Development of the Embryo-Sac of Jeffersonia diphylla

Andrews, F. M.

doi:10.1086/327241

Cited by 4 publications

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“…In many Poaceae (Westermaier, 1890) and in 48 other families (Davis, 1966), the antipodals persist until after fertilization and then proliferate. There typically are three antipodals present at megagametophyte maturity but the number may range from none in Claytonia (Portulaceae) (Cook, 1903a), Trianthema (Bhargava, 1935), Agave (Regen, 1941;Mogensen, 1970), Gossypium (Gore, 1932;Jensen, 1963Jensen, , 1965b, Ornithopus (Leguminosae) (Wojciechowska, 1972), Pseuderanthemum tunicatum (Acanthaceae) (Karlstrom, 1973), and Jubaeopsis (Palmae) (Robertson, 1976), to one in some Rubiaceae (Lloyd, 1899), two in many Compositae (Newcomb, 1973a;Telezyriska and Telezyriski, 1973;Howe, 1975) and four in Potamogeton (Potamogetonaceae) (Wiegand, 1900) and Linum (Vazart, 1969). The number following fertilization ranges up to as many as 100 in Hordeum (Cass and Jensen, 1970), 150 in Sparganium (Sparganiaceae) (Campbell, 1899) and to the reported record of several hundred in Sasa paniculata (Poaceae) (Yamaura, 1933).…”

Section: Introduction and Reviewmentioning

confidence: 99%

“…They become extremely large in Aquilegia canadensis (Mottier, 1895) where they appear to be some 15-fold larger than the four-celled embryo, and in Jeffersonia diphylla (Podophyllaceae) (Andrews, 1895) and C Moris gay ana (Poaceae) (Chikkannaiah and Mahalingappa, 1975), they occupy more than half the megagametophyte's volume. Even larger, the antipodals of Callipeltis and Sherardia (Rubiaceae) (Lloyd, 1899) extend three-fourths the length of the megagametophyte.…”

Section: Introduction and Reviewmentioning

confidence: 99%

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OVULE DEVELOPMENT IN ORNITHOGALUM CAUDATUM (LILIACEAE) WITH A REVIEW OF SELECTED PAPERS ON ANGIOSPERM REPRODUCTION

Tilton¹,

Lersten²

1981

New Phytologist

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SUMMARYOrnithogalum ovules are crassinucellate, and the nucellar epidermis forms a nucellar cap which is secretory. The nucellus accommodates archespore and megaspore mother cell expansion by a concurrent increase in its size. It accommodates functional megaspore and megagametophyte expansion by simultaneously undergoing growth and partial degeneration. Nucellar degeneration is centrifugal and appears to be an autolytic process rather than a result of mechanical pressure from the growing megagametophyte. Megagametophyte development is of the Polygonum type. Mitotic divisions of the functional megaspore and its daughter cells are characterized by a perinuclear distribution of organelles. Some starch is stored in the micropylar end of the nucellus, but the majority is stored in the chalazal end around the hypostase.

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Section: Introduction and Reviewmentioning

confidence: 99%

Section: Introduction and Reviewmentioning

confidence: 99%

OVULE DEVELOPMENT IN ORNITHOGALUM CAUDATUM (LILIACEAE) WITH A REVIEW OF SELECTED PAPERS ON ANGIOSPERM REPRODUCTION

Tilton¹,

Lersten²

1981

New Phytologist

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“…But often, due partly to the manner of cutting the section and partly to the orientation of the outer anticlinal wall, the position and even the number of cells is not so apparent, since one of the two upper cells then lies more or less completely over the other. (1903), who although they do laot mention the case of Ruppia rostellata, note a similar arrangement of the outer two cells as occurring in Butomus (Ward, 1880), Jeffersonia (Andrews, 1895), and Potamogeton (Holferty, 1901). Moreover, that this position of megaspores is not an invariable rule in Ruppia maritima, is shown by such a case as is illustrated by PI.…”

Section: Female Gametophytementioning

confidence: 78%

“…No internode is placed between it and the subtending leaf, so that it is therefore exactly opposite the latter. 1 5. The second leaf of every branch, in all cases a foliage leaf, is developed on the side of the branch adjacent to the subtending leaf, and thereafter ordinary foliage leaves of the branch proceed in regular distichous ordei-(PL 11, fig.…”

Section: B Arrangementmentioning

confidence: 99%

The morphology of Ruppia maritima

Graves¹

1908

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BIBLIOGRAPHY 165 EXPLANATION OF PLATES 170 relates to the subject of this paper, and which I have found most helpful in its preparation. Ascherson (1889), in Engler and Prantl's Natiirliche Pflanzenfamilien, cites the most important references bearing on the Potamogetonaceae up to the date of his contribution. Among these, the papers on Althenia by Prillieux (1864), Cymodocea by Bornet (1864), and Zostera by Gronland (1851) are valuable for their contributions to the morphology of these allied plants. In this respect, also, the works of Irmisch (1851 and 1858) are remarkable for the accuracy with which they describe the external morphological relations of R. rostellata and other Potamogetonaceae. Of later works, which are especially useful in a comparative morphological study of the vegetative organs, are, among others, those of Sauvageau (1891, II), Campbell (1897) and Goebel (1898). As to ecological considerations pertaining to water plants, the work of Schenck (1886) deserves especial mention. In the preparation of the parts on the reproductive organs, embryo, &c., the works cited are tdo numerous to mention here, and the reader is referred to the bibliography (p. 165). If we except a rather doubtful reference of Hofmeister, (1861, ascertain, is that of Roze (1894), who describes chiefly the conditions of fertilization, but also presents a valuable historical review of the whole genus. Others, it is true, such as Miss Scott (1906) and Chrysler (1907), have dealt with special features of the plant, in the course of their comparative morphological investigations. Ruppta rostellata, on the other hand, if we piece together the results of various observers, has been pretty thoroughly worked out. First Irmisch (1851 and 1858) described carefully its external morphological characters ; next, Wille (1883) studied the development of the embryo, and quite recently Murbeck (1902) published an admirable paper on the reproductive organs and embryo.The genus Ruppia is aquatic, characterized by its long, linear, grass-like leaves with basal sheaths, and grows in brackish and salt water (but probably never salt water of normal ocean strength, see p. 124), in creeks and bays along the coast and in the neighborhood of inland salt springs, throughout all parts of the temperate and tropical zones. Except at low tide it is completely submerged until the period of flowering, when it produces its flowers a short distance (1-3 cm.) above the surface of the water. The flowers, always two to each peduncle, are borne one above the other, on

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“…On the other hand, embryological features of Jeffersonia diphylla are inadequately known. However, fragmentary data are available from the studies of Andrews (1895) and Lewis (1904). They studied the development of the embryo sac and embryo of J. diphylla.…”

Section: Comparison With Allied Genera In Berberidaceaementioning

confidence: 99%

Embryology of Jeffersonia dubia Baker et S. Moore (Berberidaceae) and comparison with allied genera

Ghimire¹,

Heo²

2012

Korean Journal of Plant Taxonomy

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Because the embryological features of Jeffersonia dubia are poorly understood, we conducted the first embryological study comparing it to other related genera of Berberidaceae. Important embryological features of J. dubia are as follows: the anther is tetrasporangiate, anther wall formation confirms basic type, glandular tapetum cells are two nucleate, the epidermis persistent, and the endothecium develops fibrous thickenings, anther dehiscence by two valves, meiosis in a microspore mother cell is accompanied by simultaneous cytokinesis, microspore tetrads are usually tetrahedral, pollen grains two cells at the time of anthesis. The ovule is bitegmic, anatropous and crassinucellate, archesporium single celled, development of the embryo sac Polygonum type, a mature embryo sac is ellipsoidal in shape. Endosperm formation is of Nuclear type and embryogeny Onagrad type. Seeds are arillate and seed coat exotestal type. Embryological comparisons showed that Jeffersonia resemble to Epimedium and Vancouveria rather than Berberis and Mahonia in some features, like as number of tapetal cells, cytokinesis in meiosis, and thickness of exotesta. It also resembles to Gymnospermium in mode of anther wall formation, number of tapetal cells, formation of nucellar cap, and nature of antipodal cells. Nevertheless, Jeffersonia and Gymnospermium differ from several other embryological features and molecular data too. Therefore, embryological evidences support that Jeffersonia is closely related with Epimedium and Vancouveria.

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Development of the Embryo-Sac of Jeffersonia diphylla

Cited by 4 publications

References 0 publications

OVULE DEVELOPMENT IN ORNITHOGALUM CAUDATUM (LILIACEAE) WITH A REVIEW OF SELECTED PAPERS ON ANGIOSPERM REPRODUCTION

OVULE DEVELOPMENT IN ORNITHOGALUM CAUDATUM (LILIACEAE) WITH A REVIEW OF SELECTED PAPERS ON ANGIOSPERM REPRODUCTION

The morphology of Ruppia maritima

Embryology of Jeffersonia dubia Baker et S. Moore (Berberidaceae) and comparison with allied genera

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