GROWTH AND ESSENTIAL OIL QUANTITY OF POT MARIGOLD CALENDULA OFFICINALIS IN RESPONSE TO FOLIAR APPLICATION OF MORINGA EXTRACT AND PINK-PIGMENTED FACULTATIVE METHYLOTROPHIC BACTERIA METHYLOBACTERIUM POPULI

Document Type : Original Article

Authors

1 Faculty of Environmental Studies and Research, , Ain Shams University, Egypt, Cairo

2 Faculty of Agriculture, Ain Shams University, Egypt

3 Horticulture Research Institute, Agriculture Research Center, Egypt

4 Medicinal and Aromatic Plants Research Department, National Research Centre, Egypt

Abstract

The use of bio stimulants for promoting plant growth like bacteria and plant extracts has great potential to provide economical and sustainable solutions to current agricultural practices and challenges. Two consecutive field trials in 2019 and 2020 were conducted to investigate the effect of foliar spraying with moringa extract and pink-pigmented methylotrophic bacteria on growth and the essential oil content of Calendula officinalis plant. Four concentrations of moringa extract (1, 2, 4 and 6 %) and four concentrations of pink-pigmented methylotrophic bacteria (0.5, 1, 2. and 3 %) were used. All moringa and pink-pigmented methylotrophic bacteria treatments positively impacted growth characteristics, i.e., plant height, number of leaves and essential oil content in both studied two seasons. Plants sprayed with 2% moringa extract produced the tallest plant and number of leaves meanwhile, plants treated with 4% moringa extract exhibited a significant increase in essential oil contents (ml/plant). A similar trend was observed when plants were treated with 2% pink-pigmented methylotrophic bacteria, and it is suggested that these concentrations be used.
Key words: Moringa extract, Growth, Essential oil, Pink-Pigmented Methylotrophic Bacteria, Calendula officinalis, pot marigold.

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