Effects of acute ozone stress on reproductive traits of tomato, fruit yield and fruit composition
2015
Thwe, Aye Aye | Vercambre, Gilles | Gautier, Hélène | Gay, Frédéric | Phattaralerphong, Jessada | Kasemsap, Poonpipope | Yezin Agricultural University | Department of Horticulture, Tropical Agriculture ; Kasetsart University [Bangkok, Thailand] (KU) | Unité de recherche Plantes et Systèmes de Culture Horticoles (PSH) ; Institut National de la Recherche Agronomique (INRA) | Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) | Faculty of Natural Resources and Agro- Industry ; Kasetsart University [Bangkok, Thailand] (KU) | Department of Horticulture, Tropical Agriculture ; Kasetsart University [Bangkok, Thailand] (KU) | Scholarship Foundation (French Embassy - Thailand International Cooperation Agency - Thailand Research Fund)
Tomato is sensitive to ozone. Fruit growth and composition is altered under ozone stress by modification of reproductive development. . Fifty-one-day-old plants were exposed to three concentrations of ozone (200, 350 and 500 µg m(-3) ) for four hours.</br>Ozone reduced well-developed fruit number and fruit size, but it did not significantly affect flowering rate and fruit setting rate. The effect of ozone depends on organ developmental stage at the time of ozone application, as flowers and young fruits at the time of ozone exposure were more affected. Contents of total soluble sugars (Total SS), total organic acids (Total OA) and ascorbic acid (AsA) increased in fruits harvested from ozone-treated plants. Tomato fruit composition was altered under ozone stress, leading to a lower sugar-acid ratio. These changes were mostly due to increased contents of malic acid, ascorbate , and glucose despite a decrease in sucrose.</br>Acute ozone exposure up to 500 µg m(-3) greatly influences tomato fruit quality. As final fruit yield was not significantly reduced, it highlighted that there may be compensatory mechanisms present in the reproductive structures of tomato. Further research would be necessary to determine how reproductive traits are affected by repeated ozone exposure or longer term exposure
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