Physiology of drought tolerance of arid zone crops. I. Clusterbean and moth bean.

Book Title: NA
Year Published: 2004
Month Published: NA
Author: Garg, B. K.
Book Group Author: NA
Abstract:

Both clusterbean (Cyamopsis tetragonoloba) and moth bean (Vigna aconitifolia) possess different mechanism of drought resistance to survive and produce under drought-prone environments. The development of short duration varieties that enable the crop to escape severe soil moisture deficits is of paramount importance in these legumes. Similarly both these legumes also display several mechanisms of dehydration avoidance to maintain turgor potential for normal metabolic functioning under water deficits. These comprise maximization of water uptake through deep and extensive root systems and reduction of water loss by appropriate shoot attributes and osmotic adjustment for continued photosynthesis and growth at low water potentials. Significant genotypic differences exist for different physiological attributes and drought resistance traits which need to be better understood for selection and development of drought-tolerant genotypes with higher yield potential under water-limited conditions. Improvement in the performance of a crop under water shortage can arise both from genetic changes to the crop that enable it to perform better in drought-prone environments and from agronomic changes that enable the crop to perform better under these constraints. Therefore, good crop management is a requisite for the most efficient use of limited water by these legumes. Various improved cultural practices, optimum plant nutrition and adoption of drought ameliorative measures must be considered to reduce drought injury and to stabilize crop yields under arid environments.

Pages: 13 - 20
URL: http://0-search.ebscohost.com.catalog.library.colostate.edu/login.aspx?direct=true&AuthType=cookie,ip,url,cpid&custid=s4640792&db=lah&AN=20053160399&site=ehost-live
Volume: 28
Number: 1/2
Journal: Current Agriculture
Journal ISO: NA
Organization: NA
Publisher: NA
ISBN: NA
ISSN: 0254-1092
DOI: NA
Keywords:

arid zones, crop management, crop yield, cultivars, drought,drought injury, drought resistance, genetic improvement, geneticvariation, guar, osmoregulation, photosynthesis, plant nutrition, plantwater relations, root systems, turgor, water deficit, water potential,water uptake, water use efficiency, Cyamopsis tetragonoloba, Vignaaconitifolia, Cyamopsis, Papilionoideae, Fabaceae, Fabales,dicotyledons, angiosperms, Spermatophyta, plants, Vigna, Field Crops(FF005) (New March 2000), Plant Breeding and Genetics (FF020), PlantPhysiology and Biochemistry (FF060), Plant Nutrition (FF061), PlantWater Relations (FF062), Plant Production (FF100), EnvironmentalTolerance of Plants (FF900)

Source: EBSCO
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