PMID- 27454126 OWN - NLM STAT- MEDLINE DCOM- 20170724 LR - 20220321 IS - 1932-6203 (Electronic) IS - 1932-6203 (Linking) VI - 11 IP - 7 DP - 2016 TI - Acridine Orange Indicates Early Oxidation of Wood Cell Walls by Fungi. PG - e0159715 LID - 10.1371/journal.pone.0159715 [doi] LID - e0159715 AB - Colonization of wood blocks by brown and white rot fungi rapidly resulted in detectable wood oxidation, as shown by a reduced phloroglucinol response, a loss of autofluorescence, and acridine orange (AO) staining. This last approach is shown to provide a novel method for identifying wood oxidation. When lignin was mildly oxidized, the association between AO and lignin was reduced such that stained wood sections emitted less green light during fluorescence microscopy. This change was detectable after less than a week, an interval that past work has shown to be too short for significant delignification of wood. Although fungal hyphae were observed in only a few wood lumina, oxidation was widespread, appearing relatively uniform over regions several hundred micrometers from the hyphae. This observation suggests that both classes of fungi release low molecular weight mild oxidants during the first few days of colonization. FAU - Houtman, Carl J AU - Houtman CJ AD - USDA Forest Service, Forest Products Laboratory, One Gifford Pinchot Drive, Madison, Wisconsin, United States of America. FAU - Kitin, Peter AU - Kitin P AD - Department of Bacteriology, University of Wisconsin, Madison, Wisconsin, United States of America. FAU - Houtman, Jon C D AU - Houtman JC AD - Department of Microbiology, University of Iowa, Iowa City, Iowa, United States of America. FAU - Hammel, Kenneth E AU - Hammel KE AD - USDA Forest Service, Forest Products Laboratory, One Gifford Pinchot Drive, Madison, Wisconsin, United States of America. AD - Department of Bacteriology, University of Wisconsin, Madison, Wisconsin, United States of America. FAU - Hunt, Christopher G AU - Hunt CG AD - USDA Forest Service, Forest Products Laboratory, One Gifford Pinchot Drive, Madison, Wisconsin, United States of America. LA - eng PT - Journal Article DEP - 20160725 PL - United States TA - PLoS One JT - PloS one JID - 101285081 RN - F30N4O6XVV (Acridine Orange) SB - IM MH - Acridine Orange/*metabolism MH - Cell Wall/*metabolism/*microbiology MH - *Fungi MH - *Oxidation-Reduction MH - Wood/*metabolism/*microbiology PMC - PMC4959780 COIS- Competing Interests: The authors have declared that no competing interests exist. EDAT- 2016/07/28 06:00 MHDA- 2017/07/25 06:00 PMCR- 2016/07/25 CRDT- 2016/07/26 06:00 PHST- 2016/02/05 00:00 [received] PHST- 2016/07/06 00:00 [accepted] PHST- 2016/07/26 06:00 [entrez] PHST- 2016/07/28 06:00 [pubmed] PHST- 2017/07/25 06:00 [medline] PHST- 2016/07/25 00:00 [pmc-release] AID - PONE-D-16-05352 [pii] AID - 10.1371/journal.pone.0159715 [doi] PST - epublish SO - PLoS One. 2016 Jul 25;11(7):e0159715. doi: 10.1371/journal.pone.0159715. eCollection 2016.