The effects of boron on improving aluminium tolerance in coriander (Coriandrum sativum L.)

In this study، the role of boron (BO33-) on improving tolerance of coriander plant (Coriandrum sativum L.) subjected to different concentrations of aluminum (Al3+) was evaluated. In this regard، an experiment was implemented with seven different concentrations of aluminum including: 0. 25، 0. 50، 1. 00، 2. 00، 3. 00 and 4. 00 mg/L Al3+ and three concentrations of boron including: 0. 25، 0. 5 and 0. 75 mg/L BO33- with the control treatment. The experiment was concluded based on completely randomized design with three replications. Seeds of coriander were germinated in germinator and seedlings were grown in Hogland´s solution with different boron and aluminium concentrations. Results showed that different levels of Al3+، decreased dry weight، leaf area، length of shoot and root، amount of chlorophyll and aluminium، while proline concentration and Al3+accumulation increased. Nearly، in all concentrations of Al3+، plant height، dry weight and chlorophyll content promoted with increasing boron concentrations، but proline concentration was decreased. It could be concluded that application of boron along with Al3+، might have proved plant growth and neutralized effects of Al toxicity.