By L. D. Swindale (auth.), J. J. Adu-Gyamfi (eds.)
Ultimate luck in exploiting the genetic functions of crops to develop in nutrient-stressed environments of the semi-arid tropics (SAT) calls for a holistic view of meals platforms to make sure that genetic choices for enhanced yields on nutrient-poor soils will truly be followed by way of farmers. This e-book units out to handle the real factor of the way physiological mechanisms of nutrient uptake can top be mixed with genetic concepts to enhance the variation of plants to low-nutrient availability, thereby improving productiveness of nutrient terrible soils within the semi-arid tropics. The e-book examines (i) the sustainability of breeding for low-nutrient environments from the perspective of 3 interrelated disciplines; body structure, breeding, and socio-economics, (ii) candidate mechanisms and physiological qualities to augment uptake and usage efficiencies, (iii) genetic techniques for manipulation of crop vegetation to augment root exudation and entry meals within the rhizosphere, and (iv) box practices and farmers' personal tastes for crop forms grown in low-nutrient environments. eventually, the position of modelling in enhancing nutrient potency in cropping platforms, suggestions for destiny study wishes and techniques have been highlighted. Attended through 50 overseas individuals, this ebook is the end result of the workshop held at ICRISAT-India in the course of 27-30 September 1999 to mark the fruits of the govt of Japan/ICRISAT Project.
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Extra resources for Food Security in Nutrient-Stressed Environments: Exploiting Plants’ Genetic Capabilities
Kluwer Academic Publishers, Dordrecht, The Netherlands (in press) Banziger M, Mugo S and Edmeades G 0 2000 Breeding for drought tolerance in tropical maize ~ conventional approaches and challenges to molecular approaches. In Molecular Approaches for the Genetic Improvement of Cereals for Stable Production in Water-limited Environments. A strategic planning workshop held at CIMMYT, El Batan, Mexico, 21~25 June 1999. Eds. Ribaut J-M and Poland D. pp. 69~72. International Maize and Wheat Improvement Center (CIMMYT).
98, 234-242. Morris R A, Sattell R R and Christensen N W 1992 Phosphorus sorption and uptake from Sri Lankan Alfisols. Soil Sci. Soc. Am. J. 56,1516-1520. Muchhal U S, Pardo J M and Raghothama K G 1996 Phosphate transporters from the higher plant Arabidopsis thaliana. Proc. Nat. Acad. Sci. USA 93, 10519-10523. Mugo S N, Banziger M and Edmeades G 0 1999 The effects of divergent selection for root capacitance in maize. Agronomy Abstracts 67. Otani T and Ae N 1996a Sensitivity of phosphorus uptake to changes in root length and soil volume.
Phosphatase and phytase ectoenzymes can play important roles in catalytic hydrolysis of organic P and subsequent acquisition of soil P by plant roots. Such ectoenzymes can be produced by root-associated microbes that feed on root exudates, or can be excreted into the rhizosphere by the roots themselves in the absence of microbes. Stimulation by P-deficiency of direct excretion of phosphatase by plant roots has been demonstrated, so release of such enzymes can be considered another adaptive response to nutrient stress.