Results 71 to 80 of about 5,667,091 (281)
Cytogenetic study and pollen viability of four populations of Trigonella [PDF]
Journal of Cell and Molecular Research, 2011 In the present paper, the cytogenetic study including meiotic chromosome number and behavior along with pollen viability were performed in 4 populations of Trigonella spruneriana Boiss. This is the first cytogenetic report of the taxon.
Masood Ranjbar +2 more
doaj +1 more source
B microchromosomes in the family Curimatidae (Characiformes): mitotic and meiotic behavior
Comparative Cytogenetics, 2011 In the present work, six curimatid species were analyzed: Cyphocharax voga (Hensel, 1870), Cyphocharax spilotus (Vari, 1987), Cyphocharax saladensis (Meinken, 1933), Cyphocharax modestus (Fernández-Yépez, 1948), Steindachnerina biornata (Braga ...
T. R. Sampaio +4 more
semanticscholar +1 more source
Early evolutionary history of the seed
Biological Reviews, EarlyView.ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman +2 more
wiley +1 more source
The power of many: when genetics met yeasts and high‐throughput
Biological Reviews, EarlyView.ABSTRACT In recent years, complex technological capabilities have evolved, driven by the need to solve complex and integrative biological questions through global analyses. New equipment allows the scaling up and automation of processes which previously were carried out on a very limited scale.
Víctor A. Tallada, Víctor Carranco
wiley +1 more source
Acta Agronómica, 2008 Conocer aspectos básicos de la citogenética de las papayas de montaña o papayuelas, especies del género Vasconcellea (Caricaceae) originarias de Ecuador y Colombia, fue el objetivo del trabajo.
Creucí Maria Caetano +4 more
doaj
Cytoskeleton, EarlyView.ABSTRACT Of the three types of cytoskeleton known in animals—actin, microtubules, and intermediate filaments—only actin and microtubules exist in plants. Both play important roles in cellular shaping, organelle movement, organization of the endomembrane system, and cell signaling.
Norman R. Groves +3 more
wiley +1 more source
Cytoskeleton, EarlyView.ABSTRACT Pollen is a male gametophyte of angiosperms. Following meiosis, the microspore undergoes an asymmetric division called pollen mitosis I (PMI), which produces two cells of different sizes: a large vegetative cell and a small generative cell. Polarized nuclear migration and positioning during PMI are important for successful pollen development ...
Yoko Mizuta +5 more
wiley +1 more source
Meiotic behavior in wild and domesticated species of Passiflora
, 2011 O comportamento meiotico de 14 taxons foi analisado. As especies foram agrupadas de acordo com o valor de n (6, 9 e 12) para estudos estatisticos.
M. M. Souza, T. Pereira
semanticscholar +1 more source
Cytoskeleton, EarlyView.ABSTRACT Cooperativity between cytoskeletal proteins is crucial for spatiotemporal coordination in biological processes, like oogenesis. In mammalian and Drosophila oogenesis, proper assembly and function of actin networks require coordination between actin assembly factors Spire and formins, as well as actin‐associated proteins like myosins and Rab ...
Joseph Y. Ong +7 more
wiley +1 more source
Variation of microsporogenesis in sexual, apomictic and recombinant plants of Poa pratensis L
Caryologia, 2022 Apomixis is a rather widespread phenomenon in plants. It is defined as the asexual formation of a seed from the maternal tissues of the ovule, avoiding the processes of meiosis and fertilization.
Egizia Falistocco +5 more
doaj