Impact of Foliar Application of Chitosan Dissolved in Different Organic Acids on Isozymes, Protein Patterns and Physio-Biochemical Characteristics of Tomato Grown under Salinity Stress

Plants

卷:10

Amr S. Mohamed¹  Mahmoud S. Osman²  Mohamed S. Attia²  Hany A. Mahgoub²  Eslam S. Abdelmouty²  Arafat Abdel Hamed Abdel Latef³  Mohamed O. Garada⁴ 

[1] Biotechnology Lab, Horticulture Research Institute, Agricultural Research Center, Giza 12619, Egypt;

[2] Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo 11651, Egypt;

[3] Department of Biology, Turabah University College, Turabah Branch, Taif University, Taif 21974, Saudi Arabia;

[4] Research and Development Department, Smart Land for Agriculture Development Co., Giza, Egypt;

关键词: tomato;    salinity;    antioxidant enzymes;    chitosan;    organic acids;    isozymes;   

DOI  :  10.3390/plants10020388

来源: DOAJ

【 摘 要 】

In this study, the anti-stress capabilities of the foliar application of chitosan, dissolved in four different organic acids (acetic acid, ascorbic acid, citric acid and malic acid) have been investigated on tomato (Solanum lycopersicum L.) plants under salinity stress (100 mM NaCl). Morphological traits, photosynthetic pigments, osmolytes, secondary metabolites, oxidative stress, minerals, antioxidant enzymes activity, isozymes and protein patterns were tested for potential tolerance of tomato plants growing under salinity stress. Salinity stress was caused a reduction in growth parameters, photosynthetic pigments, soluble sugars, soluble proteins and potassium (K⁺) content. However, the contents of proline, ascorbic acid, total phenol, malondialdehyde (MDA), hydrogen peroxide (H₂O₂), sodium (Na⁺) and antioxidant enzyme activity were increased in tomato plants grown under saline conditions. Chitosan treatments in any of the non-stressed plants showed improvements in morphological traits, photosynthetic pigments, osmolytes, total phenol and antioxidant enzymes activity. Besides, the harmful impacts of salinity on tomato plants have also been reduced by lowering MDA, H₂O₂ and Na⁺ levels. Chitosan treatments in either non-stressed or stressed plants showed different responses in number and density of peroxidase (POD), polyphenol oxidase (PPO) and superoxide dismutase (SOD) isozymes. NaCl stress led to the diminishing of protein bands with different molecular weights, while they were produced again in response to chitosan foliar application. These responses were varied according to the type of solvent acid. It could be suggested that foliar application of chitosan, especially that dissolved in ascorbic or citric acid, could be commercially used for the stimulation of tomato plants grown under salinity stress.

【 授权许可】

Unknown