Inheritance Study Of Aluminum Tolerance In Sorghum In Nutrient Culture
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| Author | : Candido Ricardo Bastos |
| Publisher | : |
| Total Pages | : 80 |
| Release | : 1982 |
| Genre | : Sorghum |
| ISBN | : |
Four sorghum (Sorghum bicolor L. Moench) restores lines, five of their F1 hybrids, and F2 and F3 populations were evaluated for tolerance to the toxic effects of aluminium in nutrient solution. Gene action and inheritance of the tolerance factors were also studied. A rapid screening-selection techniques using three-day-old seedlings transferred from a germinator into the nutrient solution was employed. A modified Steinburg nutrient solution was amintained at ph 4 andamended with 6 ppmno Al 0.75 ppm of P. Primary root lengths were measured at the beginning and conclusion of a 6-day treatment period. Net root growth and relative root length (growth during treatment as a percentage of the control without Al) were used as parameters to assess Al toxicity.A total of 708 F2 seedlings of each population plus 60 seedlings of each parent at 6 ppm of Al, and 102 F2 seedlings of each population plus 60 seedlings of each parent at 0 ppm Al were observed. Segregates in the upper 10% of the distribution were selected form easch population, planted in a greenhouse, and F3 seeds were produced. All F2 frequency distribution showed a normal distribution for both characters, indicating that Al tolerance is probably a quantitative trait. Transgressive segregation was found in F2 population of most of the crosses in one or both directions, indicating that genetic variability of the parental lines was due differnt gene(s). A lack of dominance and a tendency for partial dominance for sensitivity to Al toxicity for the (...).
| Author | : Lynn M. Gourley |
| Publisher | : CIAT |
| Total Pages | : 340 |
| Release | : 1987 |
| Genre | : Acid soils |
| ISBN | : 8489206643 |
Soil in the tropics, classification and characteristics; phosphorus availability in the acid soils of tropical America; analysis methodologyfor tropical soils; strategies implied in the use and management of acid soils in Tropical America; a new methodology to select cultivars tolerant to aluminium and with high yield potential; calcium and root penetration in highly weathered soils; sorghum evaluation in the Llanos of Venezuela; potential role of grains sorghum in the agricultural systems of regions with acid soils in tropical latin america; effective screening techniques for tolerance to aluminium toxicity; tolerance to aluminium toxicity in upland rice for acid soils; breeding methodologyfor phosphorus efficiency and tolerance to aluminium and manganesetoxicities for beans (Phaseolus vulgaris L.); world sorghum germplasm collection and conservation; prospects for sorghum improvement for phosphorus efficiency; evaluation of mineral elements in sorghum grown onacid tropical soils; breeding aluminum-tolerant sorghums; finding and utilizing exotic al-tolerant sorghum germplasm.
| Author | : Jonathan Shaw |
| Publisher | : CRC Press |
| Total Pages | : 372 |
| Release | : 1989-12-21 |
| Genre | : Science |
| ISBN | : 9780849368523 |
This volume provides a synthesis of recent work on evolutionary aspects of metal tolerance in plants. It presents contributions from scientists with a wide diversity of expertise. It covers the evolution of heavy metal tolerance in groups of plants, fungi, and protists. The book discusses the physiological, genetic and molecular aspects of metal tolerances. It deals with the evolution of populations in metal-contaminated environments. Several chapters include tolerance in animals in order to place the rest of the book on plants in proper perspective. This publication is an exciting addition for scientists with both applied and basic interest in metal toxicity and tolerance. It is of importance to those in vegetation ecology, land reclamation, agronomy, physiology, population ecology, ecological genetics, evolutionary biology and molecular biology.
| Author | : C. Wayne Smith |
| Publisher | : John Wiley & Sons |
| Total Pages | : 864 |
| Release | : 2000-12-25 |
| Genre | : Technology & Engineering |
| ISBN | : 9780471242376 |
The newest addition to the Wiley Series in Crop Science, this book is an all-in-one guide to sorghum, one of the eight major grain crops grown worldwide. While presenting information in adequate detail for scientists, it is also an invaluable reference for growers, processors, and grain merchants.
| Author | : S. Ann Rogers |
| Publisher | : |
| Total Pages | : 122 |
| Release | : 1986 |
| Genre | : Plants |
| ISBN | : |
| Author | : W.H. Gabelman |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 599 |
| Release | : 2012-12-06 |
| Genre | : Science |
| ISBN | : 9400935811 |
This volume presents the proceedings of the Second International Sym posium on Genetic Aspects ofPlant Minerai Nutrition, held in Madison, Wisconsin in 1985. The mechanisms by which plants acquire, transport and utilize essential minerai nutrients are highly complex. The means by which plants either exclude or tolerate ions of metals toxic to plants are equally complex. The first symposium attempted to convene research scientists con cerned with minerai nutrition for the purpose of exploring the kinds of minerai nutrition phenomena identified as being under genetic contro!. The first symposium also placed much emphasis on research to which genetic intervention might be applied. At the second symposium more papers were presented on genetic and breeding research, a long-term objective of the first symposium. The second symposium also included biotic interactions under genetic con trol that either enhanced or impeded ion uptake, e.g. mycorrhizae and nitrogen fixing bacteria. This continuing dialogue is essential for a research area the complexity of which is due to its interdisciplinary nature.
| Author | : Guillermo Munoz-Arguedas |
| Publisher | : |
| Total Pages | : 250 |
| Release | : 1988 |
| Genre | : Plants |
| ISBN | : |
| Author | : Jurandir Vieira Magalhaes |
| Publisher | : |
| Total Pages | : 422 |
| Release | : 2002 |
| Genre | : |
| ISBN | : |
Aluminum (Al) toxicity is one of the major constraints for agriculture on acid soils, which occupy large regions of the word's agricultural area. At the low pH values associated with these soils (pH 4 -5). Al+3 is solubilized into the soil solution and is toxic to plants, dramatically inhibiting root growth and crop yield. Plant breeding approaches have been used to develop Al tolerant crop genotypes for over 50 years. In order to further improve crop Al tolerance, researchers are now investigating the molecular and physiological mechanisms underlying crop Al tolerance, with the ultimate goal of isolating major Al tolerance genes. Sorghum is an important cereal crop species that exhibits extraordinary levels of tolerance to abiotic stresses such as Al toxicity and drought. Yet, almost nothing is known about the genetics and physiology of sorghum Al tolerance, hence this was the focus of the thesis research described here. A detailed molecular genetic characterization of the mechanisms of Al tolerance in sorghum was conducted in two sources of sorghum Al tolerance, SC283 and SC566. SC283 was found to harbor a single major Al tolerance gene (Alt sb), which exhibited partial dominance in this study. Alt sb was subsequently mapped to a chromosomal location that was apparently not conserved in relation to the location of known Al tolerance genes in wheat and barley. Additional studies indicated that Al tolerance in SC566 is also controlled by the Alt sb gene. The results are discussed with regards to the possible conservation of Al tolerance genes across species in the Poaceae. The physiological studies of Al tolerance were performed with Al tolerant (ATF10B) and sensitive (ATF8B) near isogenic lines derived from SC283. These studies suggested that Alt sb encodes a tolerance mechanism that acts by excluding Al from sensitive sites in the root tip via and Al-activated root citrate exudation. Al tolerance in ATF10B appears to be inducible by Al, in that Al tolerance increased as the roots were exposed to Al for longer time periods. The thesis is concluded with a description of future research that will focus on the isolation of Alt sb by positional cloning.
| Author | : N. El Bassam |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 523 |
| Release | : 2012-12-06 |
| Genre | : Science |
| ISBN | : 9400920539 |
Proceedings of the Third International Symposium on Genetic Aspects of Plant Mineral Nutrition, June 19-24 June, 1988, Braunschweig, Germany
| Author | : R Duncan |
| Publisher | : Academic Press |
| Total Pages | : 589 |
| Release | : 2012-12-02 |
| Genre | : Science |
| ISBN | : 0323145167 |
Crops as Enhancers of Nutrient Use examines the various plant and soil factors that contribute to nutrient use efficiency of plants. It attempts to address policies regarding Low Input Sustainable Agriculture (LISA), conservation-oriented cropping systems, and reductions in environmental contaminants. It also presents longer-term remedies to some of the inherent problems of high volume applications of expensive fertilizer nutrients. This book emphasizes plant-soil interaction, particularly, nutritional interactions involving rhizosphere, microbes, and stress on the root system. Stress factors include moisture and low and high pH. The book also covers the genetic and physiological response of plant to nutrients at the cellular level, on a whole-plant basis, and when subjected to stress. This book will contribute to the development of a more cost-effective and judicious nutrient usage of major crops.
