{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T17:53:03Z","timestamp":1785433983665,"version":"3.56.0"},"reference-count":29,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2026,4,2]],"date-time":"2026-04-02T00:00:00Z","timestamp":1775088000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Software AG Stiftung, Darmstadt"},{"id":[{"id":"https:\/\/ror.org\/05vbfxw79","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Hasler Stiftung Bern"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biomimetics"],"abstract":"<jats:p>We present a bio-hybrid sensing system that uses a living plant (Tradescantia pallida) as an ambient biosensor for human stress states as a single-participant proof-of-concept study. An AD8232 biosignal amplifier captures plant bioelectric activity, while a Happimeter smartwatch simultaneously measures the wearer\u2019s mood via machine learning on wrist-worn sensor data. Over 129 paired observations across eleven days in a naturalistic desk-work setting, a within-day fixed-effects analysis reveals robust stress\u2013plant coupling: seven correlations survive Benjamini\u2013Hochberg false discovery rate correction (q = 0.05), with two also surviving Bonferroni correction. The strongest results are stress_rolling vs. plant mean (r = +0.36, p = 3.3 \u00d7 10\u22125) and RMS (r = +0.34, p = 7.8 \u00d7 10\u22125). An incidental electrode reattachment mid-experiment created a natural control: mean\/RMS correlation signs flipped with electrode polarity, while the coefficient of variation remained consistently negative across both configurations (r = \u22120.32, p = 2.6 \u00d7 10\u22124). This electrode-invariant finding\u2014higher stress associated with lower relative signal variability\u2014provides the strongest evidence for genuine bio-hybrid sensing. The results position living plants as bio-inspired ambient sensing elements for workplace wellbeing monitoring.<\/jats:p>","DOI":"10.3390\/biomimetics11040236","type":"journal-article","created":{"date-parts":[[2026,4,2]],"date-time":"2026-04-02T07:57:55Z","timestamp":1775116675000},"page":"236","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Silent Signals: Correlating Plant Bioelectric Activity with Human Emotional States via Wearable Sensing"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7271-3224","authenticated-orcid":false,"given":"Peter A.","family":"Gloor","sequence":"first","affiliation":[{"name":"MIT System Design Management, Massachusetts Institute of Technology, Cambridge, MA 02139, USA"},{"name":"Cologne Institute of Information Science, University of Cologne, 50923 Cologne, Germany"},{"name":"Galaxyadvisors AG, 5000 Aarau, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,4,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Baluska, F., Mancuso, S., and Volkmann, D. 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