NaCl salt stress and PEG water stress differentially affect germination and early seedling growth of two sesame (Sesamum indicum L.) cultivars

NaCl salt stress and PEG water stress differentially affect germination and early seedling growth of two sesame (Sesamum indicum L.) cultivars | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article NaCl salt stress and PEG water stress differentially affect germination and early seedling growth of two sesame (Sesamum indicum L.) cultivars Taha Mohamed El-Katony, Nemat Mohamed Hassan, Samia Helmy Abo-Ismael, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4537898/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 08 Nov, 2024 Read the published version in Discover Life → Version 1 posted 16 You are reading this latest preprint version Abstract Drought stress and salt stress are serious challenges to crop productivity in the arid lands. This work investigates the impact of NaCl-salt stress and PEG-water stress on germination and embryo growth of two sesame cultivars. The red seeds of Sohg were larger with oblong appearance and lower density relative to the white seeds of Shnd. Seeds were germinated in the dark in isosmotic solutions of NaCl and PEG-6000 at 0, -0.103, -0.205, -0.410 and − 0.615 MPa. The time-based parameters, e.g. velocity, uniformity and synchrony of germination were more reliable measures of germination efficiency than the final germination percentage. The impact of PEG was more severe than that of NaCl particularly on Sohg. The peaks of daily germination percentage were lowered and delayed under stress. The genotypic variability in germinability became evident under stress in favor of Shnd. Radicle length was the most reliable measure of seedling growth but was subjected to stronger impact of NaCl than PEG. Although Na + mobilization from the seed to the emerging embryo was indifferent in the two cultivars in PEG solutions, Shnd exhibited higher Na + uptake from NaCl solutions. Whereas K + mobilization was restricted by NaCl only in Sohg, it was hastened by PEG equally in the two cultivars. The stress-vulnerable cv. (Sohg) recovered with higher magnitude than Shnd, particularly from the more stressing osmoticum (PEG). The indices of germination recovery were highest in PEG-pretreated Sohg while the fresh weight of recovered seedlings was highest in NaCl-pretreated Sohg. Sesame. Genotype. NaCl. PEG-6000. Germination speed. Germination uniformity. Seedling growth. Mineral content. Recovery Full Text Additional Declarations No competing interests reported. Tables 1 to 5 are available in the Supplementary Files section. Supplementary Files Table1.docx Table2.docx Table3.docx Table4.docx Table5.docx Cite Share Download PDF Status: Published Journal Publication published 08 Nov, 2024 Read the published version in Discover Life → Version 1 posted Editorial decision: Revision requested 08 Aug, 2024 Reviews received at journal 06 Aug, 2024 Reviews received at journal 05 Aug, 2024 Reviews received at journal 03 Aug, 2024 Reviewers agreed at journal 31 Jul, 2024 Reviewers agreed at journal 31 Jul, 2024 Reviewers agreed at journal 28 Jul, 2024 Reviewers agreed at journal 28 Jul, 2024 Reviews received at journal 21 Jul, 2024 Reviewers agreed at journal 16 Jul, 2024 Reviewers agreed at journal 14 Jul, 2024 Reviewers agreed at journal 03 Jul, 2024 Reviewers invited by journal 28 Jun, 2024 Editor assigned by journal 28 Jun, 2024 Submission checks completed at journal 21 Jun, 2024 First submitted to journal 06 Jun, 2024 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4537898","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":324306123,"identity":"66b6e528-9cf8-4277-81ac-690e7ad8e7ad","order_by":0,"name":"Taha Mohamed 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