Bioactive compounds and antioxidant capacities in the flavedo tissue of two citrus cultivars under low temperature

Abstract

Antioxidants production is amongst the physiological responses of plants to protect their tissues from oxidative damages caused by chilling and freezing stresses. Indeed, cold tolerance of plants is related to production of reactive oxygen species (ROS) scavengers to combat oxidative stress. In this study, two citrus cultivars including Citrus sinensis 'Siavaraz' and Citrus limon 'Lisbon' grown at the north of Iran were examined to compare antioxidants changes including total flavonoid, total phenol and total antioxidant capacities (TAC) in the flavedo tissue of the fruits under various low temperature treatments of control (15 ºC), 3, 0, -3 and -6 ºC. The results indicated that total flavonoid content and TAC in Citrus limon 'Lisbon' was significantly higher than in Citrus sinensis 'Siavaraz'. During the treatments, both cultivars showed a significant increase in the flavonoid content. Meanwhile, total phenol content significantly increased from 15 to -6 ºC in Citrus limon 'Lisbon' and from 15 to 0 ºC in Citrus sinensis 'Siavaraz'. These results suggest that the biosynthesis of phenolics and flavonoids in flavedo of citrus fruit in response to low temperature might be correlated with environmental adaptation rather than antioxidant response.

Spectroscopic Determination of Total Phenol and Flavonoid Contents of Citrus Limon Peel From North Eastern Region of India

“…Citrus is the general term for plants belonging to the family Rutaceae 2 . Citrus fruits and derived products have beneficial impacts on the human health 3 . Hence, citrus fruits have attracted much attention because of its nutritional and antioxidant properties.…”

“…Anthelmintic activity Citrus limon fruit empty juice sacs was investigated from Nagpur region of Maharashtra 6 . Comparative study of antioxidants changes including total flavonoid, total phenol and total antioxidant capacity of Citrus limon fruits grown at the north of Iran were examined 3 . Determination of phenolic contents and total antioxidant activity of citrus lemon juice and peel extracts was reported from Bosnia and Herzegovina 7 .Yield, fruit quality, economic feasibility and water productivity of citrus limon plants were evaluated 8 .…”

Citrus limon L Burmf leaves from North Eastern India : A source of Amino acids

“…Anthelmintic activity Citrus limon were investigated 2,3,4 . Comparative study of antioxidants changes including total flavonoid, total phenol and total antioxidant capacity of Citrus limon fruits grown at the north of Iran were examined 5 . Antimicrobial activity of juice in ripens and unripe forms of Citrus limon were studied 6 .…”

Discrimination of citrus fruits using FT-IR fingerprinting by quantitative prediction of bioactive compounds

“…Additionally, flavonoid compounds have activities that are similar to carotenoids [2]. However, studies of citrus cultivars and fruit development have revealed that the contents differed for carotenoids [3,4], flavonoid [5,6], phenolic compounds [5][6][7][8], and ascorbic acid [6]. Further, the flavonoid and phenolic contents were affected by environmental conditions [5].…”