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Meiotic Development of Canine Oocytes from Poly-Ovular and Mono-Ovular Follicles after In Vitro Maturation.
Animals (Basel)
February 2023
Laboratory of Animal Reproduction, Department of Animal Production, Faculty of Veterinary Sciences, University of Chile, Santiago 8820000, Chile.
Poly-ovular follicles are defined as those with more than one oocyte present in single follicles. The occurrence frequency of this follicle type is higher in canines than that in other species. This study aimed to evaluate the in vitro meiotic maturation of dog oocytes from this follicle type in comparison to those from mono-ovular follicles of various sizes (small antral, medium antral, and large antral) considering different phases of the estrus cycle (anestrus, proestrus, estrus, and diestrus).
View Article and Find Full Text PDFAltering the localization and toxicity of arsenic in rice grain.
Sci Rep
March 2022
Department of Plant and Soil Sciences, University of Delaware, Newark, DE, 19716, USA.
Previous work has shown that inorganic As localizes in rice bran whereas DMA localizes in the endosperm, but less is known about co-localization of As and S species and how they are affected by growing conditions. We used high-resolution synchrotron X-ray fluorescence imaging to image As and S species in rice grain from plants grown to maturity in soil (field and pot) and hydroponically (DMA or arsenite dosed) at field-relevant As concentrations. In hydroponics, arsenite was localized in the ovular vascular trace (OVT) and the bran while DMA permeated the endosperm and was absent from the OVT in all grains analyzed, and As species had no affect on S species.
View Article and Find Full Text PDFThe Crazy Ovary.
Genes (Basel)
June 2021
UMR INRAE-CNRS-IFCE-Université de Tours, 37380 Nouzilly, France.
From fetal life until senescence, the ovary is an extremely active tissue undergoing continuous structural and functional changes. These ever-changing events are best summarized by a quotation attributed to Plato when describing motion in space and time-'nothing ever is but is always becoming…'. With respect to the ovary, these changes include, at the beginning, the processes of follicular formation and thereafter those of follicular growth and atresia, steroidogenesis, oocyte maturation, and decisions relating to the number of mature oocytes that are ovulated for fertilization and the role of the corpus luteum.
View Article and Find Full Text PDFSpatio-Temporal Distribution of Cell Wall Components in the Placentas, Ovules and Female Gametophytes of during Pollination.
Int J Mol Sci
May 2021
Chair and Department of Biology and Genetics, Medical University of Lublin, 20-093 Lublin, Poland.
In most angiosperms, the female gametophyte is hidden in the mother tissues and the pollen tube enters the ovule via a micropylar canal. The mother tissues play an essential role in the pollen tube guidance. However, in , the female gametophyte surpasses the entire micropylar canal and extends beyond the limit of the integument.
View Article and Find Full Text PDFFloral anatomy, embryology, seed, and fruit development in Cephalanthus (Naucleeae-Rubiaceae), with emphasis on C. glabratus.
Protoplasma
March 2022
Instituto de Botánica del Nordeste (UNNE-CONICET), Sargento Cabral 2131, C. C. 209, C. P. 3400, Corrientes, Argentina.
Information on the reproductive anatomy in genera of the tribe Naucleeae, particularly Cephalanthus, is scarce and fragmented. Of the six species in the genus, only the mature megagamethophyte of Cephalanthus occidentalis has been described. This study aims to provide information on embryological aspects in flowers of C.
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