Chemical role of α-tocopherol in salt stress mitigation by improvement in morpho-physiological attributes of sunflower (Helianthus annuus L.)

Saudi Journal of Biological Sciences

Syeda Fasiha Amjad¹  Sunny Ahmar¹  Mustafa A. Fawzy²  Rahul Datta³  Xiukang Wang⁴  Rashid Hussain⁵  Irfana Lalarukh⁶  Ahmed A. Abdelhafez⁷  Freddy Mora-Poblete⁸  Mohamed H.H. Abbas⁹  Shams H. Abdel-Hafez^1,10 

[1] Corresponding authors.;Department of Plant Breeding and Genetics, PMAS- Arid Agriculture University, Rawalpindi 46000, Pakistan;Biology Department, College of Science, Taif University, P.O.Box 11099, Taif 21944, Saudi Arabia;College of Life Sciences, Yan’an University, Yan’an, Shaanxi 716000, PR China;Department of Botany University of Agriculture Faisalabad, 38000, Pakistan;Department of Botany, Government College Women University, Faisalabad 38000, Pakistan;Department of Chemistry, College of Science, Taif University, P.O.Box 11099, Taif 21944. Saudi Arabia;Department of Horticultural Sciences, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, 63100 Punjab, Pakistan;Institute of Biological Sciences, Campus Talca, Universidad deTalca, Talca 3465548, Chile;Institute of Biological Sciences, University of Talca, 1 Poniente 1141, Talca 3460000, Chile;

关键词: α-tocopherol;    Chlorophyll contents;    Stomatal conductance;    Photosynthesis;   

DOI  :  

来源: DOAJ

【 摘 要 】

Elevated concentrations of salts in soil and water represent abiotic stresses. It considerably restricts plant productivity. However, the use of alpha-tocopherol (α-toc) as foliar can overcome this problem. It can improve crop productivity grown under salinity stress. Limited literature is documented regarding its optimum foliar application on sunflower. That’s why the need for the time is to optimize α-toc foliar application rates for sunflower cultivated in salt-affected soil. A pot experiment was performed to select a better α-toc foliar application for mitigation of salt stress in different sunflower cultivars FH (572 and 621). There were 2 levels of salts, i.e., control (no salt stress) and sodium chloride (120 mM) and four α-toc foliar application (0, 100, 200, and 300 mg L−1). Results showed that foliar application of 100 mg/L- α-toc triggered the remarkable increase in fresh shoot weight, fresh root weight, shoot, and root lengths under salinity stress in FH-572 and FH-621 over 0 mg/L- α-toc. Foliar application of 200 mg/L- α-toc was most effective for improvement in chlorophyll a, chlorophyll b, total chlorophyll and carotenoids compared to 0 mg/L- α-toc. Furthermore, an increase in A was noted in FH-572 (17%) and FH-621 (22%) with α-toc (300 mg L−1) application under saline condition. In conclusion, the 100 and 200 mg/L- α-toc are the best application rates for the improvement in sunflower FH-572 and FH-621 growth, chlorophyll contents and gas exchange attributes. Further investigations are needed to select a better foliar application rate between 100 and 200 mg/L- α-toc at the field level under the different agro-climatic zone and soil types.

【 授权许可】

Unknown