caa a22 4500 445840889 CHVBK 20180317145343.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s10725-010-9532-3 doi (NATIONALLICENCE)springer-10.1007/s10725-010-9532-3 Exogenous salicylic acid alleviates effects of long term drought stress and delays leaf rolling by inducing antioxidant system [Elektronische Daten] [Asim Kadioglu, Neslihan Saruhan, Aykut Sağlam, Rabiye Terzi, Tuba Acet] Salicylic acid (SA) is one of the important signal molecules modulating plant responses to environmental stress. In this study, the effects of exogenous SA on leaf rolling, one of drought avoidance mechanisms, and antioxidant system were investigated in Ctenanthe setosa during long term drought stress. The plants were subjected to 38-day drought period and they were treated with or without SA (10−6 M) on the 25th, 27th and 29th days of the period. Leaf samples were harvested on the 30th, 34th and 38th days. Some antioxidant enzyme activities (superoxide dismutase, catalase, ascorbate peroxidase, dehydroascorbate reductase, monodehydroascorbate reductase, glutathione reductase), reactive oxygen species (hydrogen peroxide and superoxide) and lipid peroxidation were determined during the drought period. Treatment with SA prevented water loss and delayed leaf rolling in comparison with control leaves. Exogenous SA induced all antioxidant enzyme activities more than control leaves during the drought. Ascorbate and glutathione, α-tocopherol, carotenoid and endogenous SA level were induced by the SA treatment. Levels of reactive oxygen species were higher in SA treated plants than control ones on the 34th day. Their levels on the 38th day, however, fastly decreased in SA treated plants. SA treatment prevented lipid peroxidation while the peroxidation increased in control plants. The results showed that exogenous SA can alleviate the damaging effect of long term drought stress by decreasing water loss and inducing the antioxidant system in the plant having leaf rolling, alternative protection mechanism to drought. Springer Science+Business Media B.V., 2010 Antioxidant enzymes nationallicence Ctenanthe setosa nationallicence Drought stress nationallicence Leaf rolling nationallicence Salicylic acid nationallicence APX : Ascorbate peroxidase nationallicence ASC : Ascorbic acid nationallicence CAT : Catalase nationallicence DHA : Dehydroascorbate nationallicence DHAR : Dehydroascorbate reductase nationallicence gs : Stomatal conductance nationallicence GR : Glutathione reductase nationallicence GSH : Reduced glutathione nationallicence H2O2 : Hydrogen peroxide nationallicence MDA : Malondialdehyde nationallicence MDHAR : Monodehydroascorbate reductase nationallicence NBT : Nitro blue tetrazolium nationallicence O2•− : Superoxide anion radical nationallicence ROS : Reactive oxygen species nationallicence RWC : Relative water content nationallicence SOD : Superoxide dismutase nationallicence Ψleaf : Leaf water potential nationallicence Kadioglu Asim Department of Biology, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey aut Saruhan Neslihan Department of Biology, Faculty of Arts and Sciences, Rize University, 53100, Rize, Turkey aut Sağlam Aykut Department of Biology, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey aut Terzi Rabiye Department of Biology, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey aut Acet Tuba Department of Biology, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey aut Plant Growth Regulation Springer Netherlands 64/1(2011-05-01), 27-37 0167-6903 64:1<27 2011 64 10725 https://doi.org/10.1007/s10725-010-9532-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10725-010-9532-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kadioglu Asim Department of Biology, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey aut NATIONALLICENCE 700 1- Saruhan Neslihan Department of Biology, Faculty of Arts and Sciences, Rize University, 53100, Rize, Turkey aut NATIONALLICENCE 700 1- Sağlam Aykut Department of Biology, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey aut NATIONALLICENCE 700 1- Terzi Rabiye Department of Biology, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey aut NATIONALLICENCE 700 1- Acet Tuba Department of Biology, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey aut NATIONALLICENCE 773 0- Plant Growth Regulation Springer Netherlands 64/1(2011-05-01), 27-37 0167-6903 64:1<27 2011 64 10725 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer