Red light-induced disease resistance in watermelon plants against root-knot nematode Meloidogyne incognita
ZHAO Renzong
DENG Yun
ZHU Yingchun
SUN Dexi
LIU Junpu
Abstract：This study was conducted to research efficiency of red light to induce systemic resistance in watermelon plants against Meloidogyne incognita,two watermelon seedlings with different resistance (Susceptible material ' Zhongke No.1',resistant material 'Hongzigua') were exposed to red light in night after inoculation of nematodes,their root knot index,growth and resistance-related enzyme activity and other indicators were measured.The results showed that after the red light treatment,the root knot index of two watermelon materials significantly decreased compared with the control,plant height,shoot fresh weight,root fresh weight were significantly increased to the normal plant level.The phenylalanine ammonia-lyase (PAL) and peroxidase (POD) activities of the two materials increased significantly compared with the control and the activity of superoxide dismutase (SOD) decreased significantly.But the amplitude of PAL,POD and SOD of 'Hongzigua'activity was higher than that of 'Zhongke No.1',polyphenol oxidase(PPO) activities has no significant change.The results showed that the red light treatment at night could induce watermelon resistance to Meloidogyne incognita,suggesting that nighttime red light treatment might be a potential method to control watermelon infestation by nematodes,especially for plant cultivation.
Keywords：WatermelonRed lightMeloidogyne incognitaInduced resistance
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 8-13 )