Occurrence of Giant Antipodals in the Female Gametophytes of Australian Bossiaeeae, Indigofereae and Mirbelieae (Leguminosae)

1990 ◽  
Vol 38 (4) ◽  
pp. 395 ◽  
Author(s):  
BG Cameron ◽  
N Prakash
Keyword(s):  
Female Gametophyte ◽  
The Other ◽  
Taxonomic Significance ◽  
Gametophyte Development ◽  
Australian Species ◽  
Female Gametophyte Development ◽  
Antipodal Cells

A survey of the female gametophyte development in 62 Australian species of subfamily Papilionoideae showed that giant antipodal cells were found in all species of Bossiaea, Goodia and Platylobium of the tribe Bossiaeeae; in all species of Burtonia, Daviesia, Gompholobium, Sphaerolobium and Viminaria of the tribe Mirbelieae; and in Indigofera australis of the tribe Indigofereae. The giant antipodals were deeply staining, usually had large nuclei with prominent nucleoli and persisted well after fertilisation. The giant antipodals appeared to have a nutritive function in the female gametophyte as they develop at the expense of the nucellus. The occurrence of giant antipodals is of taxonomic significance in the tribes Mirbelieae and Bossiaeeae. This evidence supports the separation of the 'Templetonia group' (Templetonia, Hovea, Lamprolobium) from the other genera in the Bossiaeeae (Bossiaea, Goodia and Platylobiurn or the 'Bossiaea group'). The suggestion is also made to reassess the relationships and composition of the tribes Mirbelieae and Bossiaeeae based on the presence of giant antipodal cells. This would result in the tribe Bossiaeeae consisting of the genera Burtonia, Daviesia, Gompholobium, Sphaerolobium and Viminaria and the members of the 'Bossiaea group', Bossiaea, Goodia and Platylobium.

Ovule and megagametophyte development in selected species of Apeibeae and Grewieae (Malvaceae–Grewioideae) from South America and its systematic implications

2016 ◽  
Vol 64 (5) ◽  
pp. 369
Author(s):  
Elsa Lattar ◽  
Beatriz Gloria Galati ◽  
María Silvia Ferrucci
Keyword(s):  
Female Gametophyte ◽  
Mixed Type ◽  
Outer Integument ◽  
The Other ◽  
Filiform Apparatus ◽  
Polygonum Type ◽  
Chalazal Megaspore ◽  
The Family ◽  
Female Gametophyte Development ◽  
Antipodal Cells

This is the first embryological report of the Grewioideae subfamily, which is meant to contribute to the characterisation of the genera Corchorus, Luehea and Triumfetta. Ovule and female gametophyte development in C. argutus, L. divaricata and T. semitriloba was analysed. The ovules of all species are anatropous, bitegmic and of crassinucellate mixed type. The micropyle of the studied species is formed by the outer integument (exostome). The ovule of L. divaricata differs from those of the other two species because the chalazal tissue expands forming a cap, which gives rise to a wing in the seed. All species present one hypostase. The megaspore mother cell gives rise to a linear megaspore triad in C. argutus and L. divaricata, whereas in T. semitriloba, triads and diads can be observed in the same ovule. The chalazal megaspore develops a seven-celled and eight-nucleate female gametophyte corresponding to the Polygonum type. The synergids of L. divaricata have hooks and a conspicuous filiform apparatus. The antipodal cells in C. argutus are persistent, whereas in the other species, they are small and ephemeral. The embryological characters are compared with those of other taxa within the family and the megagametophyte formation in these species is discussed.

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.

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