Results 131 to 140 of about 1,985 (173)
Molecular Plant, 2008 As a complex wall system in flowering plants, the pollen outer wall mainly contains aliphatic sporopollenin; however, the mechanism for synthesizing these lipidic precursors during pollen development remains less well understood.
Zheng Yuan, Na Li, Wen-Juan Yu
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Tapetum Corporis Callosi: Carpet of the Brain
Journal of the History of the Neurosciences, 2007The tapetum is described by Johann Christian Rell (1759-1813). It is formed primarily by decussating fibers in the splenium of the corpus callosum that arch over the atrium of the lateral ventricle and course inferiorly in the lateral wall of the posterior, and somewhat into the temporal horns, of the lateral ventricle.
Levent, Sarikcioglu +2 more
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Fluorescence in the Tapetum of the Cat's Eye
JAMA: The Journal of the American Medical Association, 1963The fluorescent property of the subretinal tapetum of various mammals was first reported by Hosoya in 1929. 1 Recent investigations on the composition of this tissue have revealed the presence of zinc cysteinate in high concentrations in the tapeta of carnivores 2,3 and the occurrence of crystals of riboflavin in the tapetum of the lemur. 4 We recently
J H, ELLIOTT, S, FUTTERMAN
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The fine structure of the tapetum cellulosum
Experimental Eye Research, 1963This paper reports detailed observations on the fine organization of the tapetal cell in the cat, describes some changes in structure produced by immersion in solutions of varying tonicity and discusses their relevance to the mechanism of tapetal reflection.
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Plant Systematics and Evolution, 1995
A combination tapetum consisting of a cellular, parietal component and a plasmodial component occurs inSchizaea pectinata. A single, tapetal initial layer divides to form an outer parietal layer which maintains its cellular integrity until late in spore wall development.
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A combination tapetum consisting of a cellular, parietal component and a plasmodial component occurs inSchizaea pectinata. A single, tapetal initial layer divides to form an outer parietal layer which maintains its cellular integrity until late in spore wall development.
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Diversification and evolution of the tapetum
1991Abstract Two kinds of tapeta are usually distinguished in angiosperms: the parietal or secretory type, and the amoeboid or periplasmodial type. However, the tapetum is present in all major groups of land plants and exhibits a great range of forms.
PACINI, ETTORE, FRANCHI, GIAN GABRIELE
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Spectral Reflexion Factor of the Cat's Tapetum
Nature, 1951THE physiological function of the tapetum in the eyes of animals of nocturnal habit is uncertain. However, it may fairly be assumed that by reflecting light incident on the retina back through the layer of end-organs, the tapetum reduces in some measure the absolute threshold for vision1. Since the tapetum is coloured, spectral sensitivities determined
R, GUNTER, H G W, HARDING, W S, STILES
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Electron Microscopy of Retinal Tapetum (Caiman crocodilus)
Albrecht von Graefes Archiv f�r Klinische und Experimentelle Ophthalmologie, 1978The distribution and ultrastructure of the retinal tapetum lucidum in Caiman crocodilus is described. In the light adapted eye the tapetum is recognized in the superior half of the fundus. It consists of guanine containing crystalline platelets which are spread almost over the entire retinal pigment epithelial cells which can be divided into different ...
C E, Dieterich, H J, Dieterich
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Review of Palaeobotany and Palynology, 2014
The purpose of this work was to study in detail the successive stages of pollen wall development in Juniperus communis and intimate connection between the microspores and nutritive tapetum with TEM. Another goal was to clear up the mechanisms underlying the developmental processes.
Nina Gabarayeva +2 more
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The purpose of this work was to study in detail the successive stages of pollen wall development in Juniperus communis and intimate connection between the microspores and nutritive tapetum with TEM. Another goal was to clear up the mechanisms underlying the developmental processes.
Nina Gabarayeva +2 more
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Tapetum: regulation and role in sporopollenin biosynthesis in Arabidopsis
Plant Molecular Biology, 2013Pollen acts as a biological protector for protecting male sperm from various harsh conditions and is covered by an outer cell wall polymer called the exine, a major constituent of which is sporopollenin. The tapetum is in direct contact with the developing gametophytes and plays an essential role in pollen wall and pollen coat formation.
Liang, Liu, Xiu-duo, Fan
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