By George W. Martin, C.J. Alexopoulos, M.L. Farr
Read Online or Download The Genera of the Myxomycetes PDF
Similar plants books
Chemical Grouting and Soil Stabilization (Civil and Environmental Engineering)
Following transferring developments from remedial to preventive makes use of of grouting practices, this 3rd version covers all points of chemical grouting equipment and functions. This reference highlights new floor development suggestions in addition to fresh concepts in soil amendment and stabilization approaches.
Medicinal and Aromatic Plants IV
This quantity includes 28 chapters on biotechnology of medicinal and fragrant vegetation, and bargains with the distribution, monetary significance, traditional propagation, micropropagation, overview of tissue tradition paintings, and the in vitro creation of pharmaceutical compounds in a number of species of Ammi, Bergenia, Canavalia, Capsicum, Cassia, Cephaelis, Cornus, Cucurbita, Elettaria, Eupatorium, Genipa, Gentiana, Gypsophila, Hygrophila, Leontopodium, Nerium, Picrasma, Polygonum, Ptelea, Rheum, Scopolia, Silene, Solanum, Strophanthus, Tagetes, Thymus, and Uncaria.
Post-Transcriptional Control of Gene Expression in Plants
A contemporary quantity of this sequence (Signals and sign TransductionPathways in vegetation (K. Palme, ed. ) Plant Molecular Biology26, 1237-1679) defined the relay races during which signs are transported in vegetation from the websites of stimuli to the gene expression equipment of the cellphone. a part of this equipment, the transcription equipment, has been good studied within the final twenty years, and plenty of vital mechanisms controlling gene expression on the transcriptional point were elucidated.
Vegetation of the Tropical Pacific Islands
Written via the best specialists at the plant range and ecology of the Pacific islands, this e-book is a magisterial synthesis of the crops and landscapes of the islands of the Pacific Ocean. it truly is prepared through island staff, and contains details on geography, geology, phytogeographic relationships, and human impacts on crops.
- Lipids and Lipid Polymers in Higher Plants
- Fungal Pathogenesis in Plants and Crops: Molecular Biology and Host Defense Mechanisms, Second Edition (Books in Soils, Plants, and the Environment)
- Magic Mushrooms Around the World: A Scientific Journey Across Cultures and Time - The Case for Challenging Research and Value Systems
- Hallucinogenic Plants
- Heavy Metal Stress in Plants
Additional resources for The Genera of the Myxomycetes
Sample text
Generally the individual sporangium is of characteristic shape, size range, and color and in most species is rather consistently stalked or sessile. The sporangia of a cluster are seated on a typically horny, membranous sheath, the hypothallus, in some species very conspicuous and in others difficult to see or not visible. It is secreted by the plasmodium at the time of sporulation, or simply represents the plasmodial sheath. Lime, when present, may be in the form of amorphous granules or of highly characteristic crystals.
The sclerotium. Under the influence of desiccation, adversely high or low temperature, lack of food, low pH, high osmotic pressure, sublethal doses of heavy metals, and probably other unfavorable conditions, the phaneroplasmodium may become transformed into a hard, horny resting stage, the sclerotium. Within the sclerotium, the protoplasm becomes aggregated in small masses or macrocysts ("spherules" when formed in liquid culture), each surrounded by a membrane (Jump, 1954). This state may be induced in the laboratory by transfer to a non-nutrient salt solution or by addition of mannitol to the growth medium (Gorman and Wilkins, 1980).
The protoplasm flows in one direction for about sixty to ninety seconds, the flow stops, and then the protoplasm flows in the reverse direction. In the phaneroplasmodium, the protoplasm is very granular, the inner and outer layers of the veins distinct, the advancing, fleshy fans conspicuous, and the margin definite. A second type of plasmodium, the aphanoplasmodium, is known only from a few species of Stemonitis, Comatricha, Lamproderma, and one species of Amaurochaete (Farr, 1982), but most of the Stemonitaceae may be expected to conform to this type.