Hadi asadpour; Saeid Hazrati; Amir reza Sadeghi-Bakhtvari; Bahman Pasban Eslam
Abstract
Arbuscular mycorrhiza fungi (AMF) reduce the effects of drought stress by altering some root properties and absorbing nutrients and water in plants. In order to evaluate the effect of AMF on some characteristics of spring safflower (Carthamus tinctorius L.-cv. Sofeh) under water-deficit condition, this ...
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Arbuscular mycorrhiza fungi (AMF) reduce the effects of drought stress by altering some root properties and absorbing nutrients and water in plants. In order to evaluate the effect of AMF on some characteristics of spring safflower (Carthamus tinctorius L.-cv. Sofeh) under water-deficit condition, this experiment has been carried out at research farm of the Azarbaijan Shahid Madani University, Tabriz in 2018. The experiment is done as a split plot in a completely randomized blocks design with three replications. The results show that the highest petal yield under non-water stress is 281.6 kg/ha and the lowest stress from flowering stage to 197.3 kg/ha. In the control, the highest content of seed oil is 30.65% related to the seed inoculated with AMF. The highest oil yield is obtained from the condition without stress with 1098.9 kg/ha, also in seed inoculated with fungus of 1107.8 kg/ha. The highest seed yield (4884.4 kg/ha) is obtained in the condition without water stress and inoculation of seeds and soil with AMF. In general, water stress leads to reduced yield and inoculation with AMF, especially inoculation of seeds and soil, yield of plants under water stress due to the positive effect on growth improve nutrition and water uptake. Plants inoculated with AMF display improved growth, yield and oil content under water stress conditions than non-inoculated plants.
Saeid Hazrati; Amir Reza Sadeghi-Bakhtvari; Davood Kiani
Abstract
The present study aims at evaluating the effects of leaf foliar of growth regulators and nitrogen on growth parameters and yield of spring safflower. To do so it has carried out a research at East Azerbaijan Agricultural Research Center as a factorial experiment based on RCBD (Randomized Complete Block ...
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The present study aims at evaluating the effects of leaf foliar of growth regulators and nitrogen on growth parameters and yield of spring safflower. To do so it has carried out a research at East Azerbaijan Agricultural Research Center as a factorial experiment based on RCBD (Randomized Complete Block Design) with three replications. The factors include growth regulators in four levels, namely auxin, cytokinin, auxin + cytokinin (wherein the treatment’s concentration has been 1000 mg/L), and control (no use of growth regulator, whatsoever), foliar application of nitrogen (3 and 6 per thousand), and two springcultivars (Soffe and Goldasht). Results show taller plants (17%) and greater number of heads per plant (39%), seeds per head (9%), and lateral stems (37%) for Soffeh cultivar, compared to Goldasht variety. On the other hand, Goldasht cultivar provides the maximum head diameter (15%) and 1000 seed weight (47%), in comparison to Soffeh cultivar. The maximum grain yield is observed for Soffeh cultivar with auxin growth regulator and a concentration of three per thousand foliar application of nitrogen (3205 kg ha -1),displaying no significant difference from either the control or the application of three per thousand foliar of nitrogen (3120 kg ha-1). The application of growth regulators has changed the fatty acid composition. The application of auxin + cytokinin as the growth regulator with a concentration of three and six per thousand foliar of nitrogen increase the oleic, palmitic, and linolenic acids. However, the use of auxin and cytokinin separately increase linoleic and stearic acids among the fatty acids, compared to the control, which is higher in Soffeh cultivar than Goldasht. In general, Soffeh cultivar shows higher growth and yield, compared to Goldasht cultivar, indicating the positive effect in foliar application of hormones and nitrogen for the latter.