Agritrop
Home

Response of photosynthesis and chlorophyll fluorescence to acute ozone stress in tomato (Solanum lycopersicum Mill.)

Thwe Aye Aye, Vercambre Bernard, Gautier Hélène, Gay Frédéric, Phattaralerphong Jessada, Kasemsap Poonpipope. 2014. Response of photosynthesis and chlorophyll fluorescence to acute ozone stress in tomato (Solanum lycopersicum Mill.). Photosynthetica, 52 (1) : pp. 105-116.

Journal article ; Article de revue à facteur d'impact
[img] Published version - Anglais
Access restricted to CIRAD agents
Use under authorization by the author or CIRAD.
document_572923.pdf

Télécharger (1MB)

Quartile : Q2, Sujet : PLANT SCIENCES

Abstract : The crop sensitivity to ozone (O3) is affected by the timing of the O3 exposure, by the O3 concentration, and by the crop age. To determine the physiological response to the acute ozone stress, tomato plants were exposed to O3 at two growth stages. In Experiment I (Exp. I), O3 (500 ?g m-3) was applied to 30-d-old plants (PL30). In Experiment II (Exp. II), three O3 concentrations (200, 350, and 500 ?g m-3) were applied to 51-d-old plants (PL51). The time of the treatment was 4 h (7:30 - 11:30 h). Photosynthesis and chlorophyll fluorescence measurements were done 4 times (before the exposure; 20 min, 20 h, and 2-3 weeks after the end of the treatment) using a LI-COR 6400 photosynthesis meter. The stomatal pore area and stomatal conductance were reduced as the O3 concentration increased. Ozone induced the decrease in the photosynthetic parameters of tomato regardless of the plant age. Both the photosystem (PS) II operating efficiency and the maximum quantum efficiency of PSII photochemistry declined under the ozone stress suggesting that the PSII activity was inhibited by O3. The impaired PSII contributed to the reduced photosynthetic rate. The greater decline of photosynthetic parameters was found in the PL30 compared with the PL51. It proved the age-dependent ozone sensitivity of tomato, where the younger plants were more vulnerable. Ozone caused the degradation of photosynthetic apparatus, which affected the photosynthesis of tomato plants depending on the growth stage and the O3 concentration. (Résumé d'auteur)

Mots-clés Agrovoc : Solanum lycopersicum

Mots-clés géographiques Agrovoc : Thaïlande

Classification Agris : F60 - Plant physiology and biochemistry

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

  • Thwe Aye Aye, Yezin Agricultural University (MMR)
  • Vercambre Bernard, INRA (FRA)
  • Gautier Hélène, INRA (FRA)
  • Gay Frédéric, CIRAD-PERSYST-UMR Eco&Sols (THA) ORCID: 0000-0002-7624-8489
  • Phattaralerphong Jessada, Kasetsart University (THA)
  • Kasemsap Poonpipope, Kasetsart University (THA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/572923/)

View Item (staff only) View Item (staff only)

[ Page générée et mise en cache le 2021-03-28 ]