1College of Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, 434 025, China
2Institute of Root Biology, Yangtze University, Jingzhou, Hubei, 434 025, China
3ICAR-Central Citrus Research Institute, Nagpur, Maharashtra, 440 033, India
*Corresponding author: E-mail: 13972392253@163.com, wuqiangsh@163.com
Online published on 29 August, 2017.
An experiment was conducted to test the potential resistance capacity according to PAL activity and total soluble phenolic, lignin and flavonoid concentration in leaves of Citrus species, viz. Citrus aurantium, C. grandis, C. junos and Poncirus trifoliate during 2016. The results showed that C. aurantium had higher phenylalanine ammonialyase (PAL) activity and total soluble phenolic, lignin and flavoroid concentration in leaves compared with other three species. However, leaf PAL activity and leaf total soluble phenolic and lignin concentration in C. grandis, C. junos and P. trifoliata varied but had no significant difference among three Citrus plants at 5% level. Leaf flavonoid concentration was significantly higher in C. junos than in both C. grandis and P. trifoliata. These results imply that the resistance capacity was potentially ranked as: C. aurantium > C. junos ≥ C. grandis ≥ P. trifoliata.
Resistance, Citrus, PAL, Total soluble phenolic, Lignin, Abiotic stress tolerance, Leaf flavoroid
