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Bano A, Noreen Z, Tabassum F, Zafar F, Rashid M, Aslam M, Shah AA, Shah AN, Jaremko M, Alasmael N, Abdelsalam NR, Hasan ME. Induction of salt tolerance in Brassica rapa by nitric oxide treatment. FRONTIERS IN PLANT SCIENCE 2022; 13:995837. [PMID: 36466280 PMCID: PMC9709477 DOI: 10.3389/fpls.2022.995837] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 09/27/2022] [Indexed: 06/17/2023]
Abstract
Salinity is one of the major plant abiotic stresses increasing over time worldwide. The most important biological role of nitric oxide (NO) in plants is related to their development and growth under abiotic conditions. The present experiment was conducted to study the effect of salt stress (0 and 100 mM) and NO (0 and 80 μM) on two different ecotypes of Brassica rapa (L.): PTWG-HL and PTWG-PK. The different growth attributes, biochemical and physiological parameters, and the mineral contents were examined. The results indicated increased hydrogen peroxide (H2O2), relative membrane permeability, malondialdehyde (MDA), and Na+ content and decreased plant biomass in both ecotypes (PTWG-PK and PTWG-HL) under salt stress. In contrast, NO treatment resulted in increased plant biomass, chlorophyll content, and total soluble proteins and decreased H2O2, relative membrane permeability, MDA, total phenolic content, catalase (CAT), peroxidase (POD), ascorbate peroxidase (APX), and Na+. The combined effect of salt stress and NO application increased the chlorophyll a content, total phenolic content, and total soluble proteins, but decreased H2O2, relative membrane permeability, MDA, and Na+. The response of carotenoids, anthocyanins, and K+, Ca2+, and Cl- ions varied in both ecotypes under all treatment conditions. The PTWG-PK ecotype showed maximum overall growth response with the application of NO. Henceforth, it is proposed that the molecular mechanisms associated with NO-induced stress tolerance in plants may be exploited to attain sustainability in agriculture under changing climate scenarios.
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Affiliation(s)
- Atiyyah Bano
- Department of Botany, Division of Science and Technology, University of Education, Lahore, Pakistan
| | - Zahra Noreen
- Department of Botany, Division of Science and Technology, University of Education, Lahore, Pakistan
| | - Fariha Tabassum
- Department of Botany, Division of Science and Technology, University of Education, Lahore, Pakistan
| | - Fizza Zafar
- Department of Botany, Division of Science and Technology, University of Education, Lahore, Pakistan
| | - Madiha Rashid
- Department of Botany, Division of Science and Technology, University of Education, Lahore, Pakistan
- Department of Botany, Lahore College for Women University, Lahore, Pakistan
| | - Muhammad Aslam
- Department of Chemistry, Division of Science and Technology, University of Education, Lahore, Pakistan
| | - Anis Ali Shah
- Department of Botany, Division of Science and Technology, University of Education, Lahore, Pakistan
| | - Adnan Noor Shah
- Department of Agricultural Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
| | - Mariusz Jaremko
- Smart-Health Initiative and Red Sea Research Center, Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Noura Alasmael
- Smart Hybrid Materials Laboratory, Physical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Nader R. Abdelsalam
- Agricultural Botany Department, Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria, Egypt
| | - Mohamed E. Hasan
- Bioinformatics Department, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, Sadat City, Egypt
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Ren Y, Zhu S. Nitric oxide promotes energy metabolism and protects mitochondrial DNA in peaches during cold storage. FRONTIERS IN PLANT SCIENCE 2022; 13:970303. [PMID: 36275543 PMCID: PMC9582448 DOI: 10.3389/fpls.2022.970303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 09/16/2022] [Indexed: 05/30/2023]
Abstract
The mitochondria are important organelles related to energy metabolism and are susceptible to oxidative damage. In this experiment, peaches (Prunus persica) were treated with distilled water (as the control), 15 μmol L-1 of nitric oxide (NO), and 20 μmol L-1 of carboxy-PTIO (NO scavenger). The changes in mitochondrial physiological indicators, energy metabolism process, and mitochondrial DNA (mtDNA) damage and repair were quantified. Compared with the control, NO treatment reduced mitochondrial oxygen consumption and the reactive oxygen species content, increased mitochondrial respiration control rate, and promoted energy metabolism by influencing the activities of citrate synthase, aconitase, isocitrate dehydrogenase, and α-ketoglutarate dehydrogenase in the tricarboxylic acid cycle and ATPase activity in peach mitochondria. NO treatment also maintained the relative copy number of mtDNA and the relative amplification of long PCR in peaches, decreased the level of 8-hydroxy-2 deoxyguanosine, and upregulated the expression of PpOGG1, PpAPE1, and PpLIG1. These results indicated that exogenous NO treatment (15 μmol L-1) could reduce mtDNA oxidative damage, maintain mtDNA molecular integrity, and inhibit mtDNA copy number reduction by reducing the reactive oxygen species content, thereby promoting mitochondrial energy metabolism and prolonging the storage life of peaches at low temperatures.
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Affiliation(s)
| | - Shuhua Zhu
- College of Chemistry and Material Science, Shandong Agricultural University, Taian, China
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