Enhancement in Bell Pepper (Capsicum annuum L.) Plants with Application of Roholtiella sp. (Nostocales) under Soilless Cultivation

Cyanobacteria are found to be renewable and sustainable additives for growth improvement in crops. Extracts biomass of three nitrogen-fixing cyanobacteria namely, Roholtiella sp. (QUCCCM97), Nostoc ellipsosporum (QUCCCM99), Desmonostoc danxiaense (QUCCCM112) isolated from Qatar desert environment were tested their ability enhance the bell pepper (Capsicum annuum L.) seedlings. Soilless cultivation experiments carried out by applying aqueous extract separately. Seedlings transplanted Hoagland’s solution under regulated conditions. In total, 2, 4, 6 mL L?1 microalgae as well 1 2 mg biomasses (as biofertilizer) added Hoagland solution. An assessment seedling parameters such shoot length, root fresh weight, dry spad index, number leaves per plant, rate was performed. However, among different doses concentrations investigated QUCCCM97, 99, 112, our findings revealed that length (cm), weight (g), positively affected significantly increased at maximum dose/concentration compared control plants. With leaves, 17.5%, 40.3%, 26.0%, 21.6%, 22.8%, respectively, control. Additionally, with QUCCCM99, same 12.3%, 25.3%, 15.1%, 9.3%, 51.8%, respectively. While presence QUCCCM112, they 8.7%, 30.1%, 15.6%, 5.4%, 48.6%, Our results demonstrated extracts strains here, particularly (Nostocales), have an enhancement potential could used modern agriculture productivity soilless system ensure sustainability.