mousavi seyyed mehdi; Heshmat Omidi; seyyed esmaeil mousavi
Abstract
To study of the effect of biological pre-treatments on germination and growth of Fenugreek (Trigonella foenum-graecum L.) seedling under natural salinity stress, a factorial experiment in a completely randomized design was conducted in three replications. Experimental treatments were biological pre-treated ...
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To study of the effect of biological pre-treatments on germination and growth of Fenugreek (Trigonella foenum-graecum L.) seedling under natural salinity stress, a factorial experiment in a completely randomized design was conducted in three replications. Experimental treatments were biological pre-treated at four levels (control, inoculation with Azoto bio-fertilizer, inoculation with Phosphate bio-fertilizer, inoculation with both bio-fertilizers) and natural salinity (salt of Qom Lake) at five levels (zero, 3, 6, 9 and 12 dS/m).The results showed that increasing of salinity levels led to increasing of mean germination time and using of bio-fertilizer treatments and combination treatment caused this index show 22 percentages reduction at highest level of salinity compared to control treatment at same level of salinity. Salinity reduced the germination coefficient and the highest amount of this index (74.3) obtained at 3 dS/m level of salinity that compared to control treatment and at the same level of salinity showed 89 percentages increasing. Salinity reduced total chlorophyll and using of biological treatments caused amount of total chlorophyll at zero level of salinity show 155 percentages increasing compared to control treatment and at the same level of salinity. With increasing of salinity level increased soluble protein and combination treatment increased this index 12 percentages at the highest level of salinity compared to control. Under stress, plants face with oxidative stress and to confront of that use antioxidant enzymes. In this experiment, the using of biological treatments by raising of the production of antioxidant enzymes caused the reduction of salinity effects.
seyyed esmaeil mousavi; Heshmat Omidi
Abstract
To study the effect of biological treatment on germination and growth indices and pigments of flaxseed under salinity stress, a factorial experiment in a completely randomized design was conducted in three replications at the faculty of agriculture of Shahed University in 2018. Experimental treatments ...
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To study the effect of biological treatment on germination and growth indices and pigments of flaxseed under salinity stress, a factorial experiment in a completely randomized design was conducted in three replications at the faculty of agriculture of Shahed University in 2018. Experimental treatments were salinity at four levels (zero, 2.5, 5 and 7.5 dS/m) and biological treatments at four levels (control, bacteria (Baccillus subtilis), fungi (Macrophomina phaseolina) and combination of bacteria and fungi). Effect of biological treatment was significant on germination percentage and the highest germination percentage (99 %) obtained at fungi treatment. Effect of salinity and biological treatment was significant on mean germination time and germination coefficient. The minimum mean germination time (3.79 days) obtained at combination of bacteria and fungi treatment that shows this treatment was most effective in compared with other biological treatments. With increasing of salinity, mean germination time increased. Salinity reduced radicle, plumule and seedling length. The means related to radicle length at the different levels of salinity at biological treatment of fungi was highest amount in compared with other biological treatments. Interaction effect of salinity and biological treatment was significant on chlorophyll a and total chlorophyll. With increasing of salinity, reduced pigments. Maximum amount of chlorophyll a (16.52 µm.ml1-) was obtained at the control treatment of biological treatment and zero salinity. The result of this research showed that using of microorganisms such as fungi and bacteria in salinity stress, can reduce the negative effects of salinity on germination and growth of this plant.
esmaeil mousavi; Heshmat Omidi
Abstract
To study the effect of bio-priming on germination, growth and physiological indices of pumpkin under salinity a factorial experiment in a completely randomized design was conducted in three replications. Experimental treatments were salinity at four levels (zero, 40, 80 and 120 mM) and biological pre-treated ...
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To study the effect of bio-priming on germination, growth and physiological indices of pumpkin under salinity a factorial experiment in a completely randomized design was conducted in three replications. Experimental treatments were salinity at four levels (zero, 40, 80 and 120 mM) and biological pre-treated at eight levels (control, inoculation with Trichoderma harzianum fungi, Azoto bio-fertilizer, phosphate bio-fertilizer, both bio-fertilizer, combination of fungi and azoto bio-fertilizer, combination of fungi and phosphate bio-fertilizer, fungi and both bio-fertilizer). Phosphate biofertilizer threatment had maximum positive effect on percent germination with increasing the salinity. In combination of fungi and phosphate biofertilizer with increasing the salinity levels reduced fewer the germination coefficient. Low levels of salinity had positive effect on growth indices and caused increase that this indices. Maximum seedling length in different levels of salinity obtained in combination of both biofertilizers treatment. Maximum amount of vigor weighted index obtained in fungi treatment and increasing of salinity level caused that reduced this trait. With increasing of salinity level reduced dry weight of seedling and was maximum amount in fungi treatment. The use of microorganisms caused that reduced the negative effect of salinity. With salinity increasing increased the amount of antioxidant enzymes and the use of biopriming treatments more increased the amount of these enzymes in compared to control which show these treatments was effective in reduction of salinity effect by means of increasing the enzymes. Using of microorganisms with more increasing antioxidant enzymes in compared to control caused reduction of negative effect of salinity stress.
