Evaluation of Dolichos Bean [Lablab purpureus (L.) Sweet] Genotypes against Aluminium Toxicity
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Date
2017-07-25
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College of Horticulture and Forestry, Central Agricultural University, Pasighat
Abstract
The present investigation was carried out in the year 2016-2017 in naturally ventilated polyhouse of Vegetable Experimental Farm, Department of Vegetable Science, College of Horticulture and Forestry, Central Agricultural University, Pasighat, Arunachal Pradesh. The experiment was laid out in Factorial Completely Randomized Design with 2 factors (twenty dolichos bean genotypes with four aluminium (Al) level i.e. 0, 15, 30, 45 ppm) and three replications. Individual main effect and their interaction effects were studied for vine length at weekly interval (2nd -4th), morpho-physiological characters (biomass, root length, root tolerance index, root dry matter, shoot dry matter, leaf dry matter, total dry matter, uptake of P and Al), quality parameters (total protein, proline and total chlorophyll), parameters of soil (pH, EC, available P and extractable Al) at 4th week after sowing whereas yield parameters (pod weight, pod length, pod width, no of seed per pod and yield) at harvesting.
In the present study, genotypes of dolichos bean exhibited significant differences for all characters. Aluminium treatment also expressed significant differences for all characters. However, interaction effect was found significant for all studied characters except vine length at all stages.
Vine length at weekly interval, biomass, root length, root dry matter, shoot dry matter, leaf dry matter, total dry matter, uptake of phosphorus reduced significantly due to Al treatment except Al uptake. There was significant increase in total protein and proline content of plants at 4th week due to Al treatment, whereas significant reduction in chlorophyll content was observed. In soil parameters, pH and available P decreased with Al treatment, while EC and extractable Al increased significantly with respect to control. All the yield parameters were significantly reduced due to Al treatment. At lower concentration (15 ppm) there was no significant effect on vine length and yield parameters whereas morpho-physiological, soil and quality parameters were significantly affected. At higher concentrations (30 and 45 ppm) all the parameters were significantly influenced.
From the present study it can be concluded that G1, G2, G4, G5, G10 and G16 are tolerant based on morpho-physiological characteristic and root tolerance index. Genotypes G1, G2, G4, G11 and G18 were found superior for yield characteristics whereas, G4 and G5 were superior for quality parameters.
Overall genotypes G1 (Pusa Sem 3), G2 (VRSEM-207), G4 (VRSEM-601) were found tolerant to aluminium toxicity as well as high yielding.
Description
The present investigation was carried out in the year 2016-2017 in naturally ventilated polyhouse of Vegetable Experimental Farm, Department of Vegetable Science, College of Horticulture and Forestry, Central Agricultural University, Pasighat, Arunachal Pradesh. The experiment was laid out in Factorial Completely Randomized Design with 2 factors (twenty dolichos bean genotypes with four aluminium (Al) level i.e. 0, 15, 30, 45 ppm) and three replications. Individual main effect and their interaction effects were studied for vine length at weekly interval (2nd -4th), morpho-physiological characters (biomass, root length, root tolerance index, root dry matter, shoot dry matter, leaf dry matter, total dry matter, uptake of P and Al), quality parameters (total protein, proline and total chlorophyll), parameters of soil (pH, EC, available P and extractable Al) at 4th week after sowing whereas yield parameters (pod weight, pod length, pod width, no of seed per pod and yield) at harvesting.
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