Ovule ontogenesis and megasporogenesis in Adesmia latifolia (Spreng.) Vog. (Leguminosae-Papilionoideae)

Moço, Maria Cecília Chiara; Mariath, Jorge Ernesto de Araújo

doi:10.1590/s0100-84042003000400008

Cited by 10 publications

(16 citation statements)

References 34 publications

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“…The nucellus of ovules in Fabaceae is crassinucellate (Prakash 1987;Faigón Soverna et al 2003;Moco & Mariath 2003;Galati et al 2006), which were also found in our species. This type has been considered to be the plesiomorphic condition in angiosperms (Sporne 1969).…”

Section: Discussionsupporting

confidence: 80%

Comparative study of gametophyte development in the some species of the genus Onobrychis: Systematic significance of gametophyte futures

2011

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Male and female gametophytes have special characters that show a great variety in different taxa. In this study, gametophytes of four species belonging to three sections of the genus Onobrychis Mill. were studied with light microscopy. Results showed that the ovular primordium is tetra-zonate and gives rise to an anatropous ovule. The archesporium may consist of one or more archeosporial cells, but only one of them undergoes meiosis, forming a linear or T-shaped tetrad. Normally, only a single megaspore is functional which is located in the chalazal position while the others degenerate very soon. The young ovule is hemi-anatropous but the mature is anatropous, crassinucellar and bitegmic; integuments form a zig-zag micropyle. A 7-celled embryo-sac is formed corresponding to the Polygonum type. Based on our results, the ovular variable characters are the form and condition of ovary, presence or absence of ovary peduncle, the number and condition of ovule in ovary, length and width of ovule, length and width of embryo sac, number of layers in outer integument, condition of megaspore, alignment pattern of the integuments, asymmetrical initiation of the outer integument, shape of tetrad with the presence of one functional megaspore and so on. The separator characters in male gametophyte are including tri-cellular pollen grains and the number of tapetum nuclei. According to our study the female gametophyte characters are more variable than male gametophyte. The present study provides the first report on embryological description in the genus Onobrychis and also in section Heliobrychis.

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Section: Discussionsupporting

confidence: 80%

Comparative study of gametophyte development in the some species of the genus Onobrychis: Systematic significance of gametophyte futures

2011

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“…The absence of a micropylar nucellar beak is clearly shown in Figs 3, 6 and 11. Furthermore, in A. latifolia , the micropylar nucellus is almost completely reabsorbed at the mature embryo sac stage, and no nucellar beak is present (Moço, 2002; Moço & Mariath, 2004), as observed in the present work in both Adesmia species. Diverse micropylar haustoria are found in angiosperms.…”

Section: Resultssupporting

confidence: 85%

“…Vog. (Moço & Mariath, 2001, 2003, 2004; Moço, 2002) have been investigated. However, seed development has only been analysed in detail in Adesmia securigerifolia Herter (Izaguirre, Mérola & Beyhaut, 1994).…”

Section: Introductionmentioning

confidence: 99%

Seed formation in two species ofAdesmia(Fabaceae): co-occurrence of micropylar and lateral endosperm haustoria in legumes and its taxonomic value

Rodríguez-Pontes

2008

Botanical Journal of the Linnean Society

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Seed ontogeny of Adesmia bicolor and Adesmia latifolia was analysed using light microscopy and standard histological techniques. Fertilization was porogamic. Linear proembryonal tetrads were observed in A. bicolor. The robust elongated suspensors possessed specialized basal cells. The nucellar epidermis became endothelial. The free-nuclear endosperm produced a micropylar, filamentous and ephemeral haustorium and a lateral sac-like haustorium at the funicular side. The cellular endosperm was initiated from the micropylar zone after the cordiform embryo stage. It mostly disintegrated in mature seeds. The sclerified bilayered testa was derived from the outer ovular integument. Different astrosclereid arrangements beyond the lens in both Adesmia species may be related to the different habitats of the two species. The occurrence of both micropylar and lateral nuclear endosperm haustoria has so far not been reported in Fabaceae and is the most distinctive embryological character of Adesmieae. The taxonomic value of the mostly uniform morphology of the suspensor in the Adesmia species studied could also be relevant. The nature of seed endothelia in many Fabaceae requires accurate redetermination prior to taxonomic use.

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“…Embryological features can provide >50 characters associated with the development of anthers, ovules and seeds, contributing to a better understanding of the relationships among families and genera (Tobe, ). Studies such as the observations of ovule development have proved to be efficient in differentiating taxonomic groups, not only by confirming phylogenetic relationships but also by revealing evolutionary patterns within the groups (Tobe & Raven, ; Anton & Cocucci, ; Juncosa & Tobe, ; Tobe, ; Moço & Mariath, ; De Toni & Mariath, , ; Fagundes & Mariath, ).…”

Section: Introductionmentioning

confidence: 99%

Ovary and ovule anatomy in the nidularioid complex and its taxonomic utility (Bromelioideae: Bromeliaceae)

et al. 2014

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In Bromelioideae, the so-called nidularioid complex contains closely related genera, the circumscription of which has been problematic. The goal of this study was to describe the ovary and ovule anatomy of six species of the nidularioid complex belonging to Canistropsis, Canistrum, Edmundoa, Neoregelia, Nidularium and Wittrockia and to use these characters in a parsimony analysis of relationships. In all analysed species, schizogenous-type aerenchyma is present in the ovarian mesophyll. Edmundoa lindenii has trichomes on the ovary surface, and this character appears to be an autapomorphy for the species. Canistrum aurantiacum exhibited some autapomorphies, such as four cell layers in the outer integument, non-elongated cells in the nucellar epidermis and three or four layers of cells in the parietal tissue. In the remaining species of the complex, the presence of transversally orientated ovules and anticlinally elongated cells in the outer integument in the micropylar region appear to be synapomorphies. Canistrum aurantiacum shares few characters with the other species; these results and the latest phylogenetic analysis show that Canistrum spp. do not belong to the current nidularioid clade.

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Ovule ontogenesis and megasporogenesis in Adesmia latifolia (Spreng.) Vog. (Leguminosae-Papilionoideae)

Cited by 10 publications

References 34 publications

Comparative study of gametophyte development in the some species of the genus Onobrychis: Systematic significance of gametophyte futures

Comparative study of gametophyte development in the some species of the genus Onobrychis: Systematic significance of gametophyte futures

Seed formation in two species ofAdesmia(Fabaceae): co-occurrence of micropylar and lateral endosperm haustoria in legumes and its taxonomic value

Ovary and ovule anatomy in the nidularioid complex and its taxonomic utility (Bromelioideae: Bromeliaceae)

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