Results 71 to 80 of about 1,056 (195)

Environmental Induction of Polyembryony in Echinoid Echinoderms

, 2015
Polyembryony, or the production of multiple offspring from a single zygote, is a widespread phenomenon in the animal kingdom. Various types of polyembryony have been described in arthropods, bryozoans, chordates, cnidarians, echinoderms, and ...
Allen, Jonathan D., Armstrong, Anne Frances, Ziegler, Shelby L.   +2 more
core  

Radiographic analysis for the evaluation of polyembryony in Swingle citrumelo seeds

, 2018
: The polyembryony rate is a very important factor to consider when choosing a commercial rootstock. Currently, automated systems are used to improve seed quality analyses. X-ray testing is a fast, simple, non-destructive, high-precision test that allows
Silvio Moure Cicero (5527463), Francisco Guilhien Gomes Junior (4661035), Natália Arruda (5527466)   +2 more
core   +1 more source

Association Between Reduced Upstream Riparian Forest Cover and Impaired Development of Embryos From Eastern Hellbenders (Cryptobranchus alleganiensis)

Freshwater Biology, Volume 70, Issue 1, January 2025.
ABSTRACT Populations of the Eastern Hellbender, (a large‐bodied, fully aquatic salamander) inhabiting stream reaches with low catchment‐wide riparian forest cover upstream, have experienced population declines and a shift toward a geriatric population age structure.
Holly A. Funkhouser, Brian F. Case, Jordy Groffen, Austin Holloway, William A. Hopkins   +4 more
wiley   +1 more source

Polyembryony in Cassia [PDF]

Nature, 1956
DURING an investigation into a presumed hybrid swarm among Cassias 1, seeds with twin embryos were found. An examination of the seeds of different species of Cassia that were available has shown the occurrence of polyembryony to be geographically widespread and remarkably common within several species. Table 1 gives the percentage of twins and triplets
openaire   +1 more source

The genetic consequences of population marginality: A case study in maritime pine

Diversity and Distributions, Volume 30, Issue 10, October 2024.
Abstract Aim Marginal tree populations, either those located at the edges of the species' range or in suboptimal environments, are often a valuable genetic resource for biological conservation. However, there is a lack of knowledge about the genetic consequences of population marginality, estimated across entire species' ranges.
Adélaïde Theraroz, Carlos Guadaño‐Peyrot, Juliette Archambeau, Sara Pinosio, Francesca Bagnoli, Andrea Piotti, Camilla Avanzi, Giovanni G. Vendramin, Ricardo Alía, Delphine Grivet, Marjana Westergren, Santiago C. González‐Martínez   +11 more
wiley   +1 more source

Comparative transcriptomics of seed nourishing tissues: uncovering conserved and divergent pathways in seed plants

The Plant Journal, Volume 119, Issue 2, Page 1134-1157, July 2024.
SUMMARY The evolutionary and ecological success of spermatophytes is intrinsically linked to the seed habit, which provides a protective environment for the initial development of the new generation. This environment includes an ephemeral nourishing tissue that supports embryo growth. In gymnosperms this tissue originates from the asexual proliferation
Ana Marcela Florez‐Rueda, Célia M. Miguel, Duarte D. Figueiredo   +2 more
wiley   +1 more source

Apomixis goes a long way: Genetic evidence of persistence and long‐distance seed dispersal in an ancient landscape

Journal of Biogeography, Volume 51, Issue 4, Page 694-709, April 2024.
Abstract Aim Apomixis is a widespread trait in extreme environments worldwide, yet phylogeographical studies for species exhibiting these complex reproductive systems are still limited to temperate zones in the Northern Hemisphere. Through analyses of a combination of adult plants and seedlings, and nuclear and chloroplast DNA, we assessed the ...
Nicola Delnevo, Rachel M. Binks, Stephen van Leeuwen, David J. Coates, Shelley McArthur, Bronwyn M. Macdonald, Margaret Hankinson, Margaret Byrne   +7 more
wiley   +1 more source

Identification of zygotic and nucellar seedlings in polyembryonic mango cultivars Identificação de plântulas zigóticas e nucelares em cultivares de manga poliembriônicas

Pesquisa Agropecuária Brasileira, 2012
The objective of this work was to evaluate the occurrence of polyembryony in the mango cultivars Manila and Ataulfo, and to determine whether seedlings cultured in vitro are zygotic or nucelar.
Elisa del Carmen Martínez Ochoa, María Andrade-Rodríguez, Mario Rocandio Rodríguez, Angel Villegas Monter   +3 more
doaj  

Polyembryony increases embryo and seedling mortality but also enhances seed individual survival in Handroanthus species (Bignoniaceae)

, 2015
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Polyembryony seems to be advantageous to mother plants in detriment of their siblings which face competition since the ...
Sampaio, DS, Mendes-Rodrigues, C, Costa, ME, Ranal, MA, Bittencourt, NS, Oliveira, PE, Caetano, APD   +6 more
core   +2 more sources

Especies locales, mercado y transporte en las investigaciones embriológicas: el estudio de la poliembrionía en armadillos a principios del siglo XX Local species, the market, and transportation in embryological research: the study of polyembryony in armadillos in the early twentieth century

História, Ciências, Saúde: Manguinhos, 2008
Se examina en un caso concreto la afirmación general de la importancia de las redes de comunicación y la movilidad de las cosas para la ciencia. De qué forma esto jugó un papel relevante en las investigaciones sobre la embriología de ciertas especies de ...
Susana V. García
doaj   +1 more source