Whole-Genome Mapping of Date Palm (Phoenix Dactylifera L.)

Iqbal, Zafar; Sattar, Muhammad Naeem; Al–Khayri, Jameel M.

doi:10.1007/978-3-030-73746-7_8

Cited by 2 publications

(1 citation statement)

References 57 publications

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“…The date palm, Phoenix dactylifera L., is one of the most cultivated fruit trees in arid and semi-arid regions, due to its high ability to produce under harsh conditions of high temperatures and salinity with the scarcity of water resources. It also has an important social, economic, and nutritional value [1,2]. Iraq is one of the main countries known for its cultivation of palm trees and its production of dates since ancient times, and this was found embodied in the ruins of Babylon, where the palm trees were a symbol of pride and wealth [3,4].…”

Section: Introductionmentioning

confidence: 99%

First molecular record of Thielaviopsis punctulata, the causative agent of black scorch blight disease on date palms in Iraq

Hantoosh,

Hussein

2023

IOP Conf. Ser.: Earth Environ. Sci.

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A laboratory study was conducted on samples of palm trees collected from Diyala Governorate, Iraq. The results of isolation and diagnosis of the samples that showed symptoms of black blight infection indicated that the fungus that causes the disease is Thielaviopsis punctulata. This is the first record of T. punctulata as a causative agent of black blight in Iraq. Moreover, the results of the microscopic examination showed that the fungus forms endoconidia from Phialidic conidiophores, and also produces aleoroconidia, thickened-walled chlamydial spores. In addition, the results of testing the pathogenic ability of the isolates on date palm seedlings showed that all the isolates of the pathogenic fungus showed the ability to cause the disease, but with different percentages compared to the percentage of the disease, where it was 0 in the comparison treatment that was free of pathogenic fungus, and isolate GP2 excelled, as it gave an infection severity of 100%, followed by the two isolates GP0 and GP1, which gave an infection severity of 93.33 and 80%, respectively.

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Section: Introductionmentioning

confidence: 99%

First molecular record of Thielaviopsis punctulata, the causative agent of black scorch blight disease on date palms in Iraq

Hantoosh,

Hussein

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Characterization and Control of Thielaviopsis punctulata on Date Palm in Saudi Arabia

Alhudaib

El-Ganainy

Almaghasla

et al. 2022

Plants

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Date palm (Phoenix dactylifera L.) is the most important edible fruit crop in Saudi Arabia. Date palm cultivation and productivity are severely affected by various fungal diseases in date palm-producing countries. In recent years, black scorch disease has emerged as a devastating disease affecting date palm cultivation in the Arabian Peninsula. In the current survey, leaves and root samples were collected from deteriorated date palm trees showing variable symptoms of neck bending, leaf drying, tissue necrosis, wilting, and mortality of the entire tree in the Al-Ahsa region of Saudi Arabia. During microscopic examination, the fungus isolates growing on potato dextrose agar (PDA) media produced thick-walled chlamydospores and endoconidia. The morphological characterization confirmed the presence of Thielaviopsis punctulata in the date palm plant samples as the potential agent of black scorch disease. The results were further confirmed by polymerase chain reaction (PCR), sequencing, and phylogenetic dendrograms of partial regions of the ITS, TEF1-α, and β-tubulin genes. The nucleotide sequence comparison showed that the T. punctulata isolates were 99.9–100% identical to each other and to the T. punctulata isolate identified from Iraq-infecting date palm trees. The pathogenicity of the three selected T. punctulata isolates was also confirmed on date palm plants of Khalas cultivar. The morphological, molecular, and pathogenicity results confirmed that T. punctulata causes black scorch disease in symptomatic date palm plants in Saudi Arabia. Furthermore, seven commercially available fungicides were also tested for their potential efficacy to control black scorch disease. The in vitro application of the three fungicides Aliette, Score, and Tachigazole reduced the fungal growth zone by 86–100%, respectively, whereas the in vivo studies determined that the fungicides Aliette and Score significantly impeded the mycelial progression of T. punctulata with 40% and 73% efficiency, respectively. These fungicides can be used in integrated disease management (IDM) strategies to curb black scorch disease.

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Whole-Genome Mapping of Date Palm (Phoenix Dactylifera L.)

Cited by 2 publications

References 57 publications

First molecular record of Thielaviopsis punctulata, the causative agent of black scorch blight disease on date palms in Iraq

First molecular record of Thielaviopsis punctulata, the causative agent of black scorch blight disease on date palms in Iraq

Characterization and Control of Thielaviopsis punctulata on Date Palm in Saudi Arabia

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