 2015
The biogeography of genus Linaria was revealed by the available chromosome counts from all over the world. Chromosome numbers of 92 taxa of the genus Linaria are included in an on-line karyological database.
Massoud Ranjbar, Samineh Nouri
doaj   +1 more source

Observations and modelling of birch pollen emission and dispersion from an isolated source [PDF]

open access: yes, 2014
The occurrence of allergic diseases in western countries increased during the last decades due to greater awareness towards a hygienic lifestyle. The hygiene hypothesis relates the reduced expo- sure to microbial pollution to an underdevelopment of the
Michel, Dominik
core   +1 more source

Variable Penetrance among Different Sources of the Male Fertility Restoration Allele of Onion

open access: yesHortScience, 2020
Hybrid onion (Allium cepa) seed is produced using cytoplasmic male sterility (CMS). For the most commonly used source of onion CMS, male fertile plants possess male sterile (S) cytoplasm and dominant allele(s) at one nuclear male fertility locus (Ms ...
Hsiang-I Lee, Michael J. Havey
doaj   +1 more source

Inference of Ploidy Level in 19th-Century Historical Herbarium Specimens Reveals the Identity of Five Acorus Species Described by Schott

open access: yesDiversity, 2023
Heinrich Wilhelm Schott (1794–1865) was one of the pioneering researchers in the taxonomy of the species-rich monocot family Araceae. He described numerous new plant species in various genera, including Acorus, which is currently segregated as a ...
Dmitry D. Sokoloff   +3 more
doaj   +1 more source

Structure and Function of a Multi‐Megadalton Virus‐Like Proteolytic Dodecahedron

open access: yesAngewandte Chemie, EarlyView.
Zuzalysin, a virulence metallopeptidase of the periodontal pathogen Porphyromonas gingivalis, is secreted as a latent, flexible ≈95‐kDa monomer. Calcium triggers cysteine‐switch activation and hierarchical assembly into pentamers, bipentamers, tripentamers, and a ≈5.6‐MDa, ≈355‐Å dodecahedron. Structures at 1.8–3.6 Å reveal a virus‐sized catalytic cage
Mariusz Madej   +20 more
wiley   +2 more sources

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

open access: yes, 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.   +9 more
core   +2 more sources

Comparative pollination role of stamens and breeding system in three species of Commelina (Commelinaceae) in Ile-Ife, Nigeria

open access: yesActa Botânica Brasílica, 2013
This study investigated pollination mechanisms and breeding systems in five Commelina variants: two subspecies of Commelina diffusa (C. diffusa subsp. aquatica and C. diffusa subsp. montana, each having two staminodes); two variants of C.
Matthew Oziegbe   +2 more
doaj   +1 more source

Begonia heracleifolia F1 pollen stainability in experimental crosses

open access: yes, 2013
Pollen stainability of experimental Begonia heracleifolia interpopulation crosses.
Richard Ennos (3261009)   +5 more
core   +1 more source

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