The effect of Jamonic acid and Methyl jasmonate on resistance induce of pistachio seedlings to Phytophthora crown and root rot

Subject Areas :

Fatemeh Hasanzadeh Davarani ^{1 *} , Mahmood Akhoondi ² , Amir Mohammadi ³

1 - Department of Plant Pathology,Rafsanjan Branch,Islamic Azad Univversity,Rafsanjan,Iran
2 - department of plant pathology, Rafsanjan, Islamic Azad university, Iran
3 - Horticultural Science Research Institute, Pistachio Research Center, Agricultural Research, Education and Extension Organization (AREEO), Rafsanjan, Iran

Received: 2024-07-19 Accepted : 2024-08-03 Published : 2024-02-20

Keywords: jasmine acid, phytophthora root-rot, pistachio, Enzyme,

Abstract :

One of the most important diseases of pistachio trees is rootand crown rot caused by various species of phytophthora,which annually eliminates the number of fertile and non-fertile trees. Host resistance considered as the mostsustainable management methods of of this pathogen. The purpose of this study was to investigate the effect of jasmonic acid (JA) on phytophthora root-rot of pistachio . In this research,the Badami-rizZarandcultivar were used for planting. Then one- monthseedlings with concentrations of 25, 50, 75 and 100 mg of jasmonic acid on kg soil were infected and Then Phytophthora drechsleri (pd) was induced on the root of seedlings. In this study, the activity of Catalase, Peroxidase and Phenylalanine ammonia-lyase enzymes was measured. Results showed high JA concentration increased the activity of catalase enzyme (CAT) in comparison control whereas increasingis only at a concentration of 100 mg JA per kg of soil with a significant difference at 1% level. Also,At level a 1% increase in the concentration of jasmonic acid caused a significant increase in Guaiacolperoxidaseenzyme compared to control. Furthermore, increasing JA concentration the specific activity of Phenylalanine ammonia-lyaseenzyme was significantly increased in comparison the control. Therefore, the stimulant of jasmonic acid increases the enzymes of resistance . it is possible to use them in the biological control of soil pathogens to avoid excessive consumption of fungicides, resistance to fungicides and environmental degradation.

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