|Author:||Mwale, S. S. ; Azam-Ali, S. N.|
|Book Group Author:||NA|
Two glasshouse experiments were conducted to study root growth and water extraction in three landraces of bambara groundnut under full irrigation and drought. For all landraces, Root Front Velocity (RFV) was about 2.1 cm day-1 between 28 and 42 days after sowing (DAS) and decreased to 1.9 and 1.6 cm day-1 at 48 and 58 DAS, respectively. Drought reduced the Root Length Density (RLD) of all the landraces. RLD in the profile could be categorised into a region of high and uniform RLD in the top half and another region of relatively lower but also approximately uniform RLD in the bottom half. Root:total dry matter ratios reduced from a range of 0.27-0.35 at 42 DAS to 0.14-0.24 at 140 DAS. Water extraction in the irrigated treatments was predominantly within the top 0.5 m of the profile while extraction in the drought treatments went down to 0.9 m. The paper discusses the implications of the root growth characteristics of bambara groundnut with respect to drought tolerance.
|Pages:||187 - 194|
|Journal:||Aspects of Applied Biology|
drought, drought resistance, dry matter accumulation,genotypes, growth, irrigation, landraces, plant water relations, rootsystems, roots, water stress, water uptake, Vigna subterranea, Vigna,Papilionoideae, Fabaceae, Fabales, dicotyledons, angiosperms,Spermatophyta, plants, eukaryotes, drought tolerance, watering, FieldCrops (FF005) (New March 2000), Plant Breeding and Genetics (FF020),Plant Physiology and Biochemistry (FF060), Plant Production (FF100),Environmental Tolerance of Plants (FF900), Soil Water Management(Irrigation and Drainage) (JJ800) (Revised June 2002) [formerly SoilWater Management]