Genetic control of phosphorus uptake and utilization efficiency in maize and sorghum under marginal soil conditions

• Main Authors: Schaffert, R.E, Alves, V.M.C, Parentoni, S.N. (Embrapa Milho e Sorgo, Sete Lagoas, MG (Brazil)), Raghothama, K.G. (Purdue University, Indiana (USA))
• Format: Book
• Language: English
• Published: Mexico, DF (Mexico) CIMMYT 2000
• Subjects: ABSORCION DE SUSTANCIAS NUTRITIVAS; ABSORPTION DE SUBSTANCES NUTRITIVES; AMELIORATION DES PLANTES; CEREALE; CEREALES; CEREALS; CLASIFICACION DE SUELOS; CLASSIFICATION DES SOLS; CONTROL GENETICO; FITOMEJORAMIENTO; FOSFORO; GENETIC CONTROL; GENETICA MOLECULAR; GENETIQUE MOLECULAIRE; LUTTE GENETIQUE; MOLECULAR GENETICS; NUTRIENT UPTAKE; PHOSPHORE; PHOSPHORUS; PLANT BREEDING; PROJET DE RECHERCHE; PROYECTOS DE INVESTIGACION; RENDEMENT; RENDIMIENTO; RESEARCH PROJECTS; SOIL CLASSIFICATION; SORGHUM; YIELDS; ZEA MAYS
• ISBN: 9789706480521; 9706480528

Production constraints are more intense on acid soils, which cover 30percent of the worlds land area. Toxic levels of Al associated with low availability and high fixation of P frequently occur in acid soils. Both Al toxicity and low P availability effect root development and interact with moisture stress in plant development, further complicating the negative effect of drought. Genetic resources tolerant to Al toxicity and more efficient in P uptake can reduce some of the negative effects of moisture stress in these marginal soils. This paper describes the effects Al toxicity and P stress on plant development and some plant responses to overcome these stresses. The identification of genes responsible for positive responses to these stresses and the stacking of these genes in improved cultivars can improve the productivity and/or reduce input requirements, making production more sustainable.