Response of Prunus species to graft-inoculation by two Iranian strains of almond witches’-broom phytoplasma

Kabiri, Hamidreza; Siampour, Majid; Babaei, Ghobad

doi:10.1007/s42161-022-01230-y

Cited by 1 publication

(2 citation statements)

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“…With the impact of drought, water stress, or salinity stress, almond trees infected with phytoplasmas might exhibit more severe symptoms. Therefore, the disease agent should be under observation due to possible transmission via insect vectors (Alloush et al., 2023) and grafting materials (Kabiri et al., 2022) and we have to tackle complex stress issues in the future to obtain profitable yield from almond trees.…”

Section: Discussionmentioning

confidence: 99%

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Molecular characterization of ‘Candidatus Phytoplasma phoenicium’ infecting almond (Prunus dulcis) and evaluation of biochemical defenses produced in the plants

Akkurak,

Güldür,

Dikilitas

et al. 2024

Journal of Phytopathology

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Increasing incidences of phytoplasma infestations in Almond trees warrants the better management approach to prevent yield losses. Disease management rely on identification of the pathogen based on molecular profiling. The present study aimed, to identify the phytoplasma agent in almond trees and to measure the biochemical responses it causes in the host. Direct and Nested PCRs performed using phytoplasma specific primer pairs 16S rRNA, detected the presence of phytoplasma agent in symptomatic trees but not in symptomless trees. Phylogeny based on the sequence analysis revealed that the infecting agent was closely related to ‘Candidatus Phytoplasma phoenicium’ (16SrIX‐B subgroup). Then the study was carried out to determine the responses of physiological and biochemical mechanisms in almond trees infected with phytoplasma. Total chlorophyll and protein contents of infected almond trees were lower compared to healthy control, on the other hand, the levels of catalase and peroxidase activity increased in infected trees. Higher levels of stress‐related metabolites such as proline (20.53–39.23 μmol/g), phenol (3.00–4.44 mg GAE/g), salicylic (94.96–138.22 ng SA/mg protein) and jasmonic acid (965.86–1465.10 ng JA/mg protein) were observed in infected trees compared to asymptomatic trees, respectively in healthy and infected trees. The results showed that the Ca. P. phoenicium, which was detected for the first time in Türkiye, was able to change the physiological and biochemical mechanisms. The pathogenic agent could possess a potential danger in almond production areas. It is crucially important that this agent should be considered in certification programs.

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Section: Discussionmentioning

confidence: 99%

“…Therefore, the disease agent should be under observation due to possible transmission via insect vectors (Alloush et al, 2023) and grafting materials (Kabiri et al, 2022) and we have to tackle complex stress issues in the future to obtain profitable yield from almond trees. All authors edited the manuscript to bring in the final shape.…”

Section: Con Clus Ionsmentioning

confidence: 99%