Reza Tavakkol afshari; REZA SADRABADI HAGHIGHI
Abstract
In this research, biological characteristics of Balangu seed in response to temperature were evaluated. Germination responses and cardinal temperatures were evaluated using dent-like, segmented, beta and quadratic regression models and regression coefficients (a and b), correlation of determinant (R2), ...
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In this research, biological characteristics of Balangu seed in response to temperature were evaluated. Germination responses and cardinal temperatures were evaluated using dent-like, segmented, beta and quadratic regression models and regression coefficients (a and b), correlation of determinant (R2), correlation coefficient (r), and significant level functions of predicted values versus observed ones were used to find the appropriate models. The results showed that the germination of Balangu is possible at a range of 5 to 25 °C. The highest germination percentage was detected at 20°C (98.5%). Moreover, at 20°C temperature the highest seedling growth and less time to shoot emergence (60.03 mm and 58 h respectively) was detected. Segmented model was superior compared to other models, therefore, this model is recommended for quantifying biological parameters and seedling emergence of Balangu. Temperatures of 1°C, 22.6°C and 30°C were the cardinal temperatures for seed germination (minimum, optimum and maximum, respectively). According to the results of this research, Balangu is the psychrophile plants and appropriate temperature germination is 20°C to 22.6°C. In this research, a proposed equation entitled of "Germination Value (GV)" for the simultaneous evaluation of seed germination and seedling growth per unit of time was introduced.
M.Sh. Daneshmandi; R. Tavakkol Afshari; R. Sadrabadi Haghighi
Abstract
In this study the identification of chemical and biochemical characteristics of balangu seed oil (Lallemanthia royleana) and their parameters were investigated under accelerated aging conditions at 24 h, 48 h and 72 h at 41°C and 100% RH in a completely randomized design. The results showed that ...
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In this study the identification of chemical and biochemical characteristics of balangu seed oil (Lallemanthia royleana) and their parameters were investigated under accelerated aging conditions at 24 h, 48 h and 72 h at 41°C and 100% RH in a completely randomized design. The results showed that balangu seed oil content was 19.26%.Fatty acid profiles were 90.71% of unsaturated fatty acids (USFA) and 9.29% of saturated fatty acids (SFA), also the linolenic acid (C18:3), oleic acid (C18:1) and palmitic acid (C16:0) were important of PUSFA, MUSFA and SFA oil seeds, respectively.The antioxidants of oil seeds include 427.8 ppm tocopherols and 210 ml.l-1 of polyphenols. The results showed that 15.2% reduction in oil seed under accelerated aging treatment, also this treatments was the cause of increase of SFA compared to USFA. The oxidation and peroxide production peak was between control and 24 h of accelerated aging treatment. Oil resistance (rancimat) in the 72 h of aging treatment was 1.5 times less than to the control. The germination value (GV) was 1.6, 2.5 and 4.5 higher than the accelerated aging treatments, respectively. In general, it is likely that the changes of chemical and biochemical characteristics of seed oil is happened by oxidative enzymes and this condition is quicker in deteriorated balangu seeds
