{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"institution":[{"name":"bioRxiv"}],"indexed":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T13:29:36Z","timestamp":1768483776057,"version":"3.49.0"},"posted":{"date-parts":[[2019,6,9]]},"group-title":"Plant Biology","reference-count":23,"publisher":"openRxiv","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"accepted":{"date-parts":[[2019,6,9]]},"abstract":"<jats:title>Summary<\/jats:title>\n                <jats:p>\n                  Nitric oxide (NO) is a key signaling molecule that regulates diverse biological processes in both animals and plants. In animals, NO regulates vascular wall tone, neurotransmission and immune response while in plants, NO is essential for development and responses to biotic and abiotic stresses [1\u20133]. Interestingly, NO is involved in the sexual reproduction of both animals and plants mediating physiological events related to the male gamete [2, 4]. In animals, NO stimulates sperm motility [4] and binding to the plasma membrane of oocytes [5] while in plants, NO mediates pollen-stigma interactions and pollen tube guidance [6, 7]. NO generation in pollen tubes (PTs) has been demonstrated [8] and intracellular responses to NO include cytosolic Ca\n                  <jats:sup>2+<\/jats:sup>\n                  elevation, actin organization, vesicle trafficking and cell wall deposition [7, 9]. However, the NO-responsive proteins that mediate these responses are still elusive. Here we show that PTs of\n                  <jats:italic>Arabidopsis<\/jats:italic>\n                  lacking the pollen-specific Diacylglycerol Kinase 4 (DGK4) grow slower and become insensitive to NO-dependent growth inhibition and re-orientation responses. Recombinant DGK4 protein yields NO-responsive spectral and catalytic changes\n                  <jats:italic>in vitro<\/jats:italic>\n                  which are compatible with a role in NO perception and signaling in PTs. NO is a fast, diffusible gas and, based on our results, we hypothesize it could serve in long range signaling and\/or rapid cell-cell communication functions mediated by DGK4 downstream signaling during the progamic phase of angiosperm reproduction.\n                <\/jats:p>","DOI":"10.1101\/665810","type":"posted-content","created":{"date-parts":[[2019,6,9]],"date-time":"2019-06-09T23:25:10Z","timestamp":1560122710000},"source":"Crossref","is-referenced-by-count":2,"title":["The\n                  <i>Arabidopsis<\/i>\n                  Diacylglycerol Kinase 4 is involved in nitric oxide-dependent pollen tube guidance and fertilization"],"prefix":"10.64898","author":[{"given":"Aloysius","family":"Wong","sequence":"first","affiliation":[]},{"given":"Lara","family":"Donaldson","sequence":"additional","affiliation":[]},{"given":"Maria Teresa","family":"Portes","sequence":"additional","affiliation":[]},{"given":"J\u00f6rg","family":"Eppinger","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1100-5478","authenticated-orcid":false,"given":"Jos\u00e9","family":"Feij\u00f3","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4355-4591","authenticated-orcid":false,"given":"Christoph","family":"Gehring","sequence":"additional","affiliation":[]}],"member":"54368","reference":[{"key":"2019061109593274000_665810v1.1","doi-asserted-by":"publisher","DOI":"10.1016\/S1360-1385(01)01893-3"},{"key":"2019061109593274000_665810v1.2","doi-asserted-by":"publisher","DOI":"10.1016\/j.molp.2014.12.010"},{"key":"2019061109593274000_665810v1.3","doi-asserted-by":"publisher","DOI":"10.1093\/jxb\/erz088"},{"key":"2019061109593274000_665810v1.4","doi-asserted-by":"publisher","DOI":"10.1530\/REP-10-0151"},{"key":"2019061109593274000_665810v1.5","doi-asserted-by":"publisher","DOI":"10.1016\/S0015-0282(97)00537-2"},{"key":"2019061109593274000_665810v1.6","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-8137.2006.01875.x"},{"key":"2019061109593274000_665810v1.7","doi-asserted-by":"publisher","DOI":"10.1093\/mp\/ssn034"},{"key":"2019061109593274000_665810v1.8","doi-asserted-by":"publisher","DOI":"10.1242\/dev.01153"},{"key":"2019061109593274000_665810v1.9","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-8137.2009.02820.x"},{"key":"2019061109593274000_665810v1.10","doi-asserted-by":"publisher","DOI":"10.1111\/nph.12814"},{"key":"2019061109593274000_665810v1.11","doi-asserted-by":"publisher","DOI":"10.1111\/nph.15674"},{"key":"2019061109593274000_665810v1.12","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0052436"},{"key":"2019061109593274000_665810v1.13","first-page":"621","article-title":"Novel nitric oxide-liberating heme proteins from the saliva of bloodsucking insects","volume":"36","year":"1999","journal-title":"Met. 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Meth"}],"container-title":[],"original-title":[],"link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1101\/665810","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,14]],"date-time":"2026-01-14T23:15:13Z","timestamp":1768432513000},"score":1,"resource":{"primary":{"URL":"http:\/\/biorxiv.org\/lookup\/doi\/10.1101\/665810"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,6,9]]},"references-count":23,"URL":"https:\/\/doi.org\/10.1101\/665810","relation":{"is-preprint-of":[{"id-type":"doi","id":"10.1242\/dev.183715","asserted-by":"subject"}]},"subject":[],"published":{"date-parts":[[2019,6,9]]},"subtype":"preprint"}}