Morphological and physiological attributes associated to drought tolerance of Ethiopian durum wheat genotypes under water deficit condition
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2011, Vol 1, Issue 2
Abstract
The experiment was conducted to assess the differential morpho-physiological response to stimulated water deficit and to determine the relationship between some of these morphological and physiological traits and yield components of eighteen durum wheat genotypes grown in pots under lathhouse condition. Water deficit significantly affected gas exchange and chlorophyll fluorescence parameters. It reduced the net photosynthesis rate (Pn), transpiration rate (E) and stomatal conductance (gs) measured both at anthesis and grain-filling stages. Similarly, the value of initial fluorescence (Fo) was increased while variable fluorescence (Fv), maximum fluorescence (Fm) and optimum quantum yield fluorescence (Fv/Fm) were decreased under water deficit. RWC of the leaves was decreased by 36.7% while SLA increased by 12.6% due to moisture stress relative to the well-watered control. No significant correlations were found between chlorophyll fluorescence parameters and grain yield under water deficit condition. Similarly, no significant correlations were found between leaf gas exchange parameters and grain yield. On the other hand, peduncle length and excursion were positively correlated with grain yield while negatively correlated with drought susceptibility index under water deficit condition. Leaf posture and rolling had also a profound effect on grain yield and other attributes. Erectleaved genotypes had more grain yield, HI, kernel numbers per spikelet and grain-filling rate but had lower kernel weight than droopy leaved. Similarly, genotypes exhibited strong leaf rolling under water deficit condition had more grain yield, kernel numbers per spike and water use efficiency. The genetic variability found for leaf posture, leaf rolling, peduncle length and excursion among the Ethiopian durum wheat genotypes suggests the opportunity for selection superior and adapted genotype in water-limited environments. These can be achieved by integrating these morphological traits as indirect selection in conjunction with other yield components.
Authors and Affiliations
Ashinie Bogale, Kindie Tesfaye, Tilahun Geleto
Keywords
Related Articles
- EP ID EP37175
- DOI -
- Views 339
- Downloads 0
A Study on the biodiversity of snake island in south andaman
Snake Island is an uninhabited small rocky islet off Carbyn’s Cove in Port Blair, Andaman. The biodiversity of this rocky island is its distinctive feature as it becomes a small habitat for various organisms close to th...
Indirect speciation of Cr (VI) and Cr (III) in water and food samples using newly synthesized amberlite XAD-7 functionalized resin
The availability of good quality water is essential for avoiding diseases and improving the quality of life. The increase in both industrial activities and human population has adversely affected several aspects of the e...
Evaluating the potential impact of Agdarband coal mining on water quality, NE Iran
The evaluation of geochemical composition of coal mine drainage in Agdarband shows that the concentration of some elements (especially iron and aluminum) in the surface water is more than the standard. The evaluations...
The use of indigenous plant species for drinking water treatment in developing countries: a review
Although universal access to safe and piped water is an important long-term solution, it is very expensive and challenging to implement in developing countries in the short term. Hence, improving both physicochemical an...
Prevalence of Hepatitis B virus, Hepatitis C virus and HIV in blood donors of different areas of Khyber Pukhtoonkhwa, Pakistan
It is common to donate blood to save lives of critical patients the carefully transfusion of blood and screening of blood donors is essential to test the blood for the purpose to stop the spreading of the infectious agen...