Plant oxidative status under ozone pollution as predictor for aphid population growth: the case of Metopolophium dirhodum (Hemiptera: Aphididae) in Triticum aestivum (Poales: Poaceae)

TELESNICKI M; MARTINEZ-GHERSA MA; GHERSA, C.M.

BIOCHEMICAL SYSTEMATICS AND ECOLOGY

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2018 vol. 77 p. 51 - 56

0305-1978

Ozone is a secondary air pollutant that affects plants and animals through several physiological mechanisms that involve changes in redox status. However, the consequences of ozone pollution on aphids arenot well understood. Therefore, we have experimentally tested: if oxidative stress on the host plantaffects lipid peroxidation in aphids or aphid population growth. Wheat plants (Triticum aestivum) wereexposed to 140 p.p.b. of ozone or filtered air in open top chambers for three consecutive days andMetopolophium dirhodum (Walker, 1849, Hemiptera: Aphididae) aphids were transferred to the plantsimmediately after ozone exposure or 72 h later. Ozone exposure reduced antioxidant potential withinplant tissues and had no effect on plants? lipid peroxidation. Lipid peroxidation in aphids fed upon theseplants was similar among treatments. Although aphids successfully colonised the plants in all thetreatments, the populations established on plants immediately after ozone exposure grew at higher ratesthan those established 72 h after ozone exposure had ended, independently of ozone level. In conclusion,aphids were tolerant to plant mediated effects of ozone. Therefore, a greater attention should be put inthe direct effects of ozone on M. dirhodum - T. aestivum interaction.