Response of Chinese Carnation Plant, Dianthus chinensis, to Spraying with Putrescine and Roselle Extract in Growth and Flowering Indicators

Abstract

The experiment was carried out in the nursery of University of Kufa during the agricultural season 2021-2022 to study the response of Chinese carnation plant to spraying with putrescine and roselle extract in growth and flowering indicators. Experiment was conducted based on RCBD with three replications. The concentrations of putrescine were 0, 50 and 100 mg l-1 and 0, 2.5 and 5 ml l-1 of roselle extract. The obtained results confirmed that spraying putrescine at a concentration of 100 mg l-1 with roselle extract at a concentration of 2.5 ml l-1 led to a significant increase in plant growth characteristics such as number of branches, the dry weight of the shoot system, the dry weight of the root system, and the content of the leaves in total soluble carbohydrates, and flowering characteristics such as inflorescence length, number of florets, diameter of the floret, the percentage of potassium (K) in the leaves, and the flower content of the anthocyanin pigment, compared to the control treatment.