R. Ostadian Bidgoly; H.R. Balouchi; E. Soltani; A. Moradi
Abstract
There is a little information about the effects of temperature and water potential on safflower. In order to study the effects of temperature and water potential on seed germination characteristics of safflower (Carthamus tinctorius L.), an experiment as combined analysis was conducted base on a completely ...
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There is a little information about the effects of temperature and water potential on safflower. In order to study the effects of temperature and water potential on seed germination characteristics of safflower (Carthamus tinctorius L.), an experiment as combined analysis was conducted base on a completely randomized design with 4 replications by 25 seeds in laboratory of seed technology at Yasouj University in 2015. The factors included temperature (5, 10, 15, 20, 25, 30, 35, 40 and 45 oC) and water potential (0, -0.2, -0.4, -0.6, -0.8, -1, -1.2, -1.4 and -1.6 MPa). The percentage and rate of germination, root length, shoot length, ratio of root length to shoot length and seedling vigor index were measured in this experiment. The results of analysis of variance showed that main effects of temperature and water potential and interactions were significant on all indicators of germination at 1% probability level. Also, by decreased water potential, germination percentage and germination rate reduced. At 5 oC and at zero potential germination percentage was 98% while the potential of -1.6 MPa germination percentage dropped to zero. At 35 oC and at zero potential germination percentage was 95% while the using potential of -1.6 MPa germination percentage decreased to 1%. By increasing the temperature up to 20oC increasing germination percentage and germination rate detected and afterwards reduced.
S. Baladi; H.R. Balouchi; A. Moradi; M. Movahhedi Dehnavi
Volume 5, Issue 1 , March 2015, , Pages 107-122
Abstract
Storage conditions, especially high moisture storage and high temperature environments, greatly affect the quality of oil seeds. In order to investigate the effect of temperature, seed moisture content and storage time on the deterioration of flax seed oil a factorial experiment was conducted based on ...
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Storage conditions, especially high moisture storage and high temperature environments, greatly affect the quality of oil seeds. In order to investigate the effect of temperature, seed moisture content and storage time on the deterioration of flax seed oil a factorial experiment was conducted based on a completely randomized design with four replications in the seed lab of Yasouj University. The factors included the temperature at four levels (15, 25, 35 and 45 °C), moisture content in 5 levels (initial moisture content, 5, 9, 13 and 17%) and six storage times (30, 60, 90, 120, 150 and 180 days). The results showed that germination and normal seedlings percentage, germination rate and vigor index reduced with increasing moisture content and during storage at each temperature level and with a combination of high temperature and moisture content this reduction was more severe. The lowest level of deterioration was in 5 °C with 5% moisture content that after 180 days storage, viability was reduced from 93 to 90 percent. Over time and with increasing moisture content, electrical conductivity also increased, and this increase was greater at high temperatures and seed lots with high electrical conductivity had low viability
