Functional Anatomy of the Ovule in Broad Bean (Vicia faba L.). I. Histogenesis Prior to and after Pollination

Johansson, Monica; Walles, Björn

doi:10.1086/297093

Cited by 18 publications

(12 citation statements)

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“…4C). Afterward, at the cotyledon stage (i.e., after the degeneration of the suspensors), these embryos have been reported to adhere to the endosperm at a spot called the “contact zone” near the mouth of the radicle pocket in two Fabeae species, Pisum sativum (Marinos, 1970) and Vicia faba (Johansson and Walles, 1993), and was observed in another six Fabeae species in the present study (Fig. 4D, E; Table 1).…”

Section: Discussionsupporting

confidence: 71%

“…4D, E; Table 1). At the contact zone, nutrients are thought to move from the seed coat to the embryo (Marinos, 1970; Johansson and Walles, 1993). Collectively, these observations suggest that the two main functions of suspensors are resumed by other parts/tissues of the embryo proper and carried out by different means.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, although the suspensors in some leguminous species (e.g., four Astragalus L. species, and Vicia faba L.) degenerate after initiation of the cotyledons as in most flowering plants (Johansson and Walles, 1993; Wredle et al, 2001; Riahi et al, 2003; Riahi and Zarre, 2009), in others (e.g., eight Crotalaria L. species and two Adesmia DC. species), the suspensor persists until later in seed development (Rau, 1950; Rodriguez‐Pontes, 2008).…”

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confidence: 99%

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Characterization and systematic implications of the diversity in timing of programmed cell death of the suspensors in Leguminosae

Endo

2012

American J of Botany

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Section: Discussionsupporting

confidence: 71%

Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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Characterization and systematic implications of the diversity in timing of programmed cell death of the suspensors in Leguminosae

Endo

2012

American J of Botany

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“…The characters of these organs can be used in separating and defining taxa position. Although pollen morphology was used as the most important microscopic character in the taxonomy of Onobrychoidei (Pinar et al 2009) but there are also some reports about taxonomically important of ovule characters in the Fabaceae family such as variability in the megaspore tetrads, ovule type, number of archesporial cells, number of parietal layers and the alignment pattern of the integuments (Rembert Junior 1966, 1969a, b, 1971Davis 1966;Prakash 1987;Yeung & Cavey 1990;Johri et al 1992;Dute & Peterson 1992;Chamberlin et al 1994;Johansson & Walles 1993;Riahi et al 2003;Chehregani & Tanaomi 2010), but Onobrychis is still embryologically unknown.…”

Section: Introductionmentioning

confidence: 99%

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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“…They were positioned at the chalazal end of the gametophyte, and had a triangular shape ( Figure 4); their nuclei were small, as compared to other nuclei in the gametophyte. The antipodals were ephemeral, as in many other species, such as Vicia faba (Johansson and Wales, 1993). Sometimes the antipodals were absent, as reported for species from the sub-family Papilionoideae (Cameron and Prakash, 1994), and sometimes they were found after fertilization (Frederickson, 1990).…”

Section: Resultsmentioning

confidence: 76%

Embryo sac development in yellow passion fruit Passiflora edulis f. flavicarpa (Passifloraceae)

et al. 2002

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The yellow passion fruit, Passiflora edulis f. flavicarpa, is one of the most important Brazilian fruit crops. It is an allogamous, diploid, and self-incompatible species. It has hermaphrodite, solitary flowers, located in the leaf axils and protected by leaf bracts. The flower has an androgynophore, which is a straight stalk supporting its reproductive parts. There are usually five anthers, located at the tip of each of the five filaments. The ovary is borne just above the filaments, at the top of the androgynophore; there are three styles that are united at their base, and at the top there are three stigmas. The objective of this research was to observe embryo sac development in yellow passion flowers. Ovaries at different stages of development were fixed in FAA (formalin, acetic acid and alcohol solution), hydrated, stained with Mayer's hemalum, and dehydrated. Ovules were cleared by using methyl salicylate, mounted on slides, and observed through a confocal scanning laser microscope. The yellow passion fruit ovule is bitegmic, crassinucellate, and anatropous, and its gametophyte development is of the Polygonum type. After meiosis, functional megaspores under go three successive mitotic divisions, resulting in an eight-nucleate megagametophyte: the egg apparatus at the micropylar end, two polar nuclei at the cell center, and three antipodals at the chalazal end. The egg apparatus is formed by an egg cell and two synergids, each with a filiform apparatus. The mature embryo sac has an egg cell, two synergids, two polar nuclei, and three antipodes, as has been described for most angiosperms.

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Functional Anatomy of the Ovule in Broad Bean (Vicia faba L.). I. Histogenesis Prior to and after Pollination

Cited by 18 publications

References 0 publications

Characterization and systematic implications of the diversity in timing of programmed cell death of the suspensors in Leguminosae

Characterization and systematic implications of the diversity in timing of programmed cell death of the suspensors in Leguminosae

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

Embryo sac development in yellow passion fruit Passiflora edulis f. flavicarpa (Passifloraceae)

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