Document Type : Research Paper

Authors

1 College of Agriculture and Natural Resources, Department of Agronomy and Plant Breeding, University of Mohaghegh Ardabili, Ardabil, Iran

2 Department of Animal Sciences, University of Mohaghegh Ardabili, Ardabil, Iran

3 Department of Agronomy and Plant Breeding. Faculty of Agriculture and Natural Resources. University of Mohaghegh Ardabili. Ardebil. Iran

Abstract

In order to study the effect of methanol and seed inoculation with plant growth promoting rhizobacteria on grain filling components, chlorophyll content and grain yield of safflower (Carthamus tinctorius L.) under various irrigation levels, a factorial experiment was conducted based on randomized complete block design with three replications at the research farm of University of Mohaghegh Ardabili in 2020. The experimental factors were included irrigation (full irrigation as control, irrigation withholding at 50% heading-bud and flowering stages), biofertilizers application (no application as control, seed inoculation with Flavobacterium, Pseudomonas and both application of Flavobacterium and Pseudomonas), methanol foliar application: (foliar application with water as control and foliar application 10 and 20% volume of methanol). The results showed that chlorophyll content a (41.57%), b (74.59%) and total chlorophyll (49.33%), grain filling period and effective grain filling period (27.32 and 72.89% respectively) and grain yield (69.2%) increased under full irrigation condition, foliar application 20% volume of methanol and both application of Flavobacterium with Pseudomonas in comparison with irrigation withholding at 50% heading-bud and no application of biofertilizers and methanol. It seems that application of plant growth-promoting bacteria and methanol can increase grain yield of safflower due to improving chlorophyll content and grain filling components under water limitation condition.

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