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Judul: The Performance of Morphological And Physiological Effect of Three Accessions of Cowpea on Drought Stress
Penulis: Helen Hetharie  || email:
Jurnal: Prosiding FMIPA 2016 Vol. 1 no. 1 - hal. 222-230 Tahun 2016  [ Prosiding ]
Keywords:  Drought, cowpea, morphological characters, vegetative.
Abstract: The objectives of this research was to study the response of cowpea to drought through the performance of morphological characters that in turn affected plant physiological, as well as to get stress-tolerant accessions. The pot eperiment in the greenhouse used a Split Plots in a Completely Randomized Design. The main plots were the levels of drought, consisting of K0 = watering at equivalent to precipitation = 130 mm per month, K1 = 100 mm per month, and K2 = 70 mm per month; and the subplot was three accessions of cowpea, consisting of KTm16, KTm23, and a superion varieties KT6. The experiment had 3 replications. Observations on several morphological characters were done at 2, 4 and 6 weeks after planting. Data were presented in the forms of figures, and an analysis of variance was conducted on the data of growth of 6 weeks after planting, continued with Duncan difference test. The analysis results indicated the drought stress hindered plant growth at 4 weeks after planting, which became clearer at the age of 6 weeks. Results of the analysis of variance showed highly significant differences in the main plot and subplot in all growth characters, and highly significant interaction effect on the number of green leaves. Difference test results showed that the drought level K2 suppressed the growth of plant height, stem node number, branch number, total leaf number and green leaf, as compared to those of K1 and K0. The reduced growth of those characters at K2 drought level were respectively 11.9%, 20.2%, 39.1%, 33.6%, and 40.1% compared K0. Comparison of accessions showed that KTm23 gave the highest values on all vegetative variables; KTm16 showed moderate growth and higher green leaf number than KTm23; KT6 showed low growth characteristics. The interaction effects showed that local accessions especially KTm6, were more tolerant to stress level of K2 based on the number of green leaves.
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