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" Architecture of chloroplast thylakoid networks in state I and in state II "


Document Type : Latin Dissertation
Language of Document : English
Record Number : 54035
Doc. No : TL23989
Call number : ‭3461777‬
Main Entry : Ophir Rav-Hon
Title & Author : Architecture of chloroplast thylakoid networks in state I and in state II\ Ophir Rav-Hon
College : The Weizmann Institute of Science (Israel)
Date : 2008
Degree : Ph.D.
student score : 2008
Page No : 50
Abstract : The light-harvesting and energy-transducing functions of the chloroplast are carried out within the thylakoids-flattened vesicles that form extensive lamellar systems throughout a significant fraction of the chloroplast volume. Thylakoid membranes are differentiated into two morphological and functional domains, called grana and stroma lamellae, which are arranged in a complex 3D architecture. In my work, I used dual-axis electron microscope tomography combined with high-pressure freezing and freeze substitution methods to determine the three-dimensional organization of thylakoid networks within lettuce and Arabidopsis leaves. The analysis was performed on leaves pre-adapted to either state I or state II, which define the two major light-adapted states of the photosynthetic apparatus. The results obtained reveal detailed information on the spatial organization of thylakoid membranes and provide important insights into their function, chromatic adaptation, and biogenesis. Comparison of the network of higher plants and cyanobacteria indicates a high degree of preservation of structural motifs during network evolution.
Subject : Biological sciences; Chloroplasts; Lamellae; Thylakoid networks; Cellular biology; Biomechanics; 0648:Biomechanics; 0379:Cellular biology
Added Entry : Z. Reich
Added Entry : The Weizmann Institute of Science (Israel)
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