Elucidating some physiological mechanisms of salt tolerance in Brassica napus L. seedlings induced by seed priming with plant growth regulators

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dc.contributor.authorShahrasbi S.
dc.contributor.authorPirasteh-Anosheh H.
dc.contributor.authorEmam Y.
dc.contributor.authorOzturk M.
dc.contributor.authorAltay V.
dc.date.accessioned2021-05-03T20:59:04Z
dc.date.available2021-05-03T20:59:04Z
dc.date.issued2021
dc.description.abstractPresent study was undertaken to elucidate some physiological mechanisms of induced salt tolerance by different plant growth regulators (PGRs) in rapeseed (Brassica napus L.) seedlings. Three salt stress levels were given; tapwater (0.7 dS m-1), 6 dS m-1 and 12 dS m-1, which made by NaCl and CaCl2 as 2:1 molar ratio. The eight seed priming agents were included: dry seeds (no-priming), hydropriming and six PGRs primings. The used PGRs were; abscisic acid (ABA), auxin (AUX), salicylic acid (SA), chlorocholine chloride (CCC), ascorbic acid (AS) and brassinosteroid (Brs). The results revealed that salinity, depending on level, reduced seedling emergence, shoot and root growth, potassium (K+) concentration and enhanced sodium (Na+) concentration and antioxidant enzymes. These reductions could be attributed to oxidative stress and/or ion balance disturbance due to salinity stress. It is documented by reduced K+ and increased Na+ in both root and shoot as well as enhanced antioxidant enzyme activity and H2O2 in salt stressed rapeseed seedlings. Higher storage factor (SF) refers to a higher ions content kept in roots rather than transporting these to the shoot as salinity level increased. PGRs priming modulates some negative effects of salt stress on emergence, growth and physiological functions of plants. In triggering the ameliorating role of PGRs, it appeared that the ratio of Na+ to K+ is more important than their individual concentrations. Moreover, H2O2 concentration was found to be a better key for estimation of the oxidative damage rather than antioxidative enzymes. Among the PGRs, SA and Brs showed better performance, and it seems that the main mechanism of action for SA was creating ion balance and changing ion partitioning in favor of roots. For Brs it appeared to be reactive oxygen species (ROS) scavenging by inducing higher activity of antioxidant enzymes, particularly catalase. © 2021, Pakistan Botanical Society. All rights reserved.en_US
dc.description.sponsorshipUniversity of Karachi, UoK Ege Üniversitesien_US
dc.description.sponsorshipAuthors are thankful to Dr. Salman Gulzar, Associate Professor, Institu?te of Sustainable Halophjyte Utilisation, University of Karachi, Pakistan for critical reading of the manuscript. Our special thanks are due to the School of Agriculture, Shiraz University, Shiraz and National Salinity Research Center, Yazd-Iran, as well as Ege University, Izmir and Hatay Mustafa Kemal University, Hatay-Turkey for supporting this collaboration.en_US
dc.identifier.doi10.30848/PJB2021-2(34)
dc.identifier.endpage377en_US
dc.identifier.issn0556-3321
dc.identifier.issn0556-3321en_US
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-85103023665en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage367en_US
dc.identifier.urihttps://doi.org/10.30848/PJB2021-2(34)
dc.identifier.urihttps://hdl.handle.net/11454/71579
dc.identifier.volume53en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherPakistan Botanical Societyen_US
dc.relation.ispartofPakistan Journal of Botanyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAbscisic aciden_US
dc.subjectAntioxidant enzymesen_US
dc.subjectBrassinosteroiden_US
dc.subjectIon accumulationen_US
dc.subjectSalicylic aciden_US
dc.titleElucidating some physiological mechanisms of salt tolerance in Brassica napus L. seedlings induced by seed priming with plant growth regulatorsen_US
dc.typeArticleen_US

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