A5008555730- Plant Parasitism and Resistance
- Plant Molecular Biology Research
- Plant and animal studies
- Photosynthetic Processes and Mechanisms
- Plant responses to water stress
- Plant Growth Enhancement Techniques
- Allelopathy and phytotoxic interactions
- Biocrusts and Microbial Ecology
- Mesoporous Materials and Catalysis
- Polymer-Based Agricultural Enhancements
- Plant Genetic and Mutation Studies
- Catalytic Processes in Materials Science
- Plant Physiology and Cultivation Studies
- Seed Germination and Physiology
- Nematode management and characterization studies
- Soybean genetics and cultivation
- Legume Nitrogen Fixing Symbiosis
King Abdullah University of Science and Technology
2021-2025
Cairo University
2023
The University of Tokyo
2023
King Abdulaziz University
2023
University of Science and Technology
2023
Korea University of Science and Technology
2023
Abscisic acid (ABA) is an important carotenoid-derived phytohormone that plays essential roles in plant response to biotic and abiotic stresses as well various physiological developmental processes. In Arabidopsis, ABA biosynthesis starts with the epoxidation of zeaxanthin by DEFICIENT 1 (ABA1) enzyme, leading epoxycarotenoids; e.g., violaxanthin. The oxidative cleavage 9-cis-epoxycarotenoids, a key regulatory step catalyzed 9-CIS-EPOXYCAROTENOID DIOXYGENASE, forms xanthoxin, which converted...
Strigolactones (SLs) are a plant hormone inhibiting shoot branching/tillering and rhizospheric, chemical signal that triggers seed germination of the noxious root parasitic Striga mediates symbiosis with beneficial arbuscular mycorrhizal fungi. Identifying specific roles canonical noncanonical SLs, two SL subfamilies, is important for developing Striga-resistant cereals engineering architecture. Here, we report rice mutants lacking SLs do not show phenotypes known SL-deficient plants,...
The obligate hemiparasite Striga hermonthica is one of the major global biotic threats to agriculture in sub-Saharan Africa, causing severe yield losses cereals. germination seeds relies on host-released signaling molecules, mainly strigolactones (SLs). This dependency opens up possibility deploying SL analogs as "suicidal agents" reduce accumulated seed bank infested soils. Although several synthetic have been developed for this purpose, utility these compounds realizing suicidal strategy...
Strigolactones (SLs) regulate many developmental processes, including shoot-branching/tillering, and mediate rhizospheric interactions. SLs originate from carlactone (CL) are structurally diverse, divided into a canonical noncanonical subfamily. Rice contains two SLs, 4-deoxyorobanchol (4DO) orobanchol (Oro), which common in different plant species. The cytochrome P450 OsMAX1-900 forms 4DO CL through repeated oxygenation ring closure, while the homologous enzyme OsMAX1-1400 hydroxylates Oro....
SUMMARY Seeds of the root parasitic plant Striga hermonthica undergo a conditioning process under humid and warm environments before germinating in response to host‐released stimulants, particularly strigolactones (SLs). The hormone abscisic acid (ABA) regulates different growth developmental processes, stress response; however, its role during seed germination early interactions with host plants is under‐investigated. Here, we show that ABA inhibited hindering biosynthesis induced...
Striga hermonthica, a member of the Orobanchaceae family, is an obligate root parasite staple cereal crops, which poses tremendous threat to food security, contributing malnutrition and poverty in many African countries. Depleting seed reservoirs from infested soils one crucial approaches minimize subterranean damage crops. The dependency germination on host-released strigolactones (SLs) has prompted development "Suicidal Germination" strategy reduce accumulated bank Striga. success...
Seed germination is a critical and challenging process in the propagation of Oryza coarctata, wild halophytic rice species. This protocol outlines seed procedure for O. coarctata. All steps required optimal seedling establishment coarctata both sterile soil-based systems are described detail. Additionally, includes an analysis primary hormones, abscisic acid (ABA) gibberellin (GA), involved regulating dormancy germination. Key features • provides detailed instructions germinating improving...
Sustainable and precise fortification practices are necessary to ensure food security for the increasing human population. Precision agriculture aims minimize use of fertilizers pesticides by developing smart materials real-life agricultural practices. Here, we show that biomimetic mineralization can be efficiently employed encapsulate controllably release plant biostimulants (MiZax-3) improve quality yield capsicum (Capsicum annum) crops in field experiments. ZIF-8 encapsulation MiZax-3...
Abstract The plant hormones strigolactones (SLs) regulate shoot branching and mediate the communication with symbiotic mycorrhizal fungi, but also noxious root parasitic weeds, such as Striga spp. SLs derive from carlactone (CL) are divided structurally into canonical non-canonical SLs. However, questions about particular biological functions of two groups identification SL that inhibits still unanswered, hampering targeted modification pattern towards improving architecture resistance...
Abstract Carotenoid cleavage, catalyzed by CAROTENOID CLEAVAGE DIOXYGENASEs (CCDs), provides signaling molecules and precursors of plant hormones. Recently, we showed that zaxinone, a apocarotenoid metabolite formed the CCD ZAXINONE SYNTHASE (ZAS), is growth regulator required for normal rice (Oryza sativa) development. The genome encodes three OsZAS homologs, called here OsZAS1b, OsZAS1c, OsZAS2, with unknown functions. Here, investigated enzymatic activity, expression pattern, subcellular...
Abstract The witchweed Striga hermonthica , an obligate and noxious root–parasitic plant, remains a persistent threat to cereal production poses great challenge smallholder farmers in Sub‐Saharan Africa. Inducing suicidal germination of seeds by applying strigolactone analogs is promising strategy deplete the seed bank infested soils. Nevertheless, there need increase efficiency improve applicability this strategy, which may be achieved testing further stimulants. Herein, we explored...
Abstract The rice Zaxinone Synthase (ZAS) gene encodes a carotenoid cleavage dioxygenase (CCD) that forms the apocarotenoid growth regulator zaxinone in vitro. Here, we generated and characterized constitutive ZAS ‐overexpressing lines, to better understand role determining content regulating architecture. overexpression enhanced endogenous level, promoted root increased number of productive tillers, leading about 30% higher grain yield per plant. Hormone analysis revealed decrease...
The yield of pearl millet, a resilient cereal crop crucial for African food security, is severely impacted by the root parasitic weed Striga hermonthica, which requires host-released hormones, called strigolactones (SLs), seed germination. Herein, we identify four SLs present in Striga-susceptible line SOSAT-C88-P10 (P10) but absent resistant 29Aw (Aw). We generate chromosome-scale genome assemblies, including gapless chromosomes each line. Striga-resistant Aw lacks 0.7 Mb segment containing...
Summary Carotenoid‐derived regulatory metabolites and hormones are generally known to arise through the oxidative cleavage of a single double bond in carotenoid backbone, which yields mono‐carbonyl products called apocarotenoids. However, extended conjugated system these pigments predestines them also repeated forming dialdehyde products, diapocarotenoids, have been less investigated due their instability low abundance. Recently, we reported on short diapocarotenoid anchorene as an...
Societal Impact Statement Striga is a parasitic plant that greatly limits the production of Africa's most staple cereals, including sorghum. Infection occurs when parasite germinates in response to biomolecules emitted into soil from host's roots. Some sorghum genotypes harbor mutation makes them ineffective stimulating seed germination. This resistance great importance because its possible application management. Here, additional resistant with varying levels are discussed context their...
Strigolactones (SLs) are a plant hormone regulating different processes in development and adjusting plant's architecture to nutrition availability. Moreover, SLs released by plants communicate with beneficial fungi the rhizosphere where they are, however, abused as chemical cues inducing seed germination of root parasitic weeds, e.g. Striga spp., guiding them towards host their vicinity. Based on structure, divided into canonical non-canonical SLs. In this perspective, we describe...
Global food security is a critical concern that needs practical solutions to feed the expanding human population. A promising approach employment of biostimulants increase crop production. Biostimulants include compounds boost plant growth. Recently, mimics zaxinone (MiZax) were shown have growth-promoting effect in rice (Oryza sativa). In this study, we investigated MiZax on growth and yield three dicot horticultural plants, namely, tomato (Solanum lycopersicum), capsicum (Capsicum annuum),...
Climate changes and the rapid expanding human population have become critical concerns for global food security. One of promising solutions is employment plant growth regulators (PGRs) increasing crop yield overcoming adverse conditions, such as desert climate. Recently, apocarotenoid zaxinone its two mimics (MiZax3 MiZax5) shown a growth-promoting activity in cereals vegetable crops under greenhouse field conditions. Herein, we further investigated effect MiZax3 MiZax5, at different...
Abstract Strigolactones (SLs) regulate many developmental processes, including shoot-branching/tillering, and mediate rhizospheric interactions. SLs are structurally diverse, divided into a canonical non-canonical sub-family. To better understand the biological function of particular SLs, we generated CRISPR/Cas9 mutants disrupted in OsMAX1-1400 or OsMAX1-1900 , which encode cytochrome P450 enzymes (CYP711A clade) contributing to SL diversity. The disruption did neither affect pattern nor...
The apocarotenoid zaxinone is a recently discovered regulatory metabolite required for proper rice growth and development. In addition, its two mimics (MiZax3 MiZax5) were shown to have remarkable growth-promoting activity on crops capability reduce infestation by the root parasitic plant Striga through decreasing strigolactone (SL) production, suggesting their potential application in agriculture horticulture. present study, we developed new series of MiZax via structural modification...
Abstract The yield of pearl millet, a resilient cereal crop crucial for African food security, is severely impacted by the root parasitic weed Striga hermonthica, which requires host-released strigolactones (SLs) seed germination. Herein, we identified four SLs present in Striga-susceptible line SOSAT-C88-P10 (P10), but absent resistant 29Aw (Aw). We generated chromosome-scale genome assemblies including gapless chromosomes each line. found Striga-resistant Aw lacks 0.7 Mb segment containing...
Abstract Crystalline ZIF‐8 ( C ‐ZIF‐8 ) and amorphous Am were prepared investigated to control the germination of Striga hermonthica , a root parasitic plant, which threatens cereal crops production particularly in sub‐Saharan Africa. We have demonstrated that shows better performance than inhibiting seeds germination. This efficient materials can be attributed incomplete deprotonation 2 methylimidazole (2MIM) during amorphization, leading presence unsaturated Zn−N coordination with...
Abstract Climate changes and the rapid expanding human population have become critical concerns for global food security. One of promising solutions is employment plant growth regulators (PGRs) increasing crop yield overcoming adverse conditions, such as desert climate. Recently, apocarotenoid zaxinone its two mimics (MiZax3 MiZax5) shown a growth-promoting activity in cereals vegetable crops under greenhouse field conditions. Herein, we further investigated effect MiZax3 MiZax5, at...