Ecological principles in range evaluation

Author: Dyksterhuis, E.J. Description: Range ecology has certain unique features, but its fundamentalsare those of all ecology. Thus, current perspective in range evalua-tion was expressed more than 30 years ago by the marine ecologistwho postulated: If the problem covers enormous numbers of or-ganisms, or a large extent of space, or a long period of time, theeffect of minor factors is so deeply submerged that we are not ableto trace them. The greater the magnitude of the problem the fewerthe factors which need to be considered in its analysis, and theless…

See more and a link to full text

North American Prairie

Author: J.E. Weaver Description: TO MOST AMERICANS, the word “Prairie” suggests either a romantic element in pioneer fiction or a vast expanse of level land which must be crossed in going from one coast to another. But to the botanist, the American Prairie is a wonderfully complex society of living organisms.This book tells the story of that society-the variety of its inhabitants; the constitution of its several communities; the internal struggles for domination of the society; and the battles of the Prairie as a whole against its two most vicious…

See more and a link to full text

The Small Arthropods of a Molinia Fen at Cothill

Author: Macfadyen, A. Description: Cothill, Berkshire, which is 5 miles south-west of Oxford and marked on theOrdnance Survey maps as ‘Parcel 6’ (Nat. Grid Ref. 41/463998). The area inquestion is described more fully in the next section; it was chosen for studybecause it appeared to have a rather uniform vegetation, a shallow inhabitable soil and therefore might be expected to have a relatively simple soil fauna and also because some work had been done on the botany of the larger plants and the peat by Prof. A. R. Clapham of…

See more and a link to full text

The promise and the potential consequences of the global transport of mycorrhizal fungal inoculum

Author: Schwartz, M.W.; Hoeksema, J.D.; Gehring, C.A.; Johnson, N.C.; Klironomos, J.N.; Abbott, L.K.; Pringle, A. Description: Advances in ecology during the past decade have led to a much more detailed understanding of the potential negative consequences of species’ introductions. Moreover, recent studies of mycorrhizal symbionts have led to an increased knowledge of the potential utility of fungal inoculations in agricultural, horticultural and ecological management. The intentional movement of mycorrhizal fungal species is growing, but the concomitant potential for negative ecological consequences of invasions by mycorrhizal fungi is poorly understood. We…

See more and a link to full text

Leaf Senescence: Correlated with Increased Levels of Membrane Permeability and Lipid Peroxidation, and Decreased Levels of Superoxide Dismutase and Catalase

Author: Dhindsa, R.S.; Plumb-Dhindsa, P.; Thorpe, T.A. Description: The changes in membrane permeability (soluble leakage), lipid peroxidation, and activities of superoxide dismutase (SOD) and catalase have been studied during in situ senescence of leaves of Nicotiana tabacum L., cv. Wisconsin 38. After full leaf expansion was reached there was a rapid, almost linear increase in the rate of 86Rb leakage from the preloaded leaf discs, with leaf age. Parallel with this increase in membrane permeability was a cumulative increase in the level of lipid peroxidation. At the same leaf age…

See more and a link to full text

The biological activities of 26 gibberellins in nine plant bioassays

Author: Crozier, A.; Kuo, C.C.; Durley, R.C.; Pharis, R.P. Description: The activities of gibberellins A1–A15, A17–A27 and A8-glucoside are compared, using original and previously published data, in the barley (Hordeum vulgare L.) aleurone a-amylase, Progress No. 9 dwarf pea (Pisum sativum L.), lettuce (Lactuca sativa L.), ‘Tan-ginbozu’ dwarf rice (Oryza sativa L.), cucumber (Cucumis sativus L.), and the d-1, d-2, d-3, and d-5 maize (Zea mays L.) mutant bioassays. Gibberellins A3 and A7 show high activity in most bioassays. Gibberellins A9, A10, A23, and A24 are species specific in their…

See more and a link to full text

Design and synthesis of 3-pyridylacetamide derivatives as dipeptidyl peptidase IV (DPP-4) inhibitors targeting a bidentate interaction with Arg125

Author: Miyamoto, Yasufumi; Banno, Yoshihiro; Yamashita, Tohru; Fujimoto, Tatsuhiko; Oi, Satoru; Moritoh, Yusuke; Asakawa, Tomoko; Kataoka, Osamu; Takeuchi, Koji; Suzuki, Nobuhiro; Ikedo, Koji; Kosaka, Takuo; Tsubotani, Shigetoshi; Tani, Akiyoshi; Funami, Miyuki; Amano, Michiko; Yamamoto, Yoshio; Aertgeerts, Kathleen; Yano, Jason; Maezaki, Hironobu Description: We have previously discovered nicotinic acid derivative 1 as a structurally novel dipeptidyl peptidase IV (DPP-4) inhibitor. In this study, we obtained the X-ray co-crystal structure between nicotinic acid derivative 1 and DPP-4. From these X-ray co-crystallography results, to achieve more potent inhibitory activity, we targeted Arg125 as…

See more and a link to full text

Phytochemical Methods: A Guide to Modern Techniques of Plant Analysis

Author: Harborne, A. J. Description: This third edition of Phytochemical Methods is, as its predecessors, a key tool for undergraduates, research workers in plant biochemistry, plant taxonomists and any researchers in related areas where the analysis of organic plant components is key to their investigations. Phytochemistry is a rapidly expanding area with new techniques being developed and existing ones perfected and made easier to incorporate as standard methods in the laboratory. This latest edition includes descriptions of the most up-to-date methods such as HPLC and the increasingly sophisticated NMR and…

See more and a link to full text

Seed Identification Manual

Author: Martin, A. C. & Barkley, W. D. Description: First published in 1961, this text deals exclusively with seed identification to help agriculturalists, foresters, wildlife biologists, and others interested in land-use programs identify the seeds in their particular fields of interest. Subject headings: Nature; Plants; Science; Life Sciences; Botany; Ecology; Seed identification Publication year: 1961 Publisher: University of California Press Pages: 221 Find the full text: https://books.google.com/books?hl=en&lr=&id=UlWQ97mR95YC&oi=fnd&pg=PA1&ots=3ouUh1gUhe&sig=qsqMBIfBiW1XB253nGrQtyy2NoU#v=onepage&q&f=false Find more like this one (cited by): https://scholar.google.com/scholar?cites=4976124359874531598&as_sdt=1000005&sciodt=0,16&hl=en Type: Book Serial number: 3104

See more and a link to full text

Soil-plant water relations, root distribution and biomass partitioning in Lupinus albus L. under drought conditions

Author: Rodrigues, M.L.; Pacheco, C.M.A.; Chaves, M.M. Description: Lupinus albus L. from different climatic origins responded to a 15 d period of water shortage during flowering by losing 50% of the total leaf canopy and gaining 55% in stem dry weight. Water deficits also led to a significant increase in the fine root length density and a slight increase in the fine root dry weight. The latter increase was especially pronounced in the deeper soil layers. Some marginal differences among genotypes were observed in the responses. Stomatal closure by midday…

See more and a link to full text
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.