Passiflora edulis Sims is a liana species of high economic interest and is an interestingmodel plant for understanding ozone action on disturbed vegetation. In this work we hypothesized that P. edulis has adaptive responses to oxidative stress that enable it to tolerate ozone damage based on its capacity to grow under a diversity of environmental conditions and to dominate disturbed areas. We exposed seedlings to three levels of ozone in a Free-Air Controlled Exposure (FACE) system (22, 41 and 58 ppb h AOT40 and 13.52, 17.24 and 20.62 mmol m(-2) POD0, over 97 days) for identifying its tolerance mechanisms. Anatomical (leaf blade structure and fluorescence emission of chloroplast metabolites), physiological (leaf gas exchange, growth rate and biomass production) and biochemical (pigments, total sugars, starch, enzymatic and non-enzymatic antioxidant metabolites, reactive oxygen species and lipid peroxidation derivatives) responses were assessed. Ozone caused decreased total number of leaves, hyperplasia and hypertrophy of the mesophyll cells, and accelerated leaf senescence. However, O-3 did not affect carbohydrates content, net photosynthetic rate, or total biomass production, indicating that the carboxylation efficiency and associated physiological processes were not affected. In addition, P. edulis showed higher leaf contents of ascorbic acid, glutathione (as well high ratio between their reduced and total forms), carotenoids, and flavonoids located in the chloroplast outer envelope membrane.

The passion fruit liana (Passiflora edulis Sims, Passifloraceae) is tolerant to ozone / Fernandes, Francine Faia; Esposito, Marisia Pannia; da Silva Engela, Marcela Regina Gonçalves; Cardoso-Gustavson, Poliana; Furlan, Claudia Maria; Hoshika, Yasutomo; Carrari, Elisa; Magni, Giada; Domingos, Marisa; Paoletti, Elena. - In: SCIENCE OF THE TOTAL ENVIRONMENT. - ISSN 0048-9697. - ELETTRONICO. - 656:(2019), pp. 1091-1101. [10.1016/j.scitotenv.2018.11.425]

The passion fruit liana (Passiflora edulis Sims, Passifloraceae) is tolerant to ozone

Carrari, Elisa;
2019

Abstract

Passiflora edulis Sims is a liana species of high economic interest and is an interestingmodel plant for understanding ozone action on disturbed vegetation. In this work we hypothesized that P. edulis has adaptive responses to oxidative stress that enable it to tolerate ozone damage based on its capacity to grow under a diversity of environmental conditions and to dominate disturbed areas. We exposed seedlings to three levels of ozone in a Free-Air Controlled Exposure (FACE) system (22, 41 and 58 ppb h AOT40 and 13.52, 17.24 and 20.62 mmol m(-2) POD0, over 97 days) for identifying its tolerance mechanisms. Anatomical (leaf blade structure and fluorescence emission of chloroplast metabolites), physiological (leaf gas exchange, growth rate and biomass production) and biochemical (pigments, total sugars, starch, enzymatic and non-enzymatic antioxidant metabolites, reactive oxygen species and lipid peroxidation derivatives) responses were assessed. Ozone caused decreased total number of leaves, hyperplasia and hypertrophy of the mesophyll cells, and accelerated leaf senescence. However, O-3 did not affect carbohydrates content, net photosynthetic rate, or total biomass production, indicating that the carboxylation efficiency and associated physiological processes were not affected. In addition, P. edulis showed higher leaf contents of ascorbic acid, glutathione (as well high ratio between their reduced and total forms), carotenoids, and flavonoids located in the chloroplast outer envelope membrane.
656
1091
1101
Goal 13: Climate action
Goal 15: Life on land
Fernandes, Francine Faia; Esposito, Marisia Pannia; da Silva Engela, Marcela Regina Gonçalves; Cardoso-Gustavson, Poliana; Furlan, Claudia Maria; Hoshika, Yasutomo; Carrari, Elisa; Magni, Giada; Domingos, Marisa; Paoletti, Elena
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2158/1282062
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