Sandy Dickson

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This review commemorates and examines the significance of the work of Isobel Gallaud more than 100 years ago that first established the existence of distinct structural classes (Arum-type and Paris-type) within arbuscular mycorrhizal (AM) symbioses. We add new information from recent publications to the previous data last collated 10 years ago to consider(More)
* This study investigated effects of plant density and arbuscular mycorrhizal (AM) colonization on growth and phosphorus (P) nutrition of a cultivar of wheat (Triticum aestivum) that often shows early AM-induced growth depressions. * Two experiments were conducted. Expt 1 had three plant densities and one soil P concentration. Expt 2 had two plant densities(More)
Zinc deficiency is one of the most commonly reported plant and human nutrient deficiencies worldwide. Conversely, Zn is also a common environmental contaminant, significantly reducing plant growth. These contrasting effects of Zn on plant growth and nutrition have been the focus of a considerable number of studies; however, most studies focus on plant(More)
 A method has been developed for the visualisation and three-dimensional (3D) measurement of mycorrhizal fungal structures inside plant roots. Sections of Allium porrum L. roots colonised by Glomus sp. 'City Beach' (WUM 16) and Lilium sp. roots colonised by Scutellospora calospora (Nicol. & Gerd.) Walker & Sanders (WUM 12(2)) were stained with acid fuchsin.(More)
Monoxenic symbioses between the arbuscular mycorrhizal (AM) fungus Glomus intraradices and two nontransformed tomato root organ cultures (ROCs) were established. Wild-type tomato ROC from cultivar “RioGrande 76R” was employed as a control for mycorrhizal colonization and compared with its mutant line (rmc), which exhibits a highly reduced mycorrhizal(More)
It has been known for more than 40 years that vacuolate organisms can be induced to sediment with ultrasound. However, robust indicators are still needed to compare the efficacy of different treatments. A repeatable index is proposed that makes it possible to quantify the ultrasonic induced sedimentation. The procedure is used to monitor the long term(More)
The antigenic and functional properties of splenic sinusoidal lining cells (SLC) have not been studied extensively. Some investigators have suggested that SLC are actively phagocytic, and thus part of the mononuclear phagocyte system. Others dispute this and assign the functions of endothelial cells to the SLC. During studies in situ of phenotypic(More)
Macrophages (M phi s) are an important component of the immune response and mediate numerous other functions. Phenotypic and functional subsets of circulating monocytes have been described, but few similar studies have analyzed M phi s in human tissues. By use of immunohistochemical techniques and a large number of monoclonal antibodies, the presence and(More)
A highly chemiluminescent reporter molecule, acridinium ester (AE), was tethered to single-stranded oligonucleotide probes and hybridized to complementary as well as mismatched target sequences. When tethered to single-stranded probes, AE was readily hydrolyzed by water or hydroxide ion. In contrast, when hybridized to a complementary target, hydrolysis of(More)
Most of the monoclonal antibodies (MoAbs) to T-lymphocyte subsets are, with few exceptions thought to recognize antigens (Ags) unique to T-cells. The authors examined the distribution of cells reacting with MoAbs to the helper/inducer (OKT4, anti-Leu-3a,b) and suppressor/cytotoxic (OKT8, anti-Leu-2a) T-lymphocyte subsets and to "pan T" Ags (anti-Leu-1,(More)