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Lignification Response For Rolled Leaves Of Ctenanthe Setosa Under Long-Term Drought Stress, Rabi̇ye Terzi̇, Nesli̇han Saruhan Güler, Ni̇hal Çalişkan, Asi̇m Kadioğlu
Lignification Response For Rolled Leaves Of Ctenanthe Setosa Under Long-Term Drought Stress, Rabi̇ye Terzi̇, Nesli̇han Saruhan Güler, Ni̇hal Çalişkan, Asi̇m Kadioğlu
Turkish Journal of Biology
Leaf rolling is a dehydration avoidance mechanism for plants under drought stress. To understand how it affects the lignification process in response to long-term drought stress in Ctenanthe setosa plants that have the leaf-rolling mechanism, the enzymes in lignification were studied in unrolled leaves as a control and at 2 different leaf rolling indices at days 35 and 47 of the drought period. The results indicated that the activities of phenylalanine ammonia lyase, indole-3-acetic acid oxidase, soluble peroxidase, ionically wall-bound peroxidase, covalently wall-bound peroxidase, and polyphenol oxidase were increased during long-term drought stress. However, nitrate reductase activity was decreased while …
Salicylic Acid Delays Leaf Rolling By Inducing Antioxidant Enzymes And Modulating Osmoprotectant Content In Ctenanthe Setosa Under Osmotic Stress, Mehmet Demi̇ralay, Aykut Sağlam, Asi̇m Kadioğlu
Salicylic Acid Delays Leaf Rolling By Inducing Antioxidant Enzymes And Modulating Osmoprotectant Content In Ctenanthe Setosa Under Osmotic Stress, Mehmet Demi̇ralay, Aykut Sağlam, Asi̇m Kadioğlu
Turkish Journal of Biology
The effects of salicylic acid (SA) on leaf rolling under osmotic stress in Ctenanthe setosa (Roscoe) Eichler were evaluated. The leaves were pretreated with SA, paclobutrazol (PAC), and antioxidant enzyme inhibitors for 15 h and then kept in polyethylene glycol (PEG) for 4 h to promote osmotic stress. The degree of leaf rolling was measured every hour during the 4-h PEG treatment. Antioxidant enzymes (superoxide dismutase, catalase, ascorbate peroxidase, and guaiacol peroxidase) and NADPH oxidase (NOX) activities, endogenous SA contents, hydrogen peroxide, proline, and soluble sugar were determined immediately after PEG treatment. SA treatment retarded leaf rolling and induced antioxidant …