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Oil palm cultivation requires large amounts of mineral nutrients supplied through fertilization, representing a major production cost. Among essential nutrients, potassium (K\u207a) plays a critical role in plant growth and fruit development. However, the mechanisms underlying K\u207a transport and its relationship with yield remain poorly understood. Here, we identified and characterized\n                    <jats:italic>EgKT2-1<\/jats:italic>\n                    , a Shaker-like potassium channel belonging to the AKT2-like subfamily. Quantitative PCR analyses showed that\n                    <jats:italic>EgKT2-1<\/jats:italic>\n                    is expressed in leaves, meristem, and during early fruit development, with higher transcript abundance during early fruit development coinciding with increased K\u207a accumulation. In situ hybridization localized\n                    <jats:italic>EgKT2-1<\/jats:italic>\n                    transcripts to the root cortex and phloem tissues, leaf palisade parenchyma, and mesocarp cells during early fruit development. These expression patterns are consistent with a potential contribution of\n                    <jats:italic>EgKT2-1<\/jats:italic>\n                    to K\u207a transport and allocation between source and sink tissues. Although sequence similarity places\n                    <jats:italic>EgKT2-1<\/jats:italic>\n                    within the weakly rectifying AKT2-like subfamily, electrophysiological characterization in\n                    <jats:italic>Xenopus laevis<\/jats:italic>\n                    oocytes revealed inwardly rectifying channel activity, suggesting a potential role in K\u207a uptake.\n                    <jats:italic>EgKT2-1<\/jats:italic>\n                    expression was higher in an oil palm progeny C3 which exhibited greater K\u207a allocation to aerial organs and greater oil yield. Together, these findings identify EgKT2-1 as an inwardly rectifying K\u207a channel potentially involved in K\u207a transport and redistribution during oil palm development and suggest a correlation between\n                    <jats:italic>EgKT2-1<\/jats:italic>\n                    expression, K\u207a allocation, and oil yield variation.\n                  <\/jats:p>","DOI":"10.1007\/s00299-026-03975-7","type":"journal-article","created":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T04:03:42Z","timestamp":1790741022000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["EgKT2-1, an inwardly rectifying Shaker-type potassium channel in oil palm that correlates with oil yield"],"prefix":"10.1007","volume":"45","author":[{"given":"Houssein","family":"Monder","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sandra","family":"Espeout","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sabine D.","family":"Zimmermann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Norbert","family":"Billotte","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jean-Luc","family":"Verdeil","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"St\u00e9phanie","family":"Bocs","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jean","family":"Ollivier","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Reinout","family":"Impens","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Florence","family":"Jacob","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Isabelle","family":"Gaillard","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3522-5053","authenticated-orcid":false,"given":"Teresa","family":"Cu\u00e9llar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,9,30]]},"reference":[{"key":"3975_CR1","doi-asserted-by":"publisher","first-page":"853","DOI":"10.1007\/s00425-007-0662-4","volume":"227","author":"L Alemanno","year":"2008","unstructured":"Alemanno L, Devic M, Niemenak N et al (2008) Characterization of leafy cotyledon1-like during embryogenesis in Theobroma cacao L. 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