Journal of Plant Physiology & PathologyISSN: 2329-955X

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The role of arbuscular fungi on crop quality


Nasir S A Malik, Alberto Nunez, Lindsay and L Rogers

USDA-ARS, USA

: J Plant Physiol Pathol

Abstract


It is well known that mycorrhizal symbiosis can improve plant growth and productivity under limited supply of phosphorus, water, or other nutrients. We have started studies to investigate if the mycorrhizal symbiosis would also affect food quality by changing the levels of polyphenols/flavonoid in different plant species. In addition, we are examining changes in polyphenol levels of a cultivar when inoculated with different species a plant. Using UHPLC/UV-MS, our initial studies, with leeks have identified eight species of kaempferol glycosides in the leek shoots. In addition to different numbers of hexose residues attached to kaempferol, we also identified hexuronic acid, malonyl, feruloyl, coumaroyl moiets attached to agylcone. Of these flavonoids, five occurred in significantly higher amounts in mycorrhizal plants compared to control. The levels of two flavonoid species were found lower, and one unchanged in mycorrhizal plants compared to controls. It was interesting to note that some of these flavonoid glycosides increased substantially even in the presence of full nutrient supply under which condition there was no overall increase in plant growth of the mycorrhizal plants compared to controls. Thus, indicating the direct involvement of mycorrhizae in plant secondary metabolism changes in polyphenol levels due to different species of fungi and different cultivars is being investigated.

Biography


Email: Nasir.Malik@ARS.USDA.GOV

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