{"id":2423,"date":"2023-12-27T11:01:57","date_gmt":"2023-12-27T09:01:57","guid":{"rendered":"https:\/\/urbag.eu\/?p=2423"},"modified":"2023-12-27T11:01:57","modified_gmt":"2023-12-27T09:01:57","slug":"new-publication-in-heliyon","status":"publish","type":"post","link":"https:\/\/webs.uab.cat\/atmosphere\/2023\/12\/27\/new-publication-in-heliyon\/","title":{"rendered":"New publication in “Heliyon”"},"content":{"rendered":"

\"\"<\/a><\/p>\n

See full article\/ Veure l’article complet<\/strong><\/a><\/p>\n

 <\/p>\n

English:<\/strong><\/p>\n

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 \u03bcg m\u22123) and eightfold (6.63 \u03bcg m\u22123) 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 emission response 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\u2019s indoor environments.<\/p>\n

\n

Catal\u00e0:<\/strong><\/p>\n

Actualment, el disseny urb\u00e0 est\u00e0 promovent la inclusi\u00f3 de plantes als edificis. No obstant aix\u00f2, les plantes emeten compostos org\u00e0nics vol\u00e0tils biog\u00e8nics (BVOCs), que sols o en combinaci\u00f3 amb altres mol\u00e8cules transportades per l’aire com el CO2, poden resultar en un augment general de la contaminaci\u00f3 troposf\u00e8rica. Molts estudis han documentat els efectes dels factors bi\u00f2tics i abi\u00f2tics en les respostes de BVOC de les plantes, per\u00f2 pocs han avaluat la contribuci\u00f3 dels nivells t\u00edpics de CO2 que es troben en espais de treball i reuni\u00f3 en interiors. Per respondre a aquesta pregunta, vam monitoritzar les emissions de CO2 i BVOC constitutives (MT-limonene) i indu\u00efdes (LOX-cis-3-hexenal) d’un cultiu de tom\u00e0quet completament desenvolupat cultivat hidrop\u00f2nicament dins d’un hivernacle integrat al terrat (i-RTG) en un clima mediterrani. Es van realitzar dos assajos distintius de CO2 a nivell de la i-RTG subministrant o no CO2. A continuaci\u00f3, es va avaluar l’impacte del CO2 en l’emissi\u00f3 fisiol\u00f2gica de les plantes i es van comparar les taxes de BVOC resultants amb refer\u00e8ncia als valors EU-LCI. El MT-limonene va ser omnipresent entre els assajos i el m\u00e9s abundant, mentre que el LOX-cis-3-hexenal nom\u00e9s es va detectar sota gesti\u00f3 controlada de CO2. Els nivells m\u00e9s alts detectats estaven per sota dels LCI indicats i eren aproximadament deu vegades inferiors al LCI corresponent per al MT-limonene (50,88 vs. 5000 \u03bcg m\u22123) i vuit vegades (6,63 \u03bcg m\u22123) superiors al nivell d’emissi\u00f3 constitutiu de LOX-cis-3-hexenal. Durant el mostreig est\u00e8s (10 min), els resultats van revelar una disminuci\u00f3 general de les emissions i una concentraci\u00f3 significativament diferent de CO2 entre els assajos. Malgrat taxes decreixents similars de fotos\u00edntesi neta prevista (Pn) i conduct\u00e0ncia estom\u00e0tica (gs), la seva correlaci\u00f3 amb la disminuci\u00f3 de CO2 en condicions incontrolades va suggerir indirectament un impacte negatiu de CO2 en l’activitat d’emissions de les plantes. Per contra, l’augment de CO2 sota l’assaig controlat va mostrar una correlaci\u00f3 positiva amb les emissions indu\u00efdes, per\u00f2 no amb les constitutives. A causa dels nivells significativament m\u00e9s alts d’humitat relativa registrats sota la condici\u00f3 incontrolada, es va considerar que aquest factor afectava m\u00e9s que el CO2, la resposta a l’emissi\u00f3 i fins i tot la seva recollida. Aquesta hip\u00f2tesi va ser recolzada per troballes de la literatura i atribu\u00efda a un problema com\u00fa relacionat amb el mostreig en recinte est\u00e0tic. Per tant, vam suggerir un seguiment acurat de les condicions de mostreig o millores addicionals per evitar biaixos i subestimaci\u00f3 de les emissions reals. Basant-nos en els principals resultats, no vam observar evid\u00e8ncia d’un efecte perill\u00f3s de les taxes de CO2 registrades sobre les emissions de BVOC de la planta de tom\u00e0quet. A m\u00e9s, a causa dels baixos nivells de BVOC mesurats a la i-RTG, vam assumir com a segura la recirculaci\u00f3 d’aquest aire al llarg dels ambients interiors de l’edifici.<\/p>\n

 <\/p>\n

\"\"<\/a><\/p>\n

 <\/p>\n

Simplified representation of the dynamic (active) emission sampling with static enclosure, with or without CO2 supply (A.1). Picture taken
\nduring the setup of the sampling chamber on a tomato plant (A.2).\u00a0<\/b><\/em><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Title: Measuring BVOC emissions released by tomato plants grown in a soilless integrated rooftop greenhouse \/<\/p>\n

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.<\/p>\n","protected":false},"author":3153,"featured_media":2427,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[270,271,272,273,21,274,275,276,277,278,279],"class_list":["post-2423","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general","tag-abiotic-factors","tag-biotic","tag-buildings","tag-bvocs","tag-co2","tag-eu-lci","tag-mediterranean-climate","tag-plants","tag-rtg","tag-tomatoes","tag-urban-design"],"_links":{"self":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts\/2423","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/users\/3153"}],"replies":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/comments?post=2423"}],"version-history":[{"count":0,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts\/2423\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/media\/2427"}],"wp:attachment":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/media?parent=2423"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/categories?post=2423"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/tags?post=2423"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}