Publications by authors named "Hassan Ghareeb"

Genome comparison between the maize pathogens and revealed a large diversity region (19-1) containing nearly 30 effector gene candidates, whose deletion severely hampers virulence of both fungi. Dissection of the gene cluster resulted in the identification of one major contributor to virulence, (; ). Quantitative reverse-transcriptase polymerase chain reaction (qRT-PCR) experiments revealed high expression of during biotrophic growth of .

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The phytohormones salicylic acid (SA), jasmonic acid (JA), and ethylene (ET) are central regulators of biotic and abiotic stress responses in . Here, we generated modular fluorescent protein-based reporter lines termed COLORFUL-PR1pro, -VSP2pro, and -PDF1.2apro.

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Subdiffraction super-resolution fluorescence microscopy, or nanoscopy, has seen remarkable developments in the last two decades. Yet, for the visualization of plant cells, nanoscopy is still rarely used. In this study, we established RESOLFT nanoscopy on living green plant tissue.

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Powdery mildew is a fungal disease that affects a wide range of plants and reduces crop yield worldwide. As obligate biotrophs, powdery mildew fungi manipulate living host cells to suppress defence responses and to obtain nutrients. Members of the plant order Brassicales produce indole glucosinolates that effectively protect them from attack by non-adapted fungi.

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Transformed hairy root culture in common buckwheat ( Moench Rubra cultivar) was investigated for accumulation of amino acids and specific flavonoids. Leaves and stems of were used a starting material for induction of hairy roots via the A4 strain. The transformed lines were confirmed by PCR detection of gene, and their capability to continuously form hairy roots.

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The biotrophic maize head smut fungus Sporisorium reilianum is a close relative of the tumour-inducing maize smut fungus Ustilago maydis with a distinct disease aetiology. Maize infection with S. reilianum occurs at the seedling stage, but spores first form in inflorescences after a long endophytic growth phase.

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To detect potential pathogens, plants perceive the fungal polysaccharide chitin through receptor complexes containing lysin motif receptor-like kinases (LysM-RLKs). To investigate the ligand-induced spatial dynamics of chitin receptor components, we studied the subcellular behaviour of two Arabidopsis thaliana LysM-RLKs involved in chitin signalling, CHITIN ELICITOR RECEPTOR KINASE1 (CERK1) and LYSIN MOTIF-CONTAINING RECEPTOR-LIKE KINASE5. We performed standard and quantitative confocal laser scanning microscopy on stably transformed A.

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Article Synopsis
  • The study tested the effects of chitosan, methyl jasmonate, and salicylic acid on the accumulation of silymarin and phenolic compounds in Milk thistle cultures, using various concentrations of these metabolite elicitors.
  • Increased concentrations of the elicitors significantly boosted the total silymarin content, particularly enhancing the accumulation of silybine A&B, which were absent in untreated callus cultures.
  • Hairy root cultures demonstrated superior production of phenolic compounds and antioxidant capacities compared to non-transformed and chemically treated cultures, suggesting they are effective for enhancing economically valuable metabolites.
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Advancing basic and applied plant research requires the continuous innovative development of the available technology toolbox. Essential components of this toolbox are methods that simplify the assembly, delivery, and expression of multiple transgenes of interest. To allow simultaneous and directional multigene assembly on the same plant transformation vector, several strategies based on overlapping sequences or restriction enzymes have recently been developed.

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The biotrophic fungus Sporisorium reilianum causes head smut of maize (Zea mays) after systemic plant colonization. Symptoms include the formation of multiple female inflorescences at subapical nodes of the stalk because of loss of apical dominance. By deletion analysis of cluster 19-1, the largest genomic divergence cluster in S.

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Sporisorium reilianum is a biotrophic maize (Zea mays) pathogen of increasing economic importance. Symptoms become obvious at flowering time, when the fungus causes spore formation and phyllody in the inflorescences. To understand how S.

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Biotrophic pathogens, such as the related maize pathogenic fungi Ustilago maydis and Sporisorium reilianum, establish an intimate relationship with their hosts by secreting protein effectors. Because secreted effectors interacting with plant proteins should rapidly evolve, we identified variable genomic regions by sequencing the genome of S. reilianum and comparing it with the U.

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