TAILIEUCHUNG - Changes in antioxidative enzymes of young and mature leaves of tomato seedlings under drought stress

The effects of exogenous abscisic acid (ABA) on antioxidant enzymes of young and mature leaves of 4-week old Lycopersicon esculentum cv. Ailsa Craig and ABA-deficient mutant, notabilis, were investigated under drought stress. Although ABA induced increases in ascorbate peroxidase (APX), glutathione reductase (GR) and catalase (CAT) activities in drought-stressed young leaves of notabilis, CAT activities remained unchanged in both ABA-treated young and mature leaves of Ailsa Craig under drought. | Turk J Biol 29 (2005) 211-216 © TÜB‹TAK Changes in Antioxidative Enzymes of Young and Mature Leaves of Tomato Seedlings under Drought Stress Serpil ÜNYAYAR, Fazilet Özlem ÇEK‹Ç University of Mersin, Arts and Science Faculty, Department of Biology, Çiftlikköy Campus, 33343 Mersin - TURKEY Received: Abstract: The effects of exogenous abscisic acid (ABA) on antioxidant enzymes of young and mature leaves of 4-week old Lycopersicon esculentum cv. Ailsa Craig and ABA-deficient mutant, notabilis, were investigated under drought stress. Although ABA induced increases in ascorbate peroxidase (APX), glutathione reductase (GR) and catalase (CAT) activities in drought-stressed young leaves of notabilis, CAT activities remained unchanged in both ABA-treated young and mature leaves of Ailsa Craig under drought. Superoxide dismutase (SOD) activity did not substantially increase in notabilis or Ailsa Craig in all treatments. APX activity significantly increased in ABA-, drought- and drought+ABA- treated young leaves of notabilis. These results indicated that the antioxidant enzyme activities in drought-stressed and ABA-treated leaves might change with the production of active oxygen species (AOS) depending on the ABA content, and the developmental stages of leaves might contribute to the differential prevention of oxidative damage in plants exposed to drought. Key Words: Abscisic acid, Antioxidant enzymes, Drought stress, notabilis mutant, Lycopersicon esculentum Kurakl›k Stresi Alt›ndaki Domates Fidelerinin Genç ve Olgun Yapraklar›n›n Antioksidant Enzimlerindeki De¤ifliklikler Özet: Kurakl›k stresine maruz b›rak›lan 4 haftal›k Lycopersicon esculentum Mill. cv. Ailsa Craig (AC) and absisik asit (ABA) mutant› notabilis’in genç ve olgun yapraklar›nda antioksidant enzimler üzerine ABA uygulamas›n›n etkisi incelendi. ABA kurakl›k stresi uygulanan notabilis’in genç yapraklar›nda askorbat peroksidaz (AP), glutatyon reduktaz (GR) ve katalaz (KAT) .

• Sinh học
• Abscisic acid
• Antioxidant enzymes
• Drought stress
• Notabilis mutant
• Lycopersicon esculentum
• Agricultural science
• Dichlorophenoxy acetic acid
• Hydrogen peroxide induced resistance related
• Components against potato early blight
• động vật
• thực vật
• khí khổng
• thoat hơi nước
• Bài giảng Sinh lý thực vật
• Khám phá Abscisic Acid
• Sản phẩm quang hợp
• Quá trình phát sinh phôi
• Sinh tổng hợp
• Trao đổi ABA ở thực vật
• Citrullus lanatus
• Chilling injury
• Root fresh
• Growing watermelons
• Phanerochaete chrysosporium ME446
• Immobilization cells
• Polyurethane foam
• Synthesize auxin
• BMC Plant Biology
• Galactinol synthases
• Water deficit
• Biotic stress tolerance
• Chinese jujube
• Ziziphus jujuba
• Fruit ripening
• Non climacteric
• Transcriptome sequencing
• Flame seedless
• Fruit quality
• Time of ripening
• Fruit quality of flame seedless grape
• Pre harvest application of hydrogen cyanamide
• Plant Biology
• RNA Seq
• Transcription factors
• Resistance genes
• BMC Genomics
• Hordeum vulgare
• Sucrose nonfermenting 1
• Gene family
• Metabolic regulation
• Stress responses
• Gerbera hybrida
• Stem bending
• Water stress
• Oryza sativa L
• Grain yield and quality
• Assimilates allocation
• Sugar metabolism
• Abscisic acid signaling
• Organ specificity
• Vitis vinifera L
• BiNGO plug in software
• Proline metabolism
• Root oxidative damage
• Hypoxic stress
• Gibberellic acid
• Jasmonic acid
• Salicylic acid
• 5 Aminolevulinic acid dehydratase
• Growth criteria
• Corn Zea mays L
• Corn seedlings
• Berry set
• Indole 3 acetic acid
• Gas chromatography
• Transcription factor
• Drought responsive gene
• Senescenceassociated gene
• Arabidopsis thaliana
• Verticillium longisporum
• Oilseed rape
• Quantitative disease resistance
• Lentinus tigrinus
• Laetiporus sulphureus
• Olive mill waste water
• Plant hormones
• Chilling stress
• Nitric oxide
• Oxidative damage
• Antioxidant enzyme
• Transgenic tobacco
• Phosphatidic acid
• Stomatal closure
• Lipid peroxidation
• Phosphate starvation response
• Ubiquitin proteasome pathway
• P coumaric acid
• Rourea harmandiana
• Ethyl acetate extract
• Chemical constituents of Rourea Harmandiana Pierre
• Abiotic stress
• Biotic stress