Results 61 to 70 of about 10,623 (232)

The technical and practical implementation of fundus photography in equids

Equine Veterinary Education, EarlyView.
Summary Background Fundus photography is an important diagnostic tool in human and veterinary medicine. Advances in research are increasing its accessibility in human medicine. However, there is a lack of studies on modern fundus photography in animals, particularly in horses. Objectives To assess the use of a portable fundus camera developed for human
I. Vierling, B. Wollanke, V. Franzen
wiley   +1 more source

Evolution of the tapetum. [PDF]

Transactions of the American Ophthalmological Society, 2002
To review, contrast, and compare current known tapetal mechanisms and review the implications for the evolution of the tapetum.Ocular specimens of representative fish in key piscine families, including Acipenseridae, Cyprinidae, Chacidae; the reptilian family Crocodylidae; the mammalian family Felidae; and the Lepidopteran family Sphingidae were ...
Schwab, Ivan R, Yuen, Carlton K, Buyukmihci, Nedim C, Blankenship, Thomas N, Fitzgerald, Paul G   +4 more
openaire   +1 more source

Abolition of the Tapetum Suicide Program Ruins Microsporogenesis [PDF]

Plant and Cell Physiology, 2006
Microsporogenesis in angiosperms takes places within the anther. Microspores are surrounded by a layer of cells, the tapetum, which degenerates during the later stages of pollen development with cytological features characteristic of programmed cell death (PCD). We report herein that the expression of AtBI-1, which suppresses Bax-induced cell death, in
Takahiro, Kawanabe, Tohru, Ariizumi, Maki, Kawai-Yamada, Hirofumi, Uchimiya, Kinya, Toriyama   +4 more
openaire   +2 more sources

Global transcriptome analysis of two ameiotic1 alleles in maize anthers: defining steps in meiotic entry and progression through prophase I [PDF]

, 2011
Background Developmental cues to start meiosis occur late in plants. Ameiotic1 (Am1) encodes a plant-specific nuclear protein (AM1) required for meiotic entry and progression through early prophase I. Pollen mother cells (PMCs) remain mitotic in most am1
Guo-Ling Nan, Arnaud Ronceret, Rachel C Wang, John F Fernandes, W Zacheus Cande, Virginia Walbot   +5 more
core   +1 more source

Giants in the cold: Morphological evidence for vascular heat retention in the viscera but not the skeletal muscle of the basking shark (Cetorhinus maximus)

Journal of Fish Biology, EarlyView.
Abstract Fewer than 50 of the over 30,000 extant species of fishes have developed anatomical specializations facilitating endothermy in specific body regions. The plankton‐feeding basking shark (Cetorhinus maximus), traditionally classified as an ectotherm, was recently shown to have regionally endothermic traits such as centralized red muscle (RM ...
C. Antonia Klöcker, Axel Schlindwein, Martin C. Arostegui, Ingrid M. Bruvold, Joel V. Wernström, Montserrat Martin‐Armas, David W. Sims, Nicolas Straube, Andreas Altenburger, Claudia Junge   +9 more
wiley   +1 more source

Application of the comet assay in studies of programmed cell death (PCD) in plants

Acta Societatis Botanicorum Poloniae, 2014
Programmed cell death (PCD) in plants is an intensively investigated process. One of the main characteristics of PCD in both animal and plant organisms is the non-random, internucleosomal fragmentation of nuclear DNA, usually analysed using total DNA gel
Maria Charzyńska, Ewa Simeonova, Adam Sikora, Agnieszka Mostowska, Joanna Leśniewska   +4 more
doaj   +1 more source

SEXUAL STERILITY is Essential for Both Male and Female Gametogenesis in Tomato [PDF]

, 2017
Gametogenesis is a key step in the production of ovules or pollen in higher plants. The molecular aspects of gametogenesis are well characterized in the model plant Arabidopsis; however, little information is known in tomato, which is a model plant for ...
Ariizumi Tohru, Ezura Hiroshi, Hao Shuhei, 有泉 亨, 江面 浩   +4 more
core   +2 more sources

Electron microscopy‐based three‐dimensional subcellular imaging of plant male gametophyte

Journal of Integrative Plant Biology, EarlyView.
The Aquilos2 Cryo‐FIB workflows provide practical routes for cryo‐electron tomography and volume imaging in plant structural biology. ABSTRACT Understanding cellular events in three dimensions (3D) is of great importance for the annotation and illustration of biological processes in a contextual way. Imaging techniques based on electron microscopy (EM),
Zhiqi Liu, Zizhen Liang, Mengfei Liao, Yixin Huang, Rui Ma, Jiayang Gao, Weiqi Wang, Tao Ni, Philipp S. Erdmann, Liwen Jiang   +9 more
wiley   +1 more source

ALT-C 2011 call for proposals (proceedings papers) [PDF]

, 2010
This is the call and guidelines document for the submission of full proceedings papers for inclusion in the programme of the September 6-8 2011 ALT Conference.
Slater, John
core  

Vision in the Southern Hemisphere Lamprey Mordacia Mordax: Spatial Distribution, Spectral Absorption Characteristics, and Optical Sensitivity of a Single Class of Retinal Photoreceptor [PDF]

, 2004
The dorso-laterally located eyes of the southern hemisphere lamprey Mordacia mordax (Agnatha) contain a single morphological type of retinal photoreceptor, which possesses ultrastructural characteristics of both rods and cones.
Collin, Shaun P., Hart, Nathan S., Potter, Ian C., Shand, Julia, Wallace, Kate M.   +4 more
core   +2 more sources