Results 51 to 60 of about 135,219 (228)

A tribal‐scale phylogenomic perspective on ancestry and major lineages of the allotetraploid Hawaiian silversword alliance (Madieae, Compositae)

American Journal of Botany, EarlyView.
Abstract Premise Disentangling the ancestry of insular plant lineages is important for resolving their evolutionary histories but often complicated by polyploidy, an overrepresented condition in remote island floras. We used a phylogenomic approach to study the origin of subgenomes of the tetraploid Hawaiian silversword alliance and advance ...
Bruce G. Baldwin, Susan Fawcett, Andrew Kostic, Bridget L. Wessa, William A. Freyman   +4 more
wiley   +1 more source

Seasonal variation of apparent male fertility and 2n pollen production in plantain and banana

, 2018
Current efforts to produce improved genotypes of plantain (Musa spp. AAB genomic group) and banana (Musa spp. AAA genomic group) depend on identifying triploid, female-fertile clones and crossing them with male-fertile, diploid wild or cultivated ...
Okoro, J., Ortíz, R., Ulburghs, F.
core   +1 more source

The evaluation of pollen quality, and a further appraisal of the fluorochromatic (FCR) test procedure

, 1984
Methods currently available for evaluating pollen quality in vitro include, (a) tests of germinability; (b) tests of the stainability of the vegetative cell contents; (c) tests for enzyme activity, and (d) the fluorochromatic procedure (FCR), which tests
Shivanna, K. R., Heslop-Harrison, J., Heslop-Harrison, Y.   +2 more
core   +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

ASSESSMENT OF ACEROLA POLLEN CHARACTERISTICS FROM A BARBADOS PLANTING [PDF]

, 2017
The causes of low fruit set at a mixed cultivar planting of acerola (Malpighia punicifolia ) in Barbados were investigated. Pollen viability was assessed by in vitro germination and stainability.
Michelini, S., Murray, D., Chillery, L.E.   +2 more
core   +1 more source

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

Ploidy determination in Musa germplasm using pollen and chloroplast characteristics

, 2019
We attempted to determine ploidy level in the gametophyte and the sporophyte of Musa using pollen and chloroplast characteristics, respectively. In the gametophyte, interploidy differences accounted for 63.8 % of the genetic variance for pollen diameter ...
Crouch, J.H., Vuylsteke, D.R., Tenkouano, A., Crouch, H.K.   +3 more
core   +1 more source

Late Quaternary lake filling and drying in northern Australia's largest freshwater lake

Journal of Quaternary Science, EarlyView.
ABSTRACT Lake Woods, Jurrkulu, is northern Australia's largest freshwater lake filled today in strong Indo–Australian summer monsoons (IASM) to maximum depths of ~5 m. On the western margins of the lake, two large arcuate ridges occur 20 to 40 m above the lake floor and inset within these are other mid‐elevation lake deposits, such as depositional ...
Tim J. Cohen, Zenobia Jacobs, Caitlyn Scobie, Sam Marx, William Reynolds, Matthew S. Forbes, Haidee Cadd, Xue Rui, Laura Mogensen, Alexandru Codilean, Réka H. Fülöp, Klaus M. Wilcken, Fabian Boesl, Alex F. Wall, Nicola Stromsoe   +14 more
wiley   +1 more source

Analysis of Carbohydrates and Glycoconjugates by Matrix‐Assisted Laser Desorption/Ionization Mass Spectrometry: An Update for 2023–2024

Mass Spectrometry Reviews, EarlyView.
ABSTRACT The use of MALDI mass spectrometry for the analysis of carbohydrates and glycoconjugates is a well‐established technique and this comprehensive review is the twelfth update of the original article published in 1999 and brings coverage of the literature to the end of 2024.
David J. Harvey
wiley   +1 more source

Morphological characterization and reproductive aspects in genetic variability studies of forage peanut Caracterização morfológica e aspectos reprodutivos no estudo da variabilidade genética em amendoim forrageiro

Scientia Agricola, 2003
Morphological characterization and the study of reproductive behavior are important procedures to identify desirable traits of progenitors to be included in breeding programs. Morphological descriptors and the reproductive behavior of parental accessions
Marilda Augusta Peres Oliveira, José Francisco Montenegro Valls   +1 more
doaj   +1 more source