Abstract
The effect of Glomus lamellosum on root colonization, growth, essential oil production and composition and nutrient acquisition of Santolina chamaecyparissus , Salvia officinalis , Lavandula angustifolia , Geranium dissectum , and Origanum dictamnus was investigated. The results showed that mycorrhizal plants had significantly higher growth, essential oil production and nutrient contents compared to non-inoculated plants. The S. officinalis plants showed the highest percentage of colonization, while the S. chamaecyparissus the lowest. Similar percentage of colonization was found among the G. dissectum, L. angustifolia and O. dictamnus plants. Analysis of essential oil by GC and GC/MS showed that the effect of G. lamellosum on the main compounds in leaf essential oils was different on the plant species used. It is concluded that the use of Glomus lamellosum may allow plant growth in low fertility soils, reduce fertilizer inputs and increase aromatic plant production of essential oils, while they indicate that it may be possible to use mycorrhizae to affect the quality of the essential oil produced.
Highlights
Medicinal herbs are known as sources of phytochemicals, or active compounds that are widely sought after worldwide for their natural properties
The objective of this paper is a comparative analysis of the effects induced by the arbuscular mycorrhizal fungus, G. lamellosum on plant growth, nutrient uptake and essential oil production and composition of Santolina chamaecyparissus, Salvia officinalis, L. angustifolia, Geranium dissectum, and O. dictamnus
Plants of Santolina chamaecyparissus, Salvia. officinalis, L. angustifolia, G. dissectum, and O. dictamnus were propagated by stem cuttings rooted in autoclaved perlite in the greenhouse under a misting system
Summary
Medicinal herbs are known as sources of phytochemicals, or active compounds that are widely sought after worldwide for their natural properties. They are useful source of essential oil and have been used for a long time in the perfumery, cosmetic, food and pharmaceutical industry. The arbuscular mycorrhizal symbiosis is recognized for its multiple positive effects on plant growth and for its important contribution towards the maintenance of soil quality. In spite of these benefits to agriculture, at present, the realization of the full potential of this symbiosis has not yet been reached. The understanding of interactions existing among crops, fungal partners and environmental conditions must improve to allow for the efficient management of the mycorrhizal symbiosis through selected agronomic practices and inoculation of cultivated crops (Hamel, 1996)
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