A Functional Biology of Crop Plants by Vincent P. Gutschick

By Vincent P. Gutschick

1. useful Biology and Plant Strategies.- A. useful Biology.- B. the necessities on vegetation of their progress and Function.- C. The Abiotic surroundings: Plant Autecology.- (i) Resources.- (ii)Resource demanding situations confronted by means of Plants.- D. Adaptive Strategies.- (i) software of the Strategic View.- (ii) Explaining variations, in sort and in significance, basically in Wild Growth.- (iii) Indicating Routes to Crop Improvement.- (iv) Examples of goal services and Adaptations.- E. 4 rules of Adaptive Strategies.- F. The Calculation of full of life expenditures and Benefits.- (i) 3 varieties of Costs.- (ii) How strength charges have an effect on progress and Yield.- (iii) Optimizing the Energetics of a Plant.- G. towards a Quantification of chance and probability Management.- H. whilst and the way speedy to installation Strategies.- I. Effectiveness and obstacles of Strategic Adaptations.- (i) inner and exterior Limitations.- (ii) boundaries to Adaptive Strategies.- J. extra Strategic concerns for the Biotic Environment.- 2. Mineral Nutrition.- A. crucial parts within the surroundings and Their Availability to Plants.- (i) full of life charges of buying Nutrients.- (ii) Soil Processes.- B. 4 kinds of Challenges.- (i) Low Nutrient Availability in Soil.- (ii) Physiological boundaries on inner shipping and Use.- (iii) critical Imbalances between Nutrients.- (iv) Toxicity of Nonnutrients.- C. results of dietary Challenges.- (i) basic and Ecological Challenges.- (ii) Agricultural Consequences.- D. Adaptive Responses, Their charges and Benefits.- (i) Autecological Responses.- (ii) Responses inside Plant Communities.- three. Photosynthesis.- A. CO2, Photons, and Their Availability to the Plant.- (i) the fundamental Photosynthetic response and Its Constraints.- (ii) CO2 and Water Exchange.- (iii) CO2 and Photon shipping in complete Canopies.- (iv) Measures of Photosynthesis.- (v) web Determinants of Photosynthesis.- B. strength and Soil source makes use of: expenses and Benefits.- (i) charges and merits in Photosynthesis Alone.- (ii) Optimizing Leaf Energetics: An Example.- (iii) Use of Water and Mineral Nutrients.- (iv) Miscellaneous expenditures and Benefits.- C. Challenges.- (i) Low or Erratic Availability of Resources.- (ii) Excesses and Imbalances.- (iii) shipping Limitations.- (iv) Nonresource Challenges.- D. outcomes of demanding situations to Photosynthesis.- (i) Ecological Consequences.- (ii) Agricultural Consequences.- E. Adaptive Responses, Their charges and Benefits.- (i) Responses to Low or Erratic source Availability.- (ii) Responses to Excesses and Imbalances.- (iii) Responses to move Limitations.- (iv) Responses to Nonresource Challenges.- four. Water Relations.- A. Introduction.- (i) Water in Plant constitution and Function.- (ii) Water strength and Terminology.- (iii) Water delivery in Soil.- (iv) Water Uptake by way of Roots.- (v) Water delivery from Roots to Leaves.- (vi) Water intake in Photosynthesis.- (vii) Cost-Benefit Analyses in Water Use.- B. Challenges.- (i) Low or Erratic Availability of Water.- (ii) shipping Limitations.- (iii) extra Water: Flooding.- (iv) Salinity, a Nonresource Hazard.- C. results of Challenges.- (i) Ecological Consequences.- (ii) Agricultural Consequences.- D. Adaptive techniques, Their expenses and Benefits.- (i) options for Low Water Availability.- (ii) innovations of Salt Tolerance.- (iii) thoughts of Flood Tolerance.- (iv) Responses inside of Ecosystems.- five. Integrative Processes.- A. New positive factors in long term Coordination of All source Uses.- B. Reproduction.- (i) The Vegetative-to-Reproductive Switch.- (ii) Seeds: Many and Small, or Few and Large?.- (iii) Senescence and source Scavenging.- (iv) Flower and Fruit Abortion.- (v) Pollination.- C. Germination.- D. Morphogenesis, particularly Photomorphogenesis.- E. keep an eye on of Biotic Interactions.- (i) Pests and Diseases.- (ii) Symbionts.- (iii) Conspecifics and Their Gene Pool.- References.- Symbols.

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The "catching up" in late season of the plant with a lower RGRt:=() to a plant with a higher RGRt:=() is significant (Fig. 4). A second factor softening initial RGR differences is the potential to extend the growing season to make the products RGR·ft more nearly equal for different plants ... at some increased risk of loss to the slower-growing and later-growing plant. (4) Over a whole season, additional complicating factors are common. Two factors which may be corrected for, given some tediously acquired data, are: (a) variation of the costs Ci and the dry-matter contents Ii with time or plant size, usually in the direction of increasing Ci and decreasing Ii, and (b) scavenging of the root, nodule, leaf, and other resource-acquiring tissues, meriting a credit of the type discussed in Sec.

For any specific c(x), it must explore the soil a bit wastefully. Some optimal exploration latitude is undoubtedly definable. (4) Invasion-proofing: In competitive growth, an adaptive strategy must be stable against invasion by competing plants that "cheat" in resource use. See Sec. B, item 2, on evolutionarily stable strategies. (5) Adequacy of selection pressure: The specific environmental state under consideration, in which a maximal internal capacity is demanded, must occur frequently enough to make it cost-effective to carry the adaptation potential (Sec.

4) Operational and capital costs of the so-called pH-stat In the next Section, we shall see how plants' use of NOi" or NHt respectively generates OIr or H+ ions that must be neutralized For nitrate metabolism, malic acid is typically produced from neutral precursors, ultimately glucose. If malate ions are simply retained in the shoot (Fig. 3), they represent a capital carbon (energy) expenditure Cp of approximately 1/3 mol glu/g N or 4 g glu/g N (less a modest credit for energy recovered as A'IP in getting to the malate stage).

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