{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T19:06:23Z","timestamp":1792695983432,"version":"4.5.0"},"reference-count":37,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,4,15]],"date-time":"2026-04-15T00:00:00Z","timestamp":1776211200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["25K22440, 23K23938, 20H05906, 19K22313, 23H04261"],"award-info":[{"award-number":["25K22440, 23K23938, 20H05906, 19K22313, 23H04261"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Plant Sci."],"abstract":"<jats:p>\n                    Plant\u2013microbe interactions strongly influence plant growth and nutrient acquisition, and their outcomes depend on nutrient availability. The root endophyte\n                    <jats:italic>Colletotrichum tofieldiae<\/jats:italic>\n                    (\n                    <jats:italic>Ct<\/jats:italic>\n                    ) promotes growth in\n                    <jats:italic>Arabidopsis thaliana<\/jats:italic>\n                    under inorganic phosphate (Pi) limitation, but its effects under Pi sufficiency and the role of salicylic acid (SA) signaling remain unclear. Here, we examined Pi-dependent growth responses, nutrient accumulation, and SA signaling in wild-type (WT) and SA-deficient\n                    <jats:italic>ics1<\/jats:italic>\n                    mutant plants co-cultivated with\n                    <jats:italic>Ct<\/jats:italic>\n                    under low, moderate, and high Pi conditions (25, 150, and 625 \u00b5M). Under low Pi,\n                    <jats:italic>Ct<\/jats:italic>\n                    significantly enhanced WT growth, increasing leaf number and root length by 41.8% and 50.5%, respectively, and promoting biomass accumulation, with fresh and dry weight increases of 104% and 232% relative to uninoculated controls. Growth promotion was reduced at moderate Pi and shifted toward growth suppression under high Pi. Elemental profiling using inductively coupled plasma mass spectrometry (ICP-MS) revealed pronounced\n                    <jats:italic>Ct<\/jats:italic>\n                    -mediated nutrient accumulation under Pi limitation. At low Pi, phosphorus content increased by 281%, accompanied by significant increases in K (70.1%), S (84.5%), and Ca (73.2%). In contrast, at moderate and high Pi,\n                    <jats:italic>Ct<\/jats:italic>\n                    consistently enhanced P accumulation, while changes in K, S, and Ca were not significant.\n                    <jats:italic>Ct<\/jats:italic>\n                    colonization induced expression of the SA-responsive marker gene\n                    <jats:italic>PR1<\/jats:italic>\n                    , particularly under low Pi. In contrast,\n                    <jats:italic>ics1<\/jats:italic>\n                    mutants failed to exhibit\n                    <jats:italic>Ct-<\/jats:italic>\n                    induced growth promotion and instead displayed growth suppression across all Pi conditions. Together, these findings demonstrate that Pi availability and ICS1-mediated SA biosynthesis jointly determine the outcome of the\n                    <jats:italic>Arabidopsis<\/jats:italic>\n                    \u2013\n                    <jats:italic>Ct<\/jats:italic>\n                    interaction.\n                  <\/jats:p>","DOI":"10.3389\/fpls.2026.1770854","type":"journal-article","created":{"date-parts":[[2026,4,15]],"date-time":"2026-04-15T05:41:42Z","timestamp":1776231702000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Salicylic acid signaling controls the colonization behavior of Colletotrichum tofieldiae in Arabidopsis thaliana"],"prefix":"10.3389","volume":"17","author":[{"given":"Norhafizah Binti","family":"Sidek","sequence":"first","affiliation":[{"name":"Department of Bioscience and Bioinformatics, Kyushu Institute of Technology","place":["Iizuka, Fukuoka, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shiho","family":"Itoh","sequence":"additional","affiliation":[{"name":"Department of Bioscience and Bioinformatics, Kyushu Institute of Technology","place":["Iizuka, Fukuoka, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Toru","family":"Aramaki","sequence":"additional","affiliation":[{"name":"Department of Bioscience and Bioinformatics, Kyushu Institute of Technology","place":["Iizuka, Fukuoka, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuji","family":"Yamasaki","sequence":"additional","affiliation":[{"name":"Arid Land Research Center, Tottori University","place":["Tottori, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hisashi","family":"Tsujimoto","sequence":"additional","affiliation":[{"name":"Arid Land Research Center, Tottori University","place":["Tottori, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kazumasa","family":"Shirai","sequence":"additional","affiliation":[{"name":"Department of Bioscience and Bioinformatics, Kyushu Institute of Technology","place":["Iizuka, Fukuoka, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kousuke","family":"Hanada","sequence":"additional","affiliation":[{"name":"Department of Bioscience and Bioinformatics, Kyushu Institute of Technology","place":["Iizuka, Fukuoka, Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,4,15]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"555","DOI":"10.1186\/s12864-016-2917-6","article-title":"Gene family expansions and contractions are associated with host range in plant pathogens of the genus Colletotrichum","volume":"17","author":"Baroncelli","year":"2016","journal-title":"BMC Genomics"},{"key":"B2","doi-asserted-by":"publisher","first-page":"395","DOI":"10.1111\/pce.13102","article-title":"The plant hormone salicylic acid interacts with the mechanism of anti-herbivory conferred by fungal endophytes in grasses","volume":"41","author":"Bastias","year":"2018","journal-title":"Plant Cell Environ."},{"key":"B3","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms14245","article-title":"Carbon translocation from a plant to an insect-pathogenic endophytic fungus","volume":"8","author":"Behie","year":"2017","journal-title":"Nat. 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