Mitigation the adverse effect of salinity stress on the performance of the tomato crop by exogenous application of chito
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Bulletin of the National Research Centre
Open Access
RESEARCH
Mitigation the adverse effect of salinity stress on the performance of the tomato crop by exogenous application of chitosan Naeem Ullah1, Abdul Basit1, Imran Ahmad1, Izhar Ullah1, Syed Tanveer Shah1, Heba I. Mohamed2* and Shahryar Javed1
Abstract Background: In recent years, ecofriendly compounds such as chitosan has been used to alleviate the destructive effects of salt stress. Chitosan is a natural biodegradable compound with no toxicity in nature and act as a stress tolerance inductor involved in physiological processes and prevent water loss through transpiration. Tomato cv. Rio Grande grown in pots was subjected with salinity stress in the form of 4 levels (0, 50, 100 and 150 mM) whose effect was mediated by treating it with different concentration of chitosan (0, 50, 100 and 150 mg L −1). Results: The data revealed that various application of salinity had a negative effect on almost all the studied parameters. Tomato plants treated with distilled water having no salinity (control) recorded maximum plant height (cm), average number of compound leaves plant−1, leaf area (cm2), stem diameter (mm), number of fruits plant−1, fruit firmness (kg cm−2), leaf chlorophyll content (SPAD), fruit juice pH, yield plant−1 (kg) and minimum total soluble solids (Brix°). Whereas, minimum plant height (cm), average number of compound leaves plant−1, leaf area ( cm2), stem diameter (mm), number of fruits p lant−1, fruit firmness (kg cm−2), leaf chlorophyll content (SPAD), fruit juice pH, yield plant−1 (kg) and maximum total soluble solids (Brix°) were found in plants treated with salinity level of 150 mM. Chitosan concentration of 150 mg L −1 significantly mediated the effect of salinity stress and recorded maximum plant height (cm), average number of compound leaves p lant−1, leaf area ( cm2), stem diameter (mm), number of fruits p lant−1, fruit firm−2 −1 ness (kg cm ), leaf chlorophyll content (SPAD), total soluble solids (Brix°) and yield p lant (kg) with minimum fruit juice pH. Conclusion: It is concluded that foliar application of chitosan at the rate of 150 mg L−1 and salinity stress 150 mM could have positive impact on performance of tomato. Keywords: Abiotic stress, Chitosan, Salinity, Tomato, Quality, Growth Background Salinity has become a severe threat among various abiotic stresses. It has affected around one-third of irrigated land on the earth (Akladious and Mohamed 2018) which negatively affect the performance of plants. Salinity is an extreme stress which limits plant growth (Latif *Correspondence: [email protected] 2 Biological and Geological Sciences Department, Faculty of Education, Ain Shams University, El Makres St. Roxy, Cairo 1575, Egypt Full list of author information is available at the end of the article
and Mohamed 2016). It affects the structure of soil and nutrient availability. It also affects the water and nutrients uptake of the plants (Sofy et al. 2020b). In Pakistan, salinity is known as the main p
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