PubMed İndeksli Yayınlar Koleksiyonu

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Browsing PubMed İndeksli Yayınlar Koleksiyonu by Publisher "ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER"

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    Gene expression and mucilage adaptations to salinity in germination of extreme halophyte Schrenkiella parvula seeds
    (ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER, 2025) Keriman Sekerci; Nahoko Higashitani; Rengin Ozgur; Atsushi Higashitani; Ismail Turkan; Baris Uzilday; Ozgur, Rengin; Şekerci, Keriman; Turkan, Ismail; Higashitani, Nahoko; Higashitani, Atsushi; Uzilday, Baris
    Salinization is a significant global issue causes irreversible damage to plants by reducing osmotic potential inhibiting seed germination and impeding water uptake. Seed germination a crucial step towards the seedling stage is regulated by several hormones and genes with the balance between abscisic acid and gibberellin being the key mechanism that either promotes or inhibits this process. Additionally mucilage a gelatinous substance is known to provide protection against drought herbivory soil adhesion and seed sinking. However limited information is available on the structure and thickness of seed mucilage in halophytes under different salinity conditions. In this study the mucilage structure of the extreme halophyte Schrenkiella parvula was compared with the glycophyte Arabidopsis thaliana in response to salinity. We found differences in the expression levels of genes such as ABI5 RGL2 DOG1 ENO2 and DHAR2 which are involved in seed germination and antioxidant activity as well as in the mucilage structure of seeds of S. parvula and A. thaliana seeds at different salt concentrations. The responses of seed germination of S. parvula to salinity indicate that it is more salt-tolerant than A. thaliana. Additionally it was found that S. parvula mucilage decreased under salt conditions but not under mannitol conditions whereas in A. thaliana mucilage did not change under both conditions which is one of the adaptation strategies of S. parvula to salt conditions. We believe that these fundamental analyzes will provide a foundation for future molecular and biochemical studies comparing the responses of crops and halophytes to salinity stress.
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    Citation - WoS: 2
    Citation - Scopus: 2
    Melatonin mediated tolerance to benzalkonium chloride phytotoxicity through improved growth- photochemical reactions- and antioxidant system in wild-type and snat2 mutant Arabidopsis lines
    (ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER, 2024) Evren Yildiztugay; Busra Arikan Abdulveli; Ceyda Ozfidan-Konakci; Ismail Turkan; Turkan, Ismail; Yildiztugay, Evren; Arikan Abdulveli, Busra; Abdulveli, Busra Arikan; Ozfidan-Konakci, Ceyda
    Melatonin (Mel) is a phytohormone that plays a crucial role in various plant processes including stress response. Despite numerous studies on the role of Mel in stress resistance its significance in plants exposed to benzalkonium chloride (BAC) pollution remains unexplored. BAC a common antiseptic poses a threat to terrestrial plants due to its widespread use and inefficient removal leading to elevated concentrations in the environment. This study investigated the impact of BAC (0.5 mg L-1) pollution on wild-type Col-0 and snat2 knockout mutant Arabidopsis lines revealing reduced growth altered water relations and gas exchange parameters. On the other hand exogenous Mel (100 mu M) treatments mitigated BAC-induced phytotoxicity and increased the growth rate by 1.8-fold in Col-0 and 2-fold in snat2 plants. snat2 mutant seedlings had a suppressed carbon assimilation rate (A) under normal conditions but BAC contamination led to further A repression by 71% and 48% in Col-0 and snat2 leaves respectively. However Mel treatment on stressed plants was successful in improving Fv/Fm and increased the total photosynthesis efficiency by regulating photochemical reactions. Excessive H2O2 accumulation in the guard cells of plants exposed to BAC pollution was detected by confocal microscopy. Mel treatments triggered almost all antioxidant enzyme activities (except POX) in both Arabidopsis lines under stress. This enhanced antioxidant activity facilitated by foliar Mel application contributed to the alleviation of oxidative damage regulation of photosynthesis reactions and promotion of plant growth in Arabidopsis. In addition to corroborating results observed in many agricultural plants regarding the development of tolerance to environmental stresses this study provides novel insights into the action mechanisms of Mel under the emerging pollutant benzalkonium chloride.