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Plant disease resistance is the ability of a plant to prevent and terminate infections from plant pathogens. Structures that help plants prevent pathogens from entering are the cuticular layer, cell walls, and stomata guard cells.
Most pathogens instead exhibit a high degree of host-specificity. Non-host plant species are often said to express non-host resistance. The term host resistance is used when a pathogen species can be pathogenic on the host species but certain strains of that plant species resist certain strains of the pathogen species. The causes of host ...
Hypersensitive response (HR) is a mechanism used by plants to prevent the spread of infection by microbial pathogens.HR is characterized by the rapid death of cells in the local region surrounding an infection and it serves to restrict the growth and spread of pathogens to other parts of the plant.
Systemic acquired resistance (SAR) is a "whole-plant" resistance response that occurs following an earlier localized exposure to a pathogen. SAR is analogous to the innate immune system found in animals, and although there are many shared aspects between the two systems, it is thought to be a result of convergent evolution. [ 1 ]
Rhizobia has been found to increase legume resistance to insect herbivores, particularly when several species of rhizobia are present. [12] Legume inoculation has been an agricultural practice for many years and has continuously improved over time. [10] 12–20 million hectares of soybeans are inoculated annually. An ideal inoculant includes ...
Endophytes may be transmitted either vertically (directly from parent to offspring) or horizontally (among individuals). [4] Vertically transmitted fungal endophytes are typically considered clonal and transmit via fungal hyphae penetrating the embryo within the host's seeds, while reproduction of the fungi through asexual conidia or sexual spores leads to horizontal transmission, where ...
Induced systemic resistance (ISR) is a resistance mechanism in plants that is activated by infection. Its mode of action does not depend on direct killing or inhibition of the invading pathogen , but rather on increasing physical or chemical barrier of the host plant. [ 1 ]
Rhizophagus irregularis (previously known as Glomus intraradices [3] [4]) is an arbuscular mycorrhizal fungus used as a soil inoculant in agriculture and horticulture. Rhizophagus irregularis is also commonly used in scientific studies of the effects of arbuscular mycorrhizal fungi on plant and soil improvement.