Vol. 6, Issue 4 (2018)
Systemic acquired resistance (SAR): A novel strategy for plant protection with reference to mulberry
Author(s): M Younus Wani, S Mehraj, RA Rather, S Rani, OA Hajam, NA Ganie, MR Mir, MF Baqual, and Afifa S Kamili
Abstract: Exclusive reliance on pesticides, fungicides and herbicides resulted in pesticide and herbicide, resistance, pest resurgence, residues, environmental pollution. Plants have developed various resistance mechanisms to help them adapt to pathogen and insect attack. Systemic acquired resistance (SAR) is a form of induced resistance that is activated throughout a plant after being exposed to elicitors from virulent, avirulent, or nonpathogenic microbes, or artificial chemical stimuli such as chitosan or salicylic acid (SA) (Gozzo and Faoro, 2013). It is a mechanism of induced defense that confers long-lasting protection against a broad spectrum of microorganisms. SAR requires the signal molecule salicylic acid (SA) and is associated with accumulation of pathogenesis-related proteins, which contribute resistance to the plants. They can be used as fungicide alternative without any threat of developing resistance and being safe and ecofriendly (Najar et al, 2010). The elicitor, β-Amino butyric acid induces greater systemic resistance to mulberry in addition to enhancement in biochemical parameters and NPK contents of mulberry leaves (Mazal, 2014). Therefore, in order to control the diseases of mulberry without adverse effect on environment, humans and silkworm’s health attention needs to be given to promote SAR chemicals. A model needs to be framed to promote the use of these chemicals in order to make sericulture more profitable. This is an ecofriendly approach of disease and pest management. The chitinase genes of mulberry induced by insect wounding and fungal infection, suggesting that these chitinases help the mulberry plant to cope with the challenges from insects and fungi (Wang et al., 2015). Jasmonic acid (JA) is an important plant defense signal mediating resistance to herbivores. Presently disease control is largely depending on the use of fungicides, bactericides and insecticides. The hazardous nature of these chemicals on the environment, human health and silkworm strongly necessitates the search for new, harmless means of disease control. Induced resistance like SAR can diminish the use of toxic chemicals for disease control and thus could be proposed as an alternative, non-biocidal, ecologically-friendly approach for plant protection and hence for sustainable Sericulture. Induced resistance is increased expression of Natural defense mechanisms against different pathogens provoked by external factors of various types. Systemic acquired resistance (SAR) is a "whole-plant" resistance response and can be distinguished from other disease resistant responses by both the spectrum of pathogen protection and the associated changes with gene expression.
Pages: 1184-1192 | 555 Views 90 Downloads
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How to cite this article:
M Younus Wani, S Mehraj, RA Rather, S Rani, OA Hajam, NA Ganie, MR Mir, MF Baqual,, Afifa S Kamili. Systemic acquired resistance (SAR): A novel strategy for plant protection with reference to mulberry. Int J Chem Stud 2018;6(4):1184-1192.
