Effects of elevated ozone on the emission of volatile isoprenoids from flowers and leaves of rose (Rosa sp.) varieties. (15th December 2021)

• Record Type: Journal Article
• Authors: Yuan, Xiangyang; Feng, Zhaozhong; Hu, Chunfang; Zhang, Kun; Qu, Laiye; Paoletti, Elena
• Is Part Of: Environmental pollution. Volume 291(2021)
• Publication Date: 2021-12-15
• Subjects: Volatile isoprenoids -- Floral and foliar emissions -- O3 pollution -- Exposure duration -- BVOC precursors; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2021.118141
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: Tropospheric ozone (O3 ) affects isoprenoid emissions, and floral emissions in particular, which may result in potential impacts on the interactions of plants with other organisms. The effects of ozone (O3 ) on isoprenoid emissions have been investigated for many years, while knowledge on O3 effects on floral emissions is still scarce and the relevant mechanism has not been clarified so far. We investigated the effects of O3 on floral and foliar isoprenoid emissions (mainly isoprene, monoterpenes and sesquiterpenes) and their synthase substrates from three rose varieties (CH, Rosa chinensis Jacq. var. chinensis ; SA, R. hybrida 'Saiun'; MO, R. hybrida 'Monica Bellucci') at different exposure durations. Results indicated that the O3 -induced stimulation after short-term exposure (35 days after the beginning of O3 exposure) was significant only for sesquiterpene emissions from flowers, while long-term O3 exposure (90 days after the beginning of O3 exposure) significantly decreased both foliar and floral monoterpene and sesquiterpene emissions. In addition, the observed decline of emissions under long-term O3 exposure resulted from the limitation of synthase substrates, and the responses of emissions and substrates varied among varieties, with the greatest variation in the O3 -sensitive variety. These findings provide important insights on plant isoprenoid emissions and species selection for landscaping, especially in areas with high O3 concentration. Abstract : Floral isoprenoid emissions were higher and more sensitive to short-term O3 exposure relative to foliar emissions, while both foliar and floral emissions significantly decreased after long-term O3 exposure due to the limitation of their synthase substrates.