Female gametophyte development in Eleocharis sellowiana (CYPERACEAE): a species with atypical nuclear staining and polarity of the megaspore mother cell

2014 ◽  
Vol 301 (4) ◽  
pp. 1287-1292 ◽  
Author(s):  
Danilo M. Rocha ◽  
Célia G. T. J. Andrade ◽  
André L. L. Vanzela
Keyword(s):  
Mother Cell ◽  
Megaspore Mother Cell ◽  
Female Gametophyte ◽  
Nuclear Staining ◽  
Gametophyte Development ◽  
Female Gametophyte Development

Megagametogenesis, fertilization, and embryo development in Larixdecidua

1986 ◽  
Vol 16 (6) ◽  
pp. 1301-1309 ◽  
Author(s):  
Grzegorz Kosiński
Keyword(s):  
Cell Wall ◽  
Sexual Reproduction ◽  
Mother Cell ◽  
Megaspore Mother Cell ◽  
Female Gametophyte ◽  
Nuclear Stage ◽  
Empty Seed ◽  
Development Failure ◽  
Major Factors ◽  
Female Gametophyte Development

The phenology of sexual reproduction in Larixdecidua Mill, varies from year to year, and some intra- and inter-clonal differences were also found. Megaspore mother cell meiosis occurred at the time of pollination, during the second half of April, resulting in three or four megaspores. The free nuclear stage and cell wall and archegonia formation were completed in late May and the first half of June. An average of four archegonia was observed in each ovule, but the number ranged from two to six. Fertilization occurred during the first 20 days of June, about 7 weeks after pollination. A four-tiered, 16-celled proembryo formed. Meristematic regions formed in the embryo from the end of June to mid-July. Fully developed embryos were observed in mid-August. Simple polyembryony and delayed cleavage polyembryony were observed. Lack of pollination, disturbances during megasporogenesis and female gametophyte development, failure of fertilization, and embryo degeneration are the major factors resulting in empty seed.

scholarly journals Pollination triggers female gametophyte development in immature Nicotiana tabacum flowers

2015 ◽  
Vol 6 ◽  
Author(s):  
Michael S. Brito ◽  
Lígia T. Bertolino ◽  
Viviane Cossalter ◽  
Andréa C. Quiapim ◽  
Henrique C. DePaoli ◽  
...  
Keyword(s):  
Nicotiana Tabacum ◽  
Female Gametophyte ◽  
Gametophyte Development ◽  
Female Gametophyte Development

scholarly journals Maternal Control of PIN1 Is Required for Female Gametophyte Development in Arabidopsis

PLoS ONE ◽  
2013 ◽  
Vol 8 (6) ◽  
pp. e66148 ◽  
Author(s):  
Luca Ceccato ◽  
Simona Masiero ◽  
Dola Sinha Roy ◽  
Stefano Bencivenga ◽  
Irma Roig-Villanova ◽  
...  
Keyword(s):  
Female Gametophyte ◽  
Maternal Control ◽  
Gametophyte Development ◽  
Female Gametophyte Development

scholarly journals Identification and evaluation of the novel genes for transcript normalization during female gametophyte development in sugarcane

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e12298
Author(s):  
Maokai Yan ◽  
Xingyue Jin ◽  
Yanhui Liu ◽  
Huihuang Chen ◽  
Tao Ye ◽  
...  
Keyword(s):  
Gene Expression ◽  
Sexual Reproduction ◽  
Reference Genes ◽  
Female Gametophyte ◽  
Developmental Stages ◽  
Reproductive Organs ◽  
The Novel ◽  
Biofuel Feedstock ◽  
Gametophyte Development ◽  
Female Gametophyte Development

Background Sugarcane (Saccharum spontaneum L.), the major sugar and biofuel feedstock crop, is cultivated mainly by vegetative propagation worldwide due to the infertility of female reproductive organs resulting in the reduction of quality and output of sugar. Deciphering the gene expression profile during ovule development will improve our understanding of the complications underlying sexual reproduction in sugarcane. Optimal reference genes are essential for elucidating the expression pattern of a given gene by quantitative real-time PCR (qRT-PCR). Method In this study, based on transcriptome data obtained from sugarcane ovule, eighteen candidate reference genes were identified, cloned, and their expression levels were evaluated across five developmental stages ovule (AC, MMC, Meiosis, Mitosis, and Mature). Results Our results indicated that FAB2 and MOR1 were the most stably expressed genes during sugarcane female gametophyte development. Moreover, two genes, cell cycle-related genes REC8 and CDK, were selected, and their feasibility was validated. This study provides important insights into the female gametophyte development of sugarcane and reports novel reference genes for gene expression research on sugarcane sexual reproduction.

Seed production and gametophyte formation in Agave tequilana and Agave americana

Botany ◽  
2008 ◽  
Vol 86 (11) ◽  
pp. 1343-1353 ◽  
Author(s):  
Rocio E. Escobar-Guzmán ◽  
Flor Zamudio Hernández ◽  
Katia Gil Vega ◽  
June Simpson
Keyword(s):  
Seed Production ◽  
Female Gametophyte ◽  
Male Gametophyte ◽  
Raw Material ◽  
Low Fertility ◽  
Agave Tequilana ◽  
Genetic Incompatibility ◽  
Gametophyte Development ◽  
Agave Americana ◽  
Female Gametophyte Development

Agave tequilana Weber var. azul is the raw material used in the production of tequila. This species has a life cycle of approximately 6–8 years; however, owing to the practice of removing the inflorescence to conserve accumulated sugar reserves, the main form of reproduction is asexual. Little attention has, therefore, been paid to the process of flowering and the factors leading to low levels of germination and seedling viability have not been investigated in detail. The objective of this study was to document gametophyte development, seed production, and germination in A. tequilana under different pollination treatments and in an interspecies cross with Agave americana L. Seed production and germination efficiency was low for both A. tequilana and A. americana under the different pollination treatments, although interspecies crosses did produce some viable seeds. Development of the male gametophyte in both species is of the successive type, producing pollen grains with dicolpate morphology. Female gametophyte development is of the Polygonum monosporic type. The results obtained suggest that genetic incompatibility, inbreeding effects, factors affecting pollen development and germination, or errors in female gametophyte development may contribute to the low fertility observed for A. tequilana and A. americana.

Female gametophyte development

2013 ◽  
Vol 56 (6) ◽  
pp. 345-356 ◽  
Author(s):  
Ai Guo ◽  
Cai Xia Zheng
Keyword(s):  
Female Gametophyte ◽  
Gametophyte Development ◽  
Female Gametophyte Development

Ovule and Female Gametophyte Development in Fertile and Sterile Safflower Plants (Carthamus tinctorius L.)

1989 ◽  
Vol 37 (6) ◽  
pp. 519 ◽  
Author(s):  
J Carapetian ◽  
EA Rupert
Keyword(s):  
Cell Differentiation ◽  
Female Gametophyte ◽  
Embryo Sac ◽  
Carthamus Tinctorius ◽  
Gametophyte Development ◽  
Male Gametogenesis ◽  
Delayed Initiation ◽  
Rapid Elongation ◽  
Functional Megaspore ◽  
Female Gametophyte Development

Development of safflower ovules and female gametophytes was compared in fertile and genetically sterile F2 and backcross segregants from the cross between 'US-10' and '57-147' genotypes. Fertile plants formed normal anatropous ovules with eight-nucleate embryo sacs, typical of the angiosperms. One week before anthesis, the eight-nucleate embryo sac is well developed and undergoes rapid elongation and expansion during the 24 h prior to anthesis, accompanied by a doubling in length of the florets. Sterile plants also formed normal ovules, but apparently with a delayed initiation of meiosis which was subsequently arrested at Metaphase I. Embryo sacs did not form in sterile florets except for rare observations of uninucleate embryo sacs which began to degenerate before anthesis. The integumentary tapetum which normally developed upon completion of meiosis in fertile plants, was well developed during Prophase I of megasporogenesis in sterile plants. This observation suggests that cell differentiation and development of this nutritive jacket is basically controlled by the age of the ovules rather than initiated by appearance of the functional megaspore. Failure of both female and male gametogenesis seems to result from interaction of three independently segregating genes.

scholarly journals Epigenetic Regulation of Plant Gametophyte Development

2019 ◽  
Vol 20 (12) ◽  
pp. 3051 ◽  
Author(s):  
Vasily V. Ashapkin ◽  
Lyudmila I. Kutueva ◽  
Nadezhda I. Aleksandrushkina ◽  
Boris F. Vanyushin
Keyword(s):  
Mother Cell ◽  
Female Gametophyte ◽  
Male Gametophyte ◽  
Endosperm Development ◽  
Epigenetic Changes ◽  
Gametophyte Development ◽  
Daughter Cells ◽  
Second Stage ◽  
Somatic Tissues ◽  
Mother Cells

Unlike in animals, the reproductive lineage cells in plants differentiate from within somatic tissues late in development to produce a specific haploid generation of the life cycle—male and female gametophytes. In flowering plants, the male gametophyte develops within the anthers and the female gametophyte—within the ovule. Both gametophytes consist of only a few cells. There are two major stages of gametophyte development—meiotic and post-meiotic. In the first stage, sporocyte mother cells differentiate within the anther (pollen mother cell) and the ovule (megaspore mother cell). These sporocyte mother cells undergo two meiotic divisions to produce four haploid daughter cells—male spores (microspores) and female spores (megaspores). In the second stage, the haploid spore cells undergo few asymmetric haploid mitotic divisions to produce the 3-cell male or 7-cell female gametophyte. Both stages of gametophyte development involve extensive epigenetic reprogramming, including siRNA dependent changes in DNA methylation and chromatin restructuring. This intricate mosaic of epigenetic changes determines, to a great extent, embryo and endosperm development in the future sporophyte generation.

Sign in / Sign up

Export Citation Format

Share Document