Responses of citrus plants to ozone: leaf biochemistry, antioxidant mechanisms and lipid peroxidation.
The effects of ozone upon 3-year-old trees of Clementina mandarin (Citrus clementina Hort. ex Tan.) cv. Marisol exposed for 12 months to ambient (10 nl l(-1)) and high (30 and 65 nl l(-1)) concentrations in open top chambers (OTCs) were investigated. The data showed that in leaves, ozone reduced total chlorophylls, carotenoid and carbohydrate concentration, and increased 1-aminocyclopropane-1-carboxylic acid (ACC) content and ethylene production. In treated plants, the ascorbate leaf pool was decreased, while lipid peroxidation and solute leakage were significantly higher than in ozone-free controls. The data indicated that ozone triggered protective mechanisms against oxidative stress in citrus.
Iglesias
Domingo J
DJ
Department Citricultura y Otros Frutales, Instituto Valenciano de Investigaciones Agrarias. Apartado Oficial, 46113 Moncada, Valencia, Spain. iglesias@ivia.es
Calatayud
Angeles
A
Barreno
Eva
E
Primo-Millo
Eduardo
E
Talon
Manuel
M
D000393:Air Pollutants / Q000633:toxicity; D000598:Amino Acids, Cyclic / Q000378:metabolism; D000975:Antioxidants / Q000378:metabolism*; D001205:Ascorbic Acid / Q000378:metabolism; D050260:Carbohydrate Metabolism; D002338:Carotenoids / Q000378:metabolism; D002734:Chlorophyll / Q000378:metabolism; D002957:Citrus / Q000187:drug effects* / Q000378:metabolism; D005030:Ethylenes / Q000378:metabolism; D015227:Lipid Peroxidation / Q000187:drug effects*; D010126:Ozone / Q000633:toxicity*; D018515:Plant Leaves / Q000187:drug effects* / Q000378:metabolism*
D000393:Air Pollutants; D000598:Amino Acids, Cyclic; D000975:Antioxidants; D005030:Ethylenes; D002734:Chlorophyll; D002338:Carotenoids; C023863:1-aminocyclopropane-1-carboxylic acid; D010126:Ozone; C036216:ethylene; D001205:Ascorbic Acid