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| Pàgina inicial > Articles > Articles publicats > Measuring BVOC emissions released by tomato plants grown in a soilless integrated rooftop greenhouse |
(Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals) (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals) (Università di Bologna. Dipartimento di Scienze Agrarie e Alimentari) (Università di Bologna. Dipartimento di Scienze Agrarie e Alimentari) (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental) (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)| Data: | 2024 |
| Descripció: | 13 pàg. |
| Resum: | Urban design is currently promoting the inclusion of plants in buildings. However, plants emit biogenic volatile organic compounds (BVOCs), which alone or in combination with other airborne molecules such as CO2, may result in a general increase in tropospheric pollution. Many studies have documented the effects of biotic and abiotic factors on plant BVOC responses, but few have assessed the contribution of typical CO2 levels found in indoor work and meeting spaces. To answer this question, we monitored CO2 and constitutive (MT-limonene) and induced (LOX-cis-3-hexenal) BVOC emissions of a fully developed tomato crop grown hydroponically inside an integrated rooftop greenhouse (i-RTG) in a Mediterranean climate. Two distinctive CO2 assays were performed at the level of the i-RTG by supplying or not CO2. The impact of CO2 on plant physiological emittance was then assessed, and the resulting BVOC rates were compared with reference to EU-LCI values. MT-limonene was ubiquitous among the assays and the most abundant, while LOX-cis-3-hexenal was detected only under controlled CO2 management. The highest levels detected were below the indicated LCIs and were approximately tenfold lower than the corresponding LCI for MT-limonene (50. 88 vs. 5000 μg m−3) and eightfold (6. 63 μg m−3) higher than the constitutive emission level for LOX-cis-3-hexenal. Over extended sampling (10 min) findings revealed a general emission decrease and significantly different CO2 concentration between the assays. Despite similar decreasing rates of predicted net photosynthesis (Pn) and stomatal conductance (gs) their correlation with decreasing CO2 under uncontrolled condition indirectly suggested a negative CO2 impact on plant emission activity. Conversely, increasing CO2 under the controlled assay showed a positive correlation with induced emissions but not with constitutive ones. Because of significantly higher levels of relative humidity registered under the uncontrolled condition, this factor was considered to affect more than CO2 the emissionresponse and even its collection. This hypothesis was supported by literature findings and attributed to a common issue related with the sampling in static enclosure. Hence, we suggested a careful monitoring of the sampling conditions or further improvements to avoid bias and underestimation of actual emissions. Based on the main outcomes, we observed no evidence of a hazardous effect of registered CO2 rates on the BVOC emissions of tomato plant. Furthermore, because of the low BVOC levels measured in the i-RTG, we assumed as safe the recirculation of this air along building's indoor environments. |
| Ajuts: | European Commission 862663 European Commission 834934 European Commission 818002 Ministerio de Ciencia e Innovación PID2021-126845OB-C21 Ministerio de Ciencia e Innovación TED2021-130047B-C21 Ministerio de Ciencia e Innovación CEX2019-000940-M Agència de Gestió d'Ajuts Universitaris i de Recerca 2020/FI_B01004 Agència de Gestió d'Ajuts Universitaris i de Recerca 2020/PANDE-00021 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00734 |
| Nota: | Unidad de excelencia María de Maeztu CEX2019-000940-M |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.  |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | Volatile sampling ; Solanum lycopersicum L. ; I-rtg ; CO2 monitoring ; Indoor agriculture ; Urban agriculture ; SDG 11 - Sustainable Cities and Communities ; SDG 13 - Climate Action |
| Publicat a: | Heliyon, Vol. 10, issue 1 (Jan. 2024) , art. e23854, ISSN 2405-8440 |
