Exogenously applied nicotinic acid alleviates drought stress by enhancing morpho-physiological traits and antioxidant defense mechanisms in wheat.

Autor: Khurshid N; Department of Agronomy, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, 63100, Pakistan., Bukhari MA; Department of Agronomy, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, 63100, Pakistan., Ahmad T; Department of Horticulture, MNS University of Agriculture Multan, 59300, Pakistan., Ahmad Z; Department of Botany, University of Central Punjab, Constituent Punjab College, Bahawalpur 63100, Pakistan. Electronic address: zahoorahmadbwp@gmail.com., Jatoi WN; Department of Agronomy, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, 63100, Pakistan., Abbas SM; Department of Horticulture, Faculty of Agricultural Sciences, University of the Punjab Lahore, 54590, Pakistan., Latif A; Scientific Officer, Vegetable Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan., Raza A; Department of Botany, Government Sadiq College Women University, Bahawalpur 63100, Punjab, Pakistan., Aurangzaib M; Department of Agronomy, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, 63100, Pakistan., Hashem A; Botany and Microbiology Department, College of Science, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia., Avila-Quezada GD; Facultad de Ciencias Agrotecnológicas, Universidad Autónoma de Chihuahua, 31350 Chihuahua, Mexico., Abd Allah EF; Plant Production Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia.
Jazyk: angličtina
Zdroj: Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2023 Sep 15; Vol. 263, pp. 115350. Date of Electronic Publication: 2023 Aug 14.
DOI: 10.1016/j.ecoenv.2023.115350
Abstrakt: Across the globe, the frequent occurrence of drought spells has significantly undermined the sustainability of modern high-input farming systems, particularly those focused on staple crops like wheat. To ameliorate the deleterious impacts of drought through a biologically viable and eco-friendly approach, a study was designed to explore the effect of nicotinic acid on different metabolic, and biochemical processes, growth and yield of wheat under optimal moisture and drought stress (DS). The current study was comprised of different levels of nicotinic acid applied as foliar spray (0 g L -1 , 0.7368, 1.477, 2.2159 g L -1 ) and fertigation (0.4924, 0.9848, and 1.4773 g L -1 ) under normal conditions and imposed drought by withholding water at anthesis stage. The response variables were morphological traits such as roots and shoots characteristics, yield attributes, grain and biological yields along with biosynthesis of antioxidants. The results revealed that nicotinic acid dose of 2.2159 g L -1 out-performed rest of treatments under both normal and DS. The same treatment resulted in the maximum root growth (length, fresh and dry weights, surface area, diameter) and shoot traits (length, fresh and dry weights) growth. Additionally, foliar applied nicotinic acid (2.2159 g L -1 ) also produced as the highest spike length, grains spike -1 , spikelet's spike -1 and weight of 1000 grains. Moreover, these better yield attributes led to significantly higher grain yield and biological productivity of wheat. Likewise in terms of physiological growth of wheat under DS, the same treatment remained superior by recording the highest SPAD value, relative water content, water potential of leaves, leaf area, stomatal conductance (292 mmolm -2 S -1 ), internal carbon dioxide concentration, photosynthesis and transpiration rate. Interestingly, exogenously applied nicotinic acid remained effective in triggering the antioxidant system of wheat by recording significantly higher catalase, peroxidase, superoxide dismutase and ascorbate peroxidase.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: