{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,24]],"date-time":"2026-06-24T19:06:13Z","timestamp":1782327973732,"version":"3.54.5"},"reference-count":71,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2021,9,29]],"date-time":"2021-09-29T00:00:00Z","timestamp":1632873600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Yungu Rural Eco Tourism Development Co., Ltd, Shangrao, Jiangxi, China","award":["000000"],"award-info":[{"award-number":["000000"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>The global spread of COVID-19 has disrupted the normality of people\u2019s daily lives, leading the population to social distancing and isolation. The closure of green areas also affected the well-being of the individual during the COVID-19 pandemic. Viewing flowers is expected to have similar positive effects to viewing natural scenery. Therefore, this study investigates how white, red, and yellow flower colors affect individuals\u2019 psychological and physiological well-being. The experiment was conducted in an office-like setting with 50 participants. Participants looked at each flower color for 3 min. Electroencephalograms (EEGs), heart rate variability, and skin conductivity were measured to evaluate physiological responses along with both the semantic differential questionnaire (SD) and the Profile of Mood States (POMS) to assess psychological responses. EEGs showed that the mean values of alpha relative power in the prefrontal lobe were significantly higher when viewing yellow and red flowers vs. white flowers. Furthermore, heart rate variability revealed that viewing yellow and red flowers increased parasympathetic nerve activity significantly. After viewing the yellow and red flowers, the average results for each subscale of the POMS questionnaire improved. The vigor (V) subscale and overall mood status values were significantly improved. The results of the SD method revealed that viewing yellow and red flowers resulted in a significantly higher sense of relaxation, cheerfulness, and comfort than viewing white flowers.<\/jats:p>","DOI":"10.3390\/ijerph181910258","type":"journal-article","created":{"date-parts":[[2021,9,29]],"date-time":"2021-09-29T08:27:44Z","timestamp":1632904064000},"page":"10258","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":40,"title":["How Can Flowers and Their Colors Promote Individuals\u2019 Physiological and Psychological States during the COVID-19 Lockdown?"],"prefix":"10.3390","volume":"18","author":[{"given":"Junfang","family":"Xie","sequence":"first","affiliation":[{"name":"Department of Landscape Architecture, College of Architecture and Urban Planning, Tongji University, Shanghai 200092, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Binyi","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Landscape Architecture, College of Architecture and Urban Planning, Tongji University, Shanghai 200092, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5684-2061","authenticated-orcid":false,"given":"Mohamed","family":"Elsadek","sequence":"additional","affiliation":[{"name":"Department of Landscape Architecture, College of Architecture and Urban Planning, Tongji University, Shanghai 200092, China"},{"name":"Department of Horticulture, Faculty of Agriculture, Suez Canal University, Ismailia 41522, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,9,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"138539","DOI":"10.1016\/j.scitotenv.2020.138539","article-title":"Evaluation of the lockdowns for the SARS-CoV-2 epidemic in Italy and Spain after one month follow up","volume":"725","year":"2020","journal-title":"Sci. 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