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Megagametophyte development and female sterility in Maytenus obtusifolia Mart. (Celastraceae)
(Springer, 2019-11-01)
Reproduction in flowering plants is closely related to the megagametophyte, since the megagametophyte is involved in pollen tube reception and contains the two female gametes-egg cell and central cell. Previous conventional ...
Activation of nucleases, pcd, and mobilization of reserves in the araucaria angustifolia megagametophyte during germination
(Frontiers Media S.A., 2018-08)
The megagametophyte of mature seeds of Araucaria angustifolia consists of cells with thin walls, one or more nuclei, a central vacuole storing proteins, and a cytoplasm rich in amyloplasts, mitochondria and lipid bodies. ...
Peroxidases in the cell walls of seeds and seedlings of Araucaria araucana
(1992)
Two major proteins present in the cell walls of the embryo and megagametophyte tissues of Araucaria araucana seeds were partially purified, characterized and identified as peroxidases. These two proteins have Mrs of 83 and ...
Polyamines, IAA and ABA during germination in two recalcitrant seeds: Araucaria angustifolia (Gymnosperm) and Ocotea odorifera (Angiosperm)
(OXFORD UNIV PRESS, 2011)
Background and Aims Plant growth regulators play an important role in seed germination. However, much of the current knowledge about their function during seed germination was obtained using orthodox seeds as model systems, ...
Structural aspects of the zygotic embryogenesis of Acca sellowiana (O. Berg) Burret (Myrtaceae)
(SOC BOTANICA BRASIL, 2009)
(Structural aspects of the zygotic embryogenesis of Acca sellowiana (O. Berg) Burret (Myrtaceae)). Acca sellowiana has anatropous, bitegmic and crassinucellate ovules. The outer and inner integuments are double-layered ...
Ovule and megagametophyte development in selected species of apeibeae and grewieae (malvaceae-grewioideae) from south America and its systematic implications
(CSIRO Publishing, 2016)
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. ...
Ovule and megagametophyte development in selected species of Apeibeae and Grewieae (Malvaceae–Grewioideae) from South America and its systematic implications
(Csiro Publishing, 2016-08)
Ovule and female gametophyte development in C. argutus, L. divaricata and T. semitriloba was analyzed. The ovules of all species are anatropous, bitegmic and crassinucellate mixed type. The micropyle of the studied species ...
Expression of cell wall proteins in seeds and during early seedling growth of Araucaria araucana is a response to wound stress and is developmentally regulated
(1991)
Araucaria araucana seeds and seedlings respond to wounding after 48 h with a 3- to 4-fold increase of hydroxyproline-rich glycoproteins (HRGP) in the cell walls of the embryo and with a 15-fold increase in the cell walls ...
Gene expression analysis at the onset of aposporous apomixis in immature inflorescences of Paspalum notatum
(Springer, 2008-05)
Apomixis is a route of asexual reproduction through seeds, that progresses in the absence of meiosis and fertilization to generate maternal clonal progenies. Gametophytic apomicts are usually polyploid and probably ...
Embryology and seed development of Syngonanthus caulescens (Poir.) Ruhland (Eriocaulaceae-Poales)
(Elsevier B.V., 2007-02-01)
The embryology and the seed development of Syngonanthus caulescens are presented. This species possesses: a bithecous and tetrasporangiate anther, with a four-layered wall, a conspicuous endothecium of the baseplate type, ...