scholarly journals Cytochemical investigations of the megasporocyte and embryo sac in Lilium regale at various stages of development

2015 ◽  
Vol 44 (3) ◽  
pp. 335-347
Author(s):  
C. Marciniak
Keyword(s):  
Endoplasmic Reticulum ◽  
Embryo Sac ◽  
Parallel Systems ◽  
Storage Material ◽  
Stages Of Development ◽  
Prophase I ◽  
Embryo Sac Development ◽  
Cytoplasmic Bodies ◽  
Lilium Regale ◽  
Lipid Inclusions

During megasporocyte and embryo sac development in <i>Lilium regale</i>, characteristic changes were noted within the cytoplasm. In the course of prophase I there appear parallel systems of endoplasmic reticulum cisternae which further transform to cytoplasmic bodies built of protein and different-sized lipid inclusions. During maturation of the embryo sac the cytoplasmic bodies and lipid inclusions synthesized during prophase I undergo hydrolysis and constitute storage material utilized during maturation of the embryo sac.

Ultrastructural Observation on Embryo Sac Development inPhaius tankervilliae(Aiton)Bl.

2012 ◽  
Vol 30 (2) ◽  
pp. 188 ◽  
Author(s):  
Dong-Mei LI ◽  
Cheng-Hou WU ◽  
Xiu-Lin YE ◽  
Cheng-Ye LIANG
Keyword(s):  
Embryo Sac ◽  
Ultrastructural Observation ◽  
Embryo Sac Development

Embryo sac development and endogenous gibberellins in pollinated and unpollinated ovaries of walnut (Juglans regia)

1994 ◽  
Vol 91 (1) ◽  
pp. 37-44 ◽  
Author(s):  
Francisco R. Tadeo ◽  
Manuel Talon ◽  
Eric Germain ◽  
Francoise Dosba
Keyword(s):  
Juglans Regia ◽  
Embryo Sac ◽  
Embryo Sac Development

FINE STRUCTURE IN CELLS OF PEA AND WHEAT EMBRYOS

1959 ◽  
Vol 37 (1) ◽  
pp. 65-72 ◽  
Author(s):  
G. Setterfield ◽  
H. Stern ◽  
F. B. Johnston
Keyword(s):  
Endoplasmic Reticulum ◽  
Plasma Membranes ◽  
Osmic Acid ◽  
Dense Granules ◽  
Cytoplasmic Bodies ◽  
Wheat Embryos ◽  
Electron Microscopes ◽  
Cell Fractions ◽  
Isolated Cell

To provide a basis for relating biochemical findings on isolated cell fractions to cytological structure in situ, embryos of pea and wheat were fixed with osmic acid, sectioned, and observed in phase-contrast and electron microscopes. The nuclei of all cells were similar, showing nuclear membranes, chromosomes, and prominent nucleoli. The cytoplasm contained highly developed structure which presumably reflected the incipient growth condition of the cells. Several cytoplasmic components were common to both embryos: small dense granules, endoplasmic reticulum, mitochondria, presumed proplastids, amyloplasts, irregular bodies, plasma membranes, and plasmodesmata. The small dense granules, presumably ribonucleoprotein particles, occurred profusely, both free and in association with extensively developed endoplasmic reticulum. These particles are probably responsible for the microsomal fractions obtainable from embryos and seedlings. The mitochondria were usually relatively small (0.25−0.5 μ diameter) although groups of very long (5 μ) ones were occasionally found. Bodies resembling mitochondria in size and shape, but lacking cristae, were present and represent either immature mitochondria or proplastids. Reserve material occurred as starch in structurally complex amyloplasts and possibly as protein in the irregular bodies. In addition to these structures cells of the wheat embryos remote from the meristems contained prominent cytoplasmic bodies classified as "dense" and "thick-walled". The dense bodies probably represent stored lipids while the significance of the thick-walled bodies, which showed a variety of forms, is unknown.

Embryo sac development in some representatives of the tribe Cynodonteae (Poaceae)

Bothalia ◽  
1994 ◽  
Vol 24 (1) ◽  
pp. 101-105 ◽  
Author(s):  
A. Strydom ◽  
J. J. Spies
Keyword(s):  
Cynodon Dactylon ◽  
Embryo Sac ◽  
Polygonum Type ◽  
Embryo Sac Development ◽  
Obligate Apomixis ◽  
Chloris Virgata

Chloris virgata Sw., Cynodon dactylon (L.) Pers., Harpochloa falx (L. f.) Kuntze, and Tragus berteronianus Schult. have a Polygonum type of embryo sac development. Unreduced embryo sacs were found in Eustachys paspaloides (Vahl) Lanza Mattei,  Harpochloa falx, and  Rendlia altera (Rendle) Chiov. Both facultative and obligate apomixis were observed. The Hieracium type of embryo sac development was observed in the aposporic specimens.

The embryo sac development of Manfreda elongata (Asparagaceae)

Flora ◽  
2019 ◽  
Vol 260 ◽  
pp. 151480
Author(s):  
Ángel Martín Barranco-Guzmán ◽  
Alejandra G. González-Gutiérrez ◽  
Benjamín Rodríguez-Garay
Keyword(s):  
Embryo Sac ◽  
Embryo Sac Development

scholarly journals Phenotypic plasticity of aposporous embryo sac development in Hieracium praealtum

2019 ◽  
Vol 14 (8) ◽  
pp. 1622981 ◽  
Author(s):  
Martina Juranić ◽  
Susan D. Johnson ◽  
Anna M. Koltunow
Keyword(s):  
Phenotypic Plasticity ◽  
Embryo Sac ◽  
Embryo Sac Development
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