ADVANCED PLANT PHYSIOLOGY WILKINS PDF
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Physiological role of water, Distribution of water in plant cells, Movement of water in Advanced plant physiology, , edited by Malcolm B. Wilkins. Pitman. Download Citation on ResearchGate | Advanced plant physiology / edited by Malcolm B. Wilkins | Incluye bibliografía Reimpresión en , , , PDF | This book has tremendous importance, especially for those who are first degree biology students and A Laburatory Manual for Introduction Plant Physiology Advanced Plant Physiology. Jan M B Wilkins.
Maximum rate of leaf expansion is achieved early in development of a leaf. In flue-cured tobacco phosphorus and potassium concentrations remain constant during growth, whereas nitrogen, calcium and magnesium concentrations decrease. In Oriental tobacco the concentrations of nitrogen, phosphorus, potassium and calcium decrease during the growing season. However, Burley tobacco accumulates relatively greater amounts of nitrogen, phosphorus and potassium during the first half of the growing season relative to dry matter accumulation.
Maximum growth per unit leaf weight occurs 14 to 21 days after transplanting, whereas maximum dry matter accumulation per day occurs 50 to 55 days after transplanting. Leaf development including senescence is controlled genetically and decreased chlorophyll and protein and increased nicotine contents are important changes associated with leaf senescence. Maximum nicotine content of leaf occurs at successively higher stalk positions as the plant matures.
Abdoh, Y. Pirelahi: Alkaloid content of tobacco seeds; Nature Lond. Alworth, W. Liebman und H. Rapoport: The biosynthesis of nicotine in Nicotiana glutinosa from carbon dioxide — Formation of the pyrrolidine ring; J. Arcila, J. Mohapatra: Development of tobacco seedling, 2. Morphogenesis during radicle protrusion; Tob. Mohapatra: Development of tobacco seedling, 3. Morphogenesis during plumule emergence and post-emergence development; Tob.
Atkinson, W. Bush und J. Sims: Dry matter and nutrient accumulation in Burley tobacco; Tob. Avery, G. Balazs, E. Gaborjanyi und Z. Kiraly: Leaf senescence and increased virus susceptibility in tobacco — The effect of abscisic acid; Physiol.
Plant Pathol. Blaim, K. Blatt, C. Sponagle: Effects of 2-chloro-ethylphosphonic acid and nitrogen fertilizer on flue-cured tobacco growth and maturity; Can. Plant Sci.
Boussiba, Samy, und Ames E. Richmond: Abscisic acid and the after-effect of stress in tobacco plants; Planta Berl.
Bush, L. Sims und W. Atkinson: Physiology of nitrogen fractions of high and low alkaloid tobacco; Proc. Sixth Int. Sci, Congr. Calvin, M. Benson: The path of carbon in photosynthesis; Science Wash. Campbell, R. Chilton, M. Clough, B. Milthorpe: Effects of water deficit on leaf development in tobacco; Aust, J.
Plant Physiol, 2 Crum, S. Cundiff, John S. Dawson, R. Specificity of the nicotine-nornicotine conversion; J. Chem, 44 — Dawson, R, F.
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Solt: Estimated contributions of root and shoot to the nicotine content of the tobacco plant; Plant Physiol. Bethesda 34 — Garner, W. Gawande, M. Mohapatra und W.
Johnson: Effect of seed size and pelletization on tobacco seed ger-minaton under varying temperature regimes; Tob.
Gous, P. Terrill und W. Kroontje: Effects of soil fumigation and the form of nitrogen on the growth, yield and value of tobacco grown on two soil types, I.
Plant growth and yield; Agron. Hackett, C. Rawson: An exploration of the carbon economy of the tobacco plant, II. Patterns of leaf growth and dry matter partitioning; Aust. Plant Physiol. Hamilton, J. Lowe: Changes in the concentration of proteins, amino acids and ammonia in Burley tobacco during air curing; Tob.
Harris, Joseph B. Howell, S. Huffaker, R.
Ion Homeostasis in NaCl Stress Environments.
Steward, Academic Press, Inc. Hunt, Warren F. Loomis: Carbohydrate-limited growth kinetics of tobacco Nicotiana rustica L. Bethesda 57 — Il'in, G. Lovkova: Biosynthesis of nicotine and transformation of nitrogenous substances in tobacco sprouts; Biochemistry 24 a — Lovkova: Transformation of nicotine and amino acids in the ripening tobacco seed; Biochemistry 24 b The first and the main one considers the water movement through the leaf parenchyma towards the liquid-aerial interface in the inner part of leaf, and then in the vapor phase through the leaf intercellular filled with air towards the stomatal pores of the leaf epidermis.
The second way, which is an auxiliary one and runs parallel to the first, it can be verified through the parenchyma to the liquid-aerial interface in the outer layer of the epidermis cells and, during the vapor phase, through the cuticle to the atmosphere. When there is a minimum transpiration, the water in the liquid phase is transferred to the outer layer of the leaf and expelled like drops: this phenomenon is known as exudation.
This phenomenon occurs by the hydathodes. It is produced by a positive pressure developed in the xylem as a consequence of radicular pressure. The volume of water exudated by the phenomenon varies from a few drops to hundreds of milliliters, having an extremely variable composition Wilkins, Generally, it can be said that the roots function as passive absorption surfaces by which the water is pushed up through developing forces in the stem loss surfaces.
However, when the transpiration level is low and the soil is humid, hot and aired, the roots work as osmometers, producing radicular pressure, which sometimes causes exudation Kramer, Water absorption can be affected by the variation in the solutes accumulation in the xylem, which occurs as a result of metabolic fluctuation activity Hales, ; Arisz et al.
Advanced plant physiology
This way, the radicular pressure is reduced by the temperature decrease, inorganic nutrients retention and metabolic inhibitors Sutcliffe, The roots absorb ions from the diluted soil solution and transport them to the xylem. This water potential decrease in the xylem, causes a motor force to the water absorption, resulting in positive hydrostatic pressure in the xylem. Thus, the whole root acts as a cell and the multicelular radicular tissue behaves as an osmotic membrane, establishing a positive hydrostatic pressure in the xylem responding to the accumulation of solutes.
The radicular pressure is more evident in well-moisten hydrated plants under low transpiration and humidity conditions. In dryer conditions, when the transpiration level is higher, the water is rapidly absorbed by the leaves and is lost in the atmosphere, not developing a positive pressure in the xylem. In spite of that questions, the objective of this study was evaluated the comportment of Coleus blumei plants under stress salinity conditions.
The shoots were cut at 10 cm from the soil surface and the remaining stems interlinked to glass tubes 3 mm x 1. Then, the soils were treated with different NaCl concentrations of 0.
Readings were taken in a sunny day without atmospheric turbulence at 12 p.By concentrating efforts on a few systems, results obtained by one research group would have a synergistic effect on the research of others using the same system. Finally, plant development can be influenced by the direction of the gravity vector.
Gravitropism in Multicellular Plants Gravitropic curvature in response to a change in the gravity vector can occur in most stems and roots as well as some flowers and fruits, but rarely in leaves. Mylonas, V. Macnicol, P. Research on gravitropism in stems might well concentrate on Arabidopsis, tomato, and peas, in which gravitropic mutants exist.
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