Hafiz Nazar Faried1, Chaudhary Muhammad Ayyub2, Muhammad Amjad2, Rashid Ahmed3, Fahad Masoud Wattoo4, Madiha Butt5, Mohsin Bashir2, Muhammad Rashid Shaheen6, Muhammad Ahmed Waqas3. 1. Department of Horticulture, Faculty of Agriculture, Muhammad Nawaz Sharif University of Agriculture, Multan, Pakistan. 2. Institute of Horticultural Sciences, Faculty of Agriculture, University of Agriculture, Faisalabad, Pakistan. 3. Department of Agronomy, Faculty of Agriculture, University of Agriculture, Faisalabad, Pakistan. 4. Department of Plant Breeding and Genetics, Faculty of Agriculture, University of ARID Agriculture, Rawalpindi, Pakistan. 5. Department of Horticulture, Faculty of Agriculture, Ghazi University, Dera Ghazi Khan, Pakistan. 6. Department of Horticulture, University College of Agriculture and Environmental Sciences, Islamia University of Bahawalpur, Pakistan.
Abstract
BACKGROUND: Potato is an important vegetable; however, salt stress drastically affects its growth and yield. A pot experiment was therefore conducted to assess salicylic acid efficacy in improving performance of potato cultivars, grown under salt stress (50 mmol L-1 ). Salicylic acid at 0.5 mmol L-1 was sprayed on to potato plants after 1 week of salinity application. RESULTS: Salt stress effects were ameliorated by salicylic acid effectively in both the studied cultivars. N-Y LARA proved more responsive to salicylic acid application than 720-110 NARC, which confirmed genetic variation between cultivars. Salicylic acid scavenged reactive oxygen species by improving antioxidant enzyme activities (superoxide dismutase, catalase, peroxidases) and regulating osmotic adjustment (proline, phenolic contents), which led to enhanced water relation and gaseous exchange attributes, and thereby increased potassium availability and reduced sodium content in potato leaves. Moreover, potato tuber yield showed a positive correlation with potassium content, photosynthesis and antioxidant enzyme activities. CONCLUSION: Salt tolerance efficacy of salicylic acid is authenticated in improving potato crop performance under salt stress. Salicylic acid effect was more pronounced in N-Y LARA, reflecting greater tolerance than 720-110 NARC, which was confirmed as a susceptible cultivar. Hence salicylic acid at 0.5 mmol L-1 and cultivation of N-Y LARA may be recommended in saline soil.
BACKGROUND:Potato is an important vegetable; however, salt stress drastically affects its growth and yield. A pot experiment was therefore conducted to assess salicylic acid efficacy in improving performance of potato cultivars, grown under salt stress (50 mmol L-1 ). Salicylic acid at 0.5 mmol L-1 was sprayed on to potato plants after 1 week of salinity application. RESULTS:Salt stress effects were ameliorated by salicylic acid effectively in both the studied cultivars. N-Y LARA proved more responsive to salicylic acid application than 720-110 NARC, which confirmed genetic variation between cultivars. Salicylic acid scavenged reactive oxygen species by improving antioxidant enzyme activities (superoxide dismutase, catalase, peroxidases) and regulating osmotic adjustment (proline, phenolic contents), which led to enhanced water relation and gaseous exchange attributes, and thereby increased potassium availability and reduced sodium content in potato leaves. Moreover, potato tuber yield showed a positive correlation with potassium content, photosynthesis and antioxidant enzyme activities. CONCLUSION:Salt tolerance efficacy of salicylic acid is authenticated in improving potato crop performance under salt stress. Salicylic acid effect was more pronounced in N-Y LARA, reflecting greater tolerance than 720-110 NARC, which was confirmed as a susceptible cultivar. Hence salicylic acid at 0.5 mmol L-1 and cultivation of N-Y LARA may be recommended in saline soil.
Authors: Juan Manuel Ruiz-Lozano; Gabriela Quiroga; Gorka Erice; Jacob Pérez-Tienda; Ángel María Zamarreño; José María García-Mina; Ricardo Aroca Journal: Int J Mol Sci Date: 2022-08-29 Impact factor: 6.208