Results 61 to 70 of about 761 (161)

Ploidy-dependent effect of prolonged photoperiod on mode of reproduction and photosynthesis in the Ranunculus auricomus complex (Ranunculaceae) [PDF]

, 2021
Polyploidy, whole-genome duplication, enhances stress-tolerance to drastic environmental compared to their diploid progenitor by enabling more extensive adaptation as advantages of gene and genome duplication.
Ulum, Fuad Bahrul
core   +1 more source

A new monotypic family for the enigmatic crustose red alga Plagiospora gracilis. [PDF]

, 2016
Plagiospora gracilis, a mucilaginous crustose red alga growing on subtidal pebbles on both coasts of the North Atlantic Ocean, forms distinctive tetrasporangia (red algal meiotic structures that release haploid tetraspores) but gametophytes have never ...
Batters, Batters, Butterfield, Chiovitti, Christine A. Maggs, Collins, Denizot, Dufour, Edelstein, Gary W. Saunders, Guiry, Guiry, Guiry, Hauck, Hawkes, Irvine, Kearse, Kregting, Kuckuck, Kylin, Kylin, Kylin, Kylin, Lee, Maggs, Maggs, Maggs, Maggs, Norris, Parke, Rosenvinge, Saunders, Saunders, Saunders, Saunders, Saunders, Saunders, Schneider, Searles, Sears, South, Taylor, Thiers, Verbruggen, Wittmann, Womersley, Womersley, Wynne, Yang, Yoon, Yoon   +50 more
core   +1 more source

Determination of the Developmental Origin of Seeds Containing Endosperm Using Flow Cytometric Analysis

Bio-Protocol, 2015
Seeds derived from a diploid, sexual plant typically contain a 2n embryo (n+n) and 3n endosperm, a ratio characteristic for most flowering plants. However, this ratio is altered in apomictic species, which reproduce asexually through seeds (Koltunow and ...
Christian Sailer, Anja Schmidt, Ueli Grossniklaus   +2 more
doaj   +1 more source

Selection of reference genes for quantitative real-time PCR expression studies of microdissected reproductive tissues in apomictic and sexual Boechera [PDF]

, 2011
Background Apomixis, a natural form of asexual seed production in plants, is considered to have great biotechnological potential for agriculture. It has been hypothesised that de-regulation of the sexual developmental pathway could trigger apomictic ...
Marco Pellino, Timothy F Sharbel, Martin Mau, Samuel Amiteye, José Corral   +4 more
core   +3 more sources

Global transcriptome analysis of two ameiotic1 alleles in maize anthers: defining steps in meiotic entry and progression through prophase I [PDF]

, 2011
Background Developmental cues to start meiosis occur late in plants. Ameiotic1 (Am1) encodes a plant-specific nuclear protein (AM1) required for meiotic entry and progression through early prophase I. Pollen mother cells (PMCs) remain mitotic in most am1
Guo-Ling Nan, Arnaud Ronceret, Rachel C Wang, John F Fernandes, W Zacheus Cande, Virginia Walbot   +5 more
core   +1 more source

Engineering meiotic recombination pathways in rice

Plant Biotechnology Journal, Volume 17, Issue 11, Page 2062-2077, November 2019., 2019
Summary In the last 15 years, outstanding progress has been made in understanding the function of meiotic genes in the model dicot and monocot plants Arabidopsis and rice (Oryza sativa L.), respectively. This knowledge allowed to modulate meiotic recombination in Arabidopsis and, more recently, in rice. For instance, the overall frequency of crossovers
Ian Fayos, Delphine Mieulet, Julie Petit, Anne Cécile Meunier, Christophe Périn, Alain Nicolas, Emmanuel Guiderdoni   +6 more
wiley   +1 more source

The classification of asexual organisms: Old myths, new facts, and a novel pluralistic approach

TAXON, Volume 67, Issue 6, Page 1066-1081, December 2018., 2018
Abstract Organisms reproducing via asexuality harbor a great diversity of lineages, morphotypes and ecotypes. However, classification of asexual taxa does not fit into contemporary species concepts, and hence the diversity of apomictic plant complexes is not well reflected in taxonomy.
Elvira Hörandl
wiley   +1 more source

Pathways to polyploidy : indications of a female triploid bridge in the alpine species Ranunculus kuepferi (Ranunculaceae) [PDF]

, 2017
Polyploidy is one of the most important evolutionary processes in plants. In natural populations, polyploids usually emerge from unreduced gametes which either fuse with reduced ones, resulting in triploid offspring (triploid bridge), or with other ...
De Storme, Nico, Dullinger, Stefan, Geelen, Danny, Hörandl, Elvira, Kirchheimer, Bernhard, Schinkel, Christoph CF   +5 more
core   +2 more sources

Sexual intraspecific recombination but not de novo origin governs the genesis of new apomictic genotypes in Potentilla puberula (Rosaceae)

TAXON, Volume 67, Issue 6, Page 1108-1131, December 2018., 2018
Abstract Apomixis – asexual reproduction via seeds – might arise de novo following polyploidisation events, or via reproductive transfer of apomixis. Both processes can be obtained within species or via hybridisation. We aimed to determine the origin of apomictic genotypes in Potentilla puberula, a rosaceous species showing reproductive differentiation
Flavia Domizia Nardi, Christoph Dobeš, Dorothee Müller, Tobias Grasegger, Tuuli Myllynen, Henar Alonso-Marcos, Andreas Tribsch   +6 more
wiley   +1 more source

Asymmetric reproductive interference: The consequences of cross‐pollination on reproductive success in sexual–apomictic populations of Potentilla puberula (Rosaceae)

Ecology and Evolution, Volume 8, Issue 1, Page 365-381, January 2018., 2018
We tested for reproductive compatibility of naturally co‐occurring tetraploid sexuals and penta‐ to octoploid apomicts in the rosaceous species Potentilla puberula performing controlled crosses. We estimated the role of selfing as crossing barrier and effects of cross‐ and self‐pollen quality as well as maternal:paternal genomic ratios in the endosperm
Christoph Dobeš, Susanne Scheffknecht, Yulia Fenko, Dagmar Prohaska, Christina Sykora, Karl Hülber   +5 more
wiley   +1 more source