Roles of phytohormones in regulation of plant immunity against pathogens
Author(s): Ngoc Huu Nguyen, Hai Dang Nguyen and Tuan Nguyen
Abstract: In nature, plants are subjected to multiple pathogens that can be subdivided into biotrophs, necrotrophs and hemibiotrophs. Biotrophic pathogens derive nutrients from living tissues via developing haustoria without disrupting the host plasma membrane. In contrast, necrotrophic pathogens kill the host tissues for nutrient access, using secreted phenolic- and proteic- phytotoxins and many extracellular proteins such as cell-wall degrading enzymes (CWDEs). Intermediary pathogens, called hemibiotrophs, are biotrophs in early infection stages and turn necrotrophs at later stages of infection. To resist to pathogens, arsenal of both constitutive and inducible defenses have been evolved by the host plant. This review focusses mainly on the role of Salicylic acid, Ethylene (ET), Jasmonic acid (JA) and Abscisic acid (ABA) in regulation of plant immunity against different life styles of pathogens.
Ngoc Huu Nguyen, Hai Dang Nguyen, Tuan Nguyen. Roles of phytohormones in regulation of plant immunity against pathogens. South Asian J Agric Sci 2024;4(1):222-226. DOI: 10.22271/27889289.2024.v4.i1c.132