TY - JOUR
T1 - Phenolic contents and antioxidant potential of Rhododendron species
AU - Upadhyay, Garima
AU - Singh, B. N.
AU - Singh, H. B.
AU - Prakash, Dhan
AU - Kumar, Sandeep
AU - Singh, K. K.
AU - Singh, R. L.
PY - 2005
Y1 - 2005
N2 - In order to assess the antioxidant potential, leaves of 21 species of Rhododendron were studied for their moisture, total phenolic contents (TPC), flavonoids, antioxidant activity (AOA) and free radical scavenging capacity. Out of these, R. baileyii, R. camellieflorum, R. campanulatum, R. cilliatum, R. cinnabarinum, R. griffithianum, R. lepidotum, R. niveum, R. sallignum and R. virgatum were found to have high TPC (91.4-208.9 mg/g GAE), high AOA (73.5-97.2%) and efficient free radical scavengers as evident by their low IC50 (0.07 to 0.19 mg/ml), low EC50 (3.28 to 8.26 mg/mg DPPH), high ARP (antiradical power) (12.10 to 30.48) and high reducing power expressed as ascorbic acid equivalent (ASE/ml) (0.46 to 1.43) as compared to standard quercetin. The promising species were further assayed for their composition of phenolic acids and flavonoids through high performance liquid chromatography. Free radicals can cause damage to cellular bio-molecules leading to several diseases. Rhododendron species with high amounts of phenols, a major group of phytochemicals with antioxidant properties, can help to inactivate them.
AB - In order to assess the antioxidant potential, leaves of 21 species of Rhododendron were studied for their moisture, total phenolic contents (TPC), flavonoids, antioxidant activity (AOA) and free radical scavenging capacity. Out of these, R. baileyii, R. camellieflorum, R. campanulatum, R. cilliatum, R. cinnabarinum, R. griffithianum, R. lepidotum, R. niveum, R. sallignum and R. virgatum were found to have high TPC (91.4-208.9 mg/g GAE), high AOA (73.5-97.2%) and efficient free radical scavengers as evident by their low IC50 (0.07 to 0.19 mg/ml), low EC50 (3.28 to 8.26 mg/mg DPPH), high ARP (antiradical power) (12.10 to 30.48) and high reducing power expressed as ascorbic acid equivalent (ASE/ml) (0.46 to 1.43) as compared to standard quercetin. The promising species were further assayed for their composition of phenolic acids and flavonoids through high performance liquid chromatography. Free radicals can cause damage to cellular bio-molecules leading to several diseases. Rhododendron species with high amounts of phenols, a major group of phytochemicals with antioxidant properties, can help to inactivate them.
KW - Antioxidant activity
KW - Free radical scavengers
KW - Inhibitory concentration
KW - Phenols
KW - Reducing power
KW - Rhododendron
UR - http://www.scopus.com/inward/record.url?scp=33847136722&partnerID=8YFLogxK
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AN - SCOPUS:33847136722
SN - 0970-6399
VL - 18
SP - 35
EP - 38
JO - Indian Journal of Agricultural Biochemistry
JF - Indian Journal of Agricultural Biochemistry
IS - 1
ER -