PMID- 31799778 OWN - NLM STAT- MEDLINE DCOM- 20201102 LR - 20231111 IS - 1467-7652 (Electronic) IS - 1467-7644 (Print) IS - 1467-7644 (Linking) VI - 18 IP - 6 DP - 2020 Jun TI - Overexpression of a developing xylem cDNA library in transgenic poplar generates high mutation rate specific to wood formation. PG - 1434-1443 LID - 10.1111/pbi.13309 [doi] AB - We investigated feasibility of the Full-length complementary DNA OvereXpression (FOX) system as a mutagenesis approach in poplar, using developing xylem tissue. The main goal was to assess the overall mutation rate and if the system will increase instances of mutants affected in traits linked to the xylem tissue. Indeed, we found a high mutation rate of 17.7%, whereas 80% of all mutants were significantly affected in cellulose, lignin and/or hemicellulose. Cell wall biosynthesis is a major process occurring during xylem development. Enrichment of mutants affected in cell wall composition suggests that the tissue source for the FOX library influenced the occurrence of mutants affected in a trait linked to this tissue. Additionally, we found that FLcDNAs from mutants affected in cell wall composition were homologous to genes known to be involved in cell wall biosynthesis and most recovered FLcDNAs corresponded to genes whose native expression was highest in xylem. We characterized in detail a mutant line with increased diameter. The phenotype was caused by a poplar homolog of LONELY GUY 1 (LOG1), which encodes an enzyme in cytokinin biosynthesis and significantly increased xylem proliferation. The causative role of LOG1 in the observed phenotype was further reaffirmed by elevated cytokinin concentration in the mutant and recapitulation overexpression experiment wherein multiple independent lines phenocopied the original FOX mutant. Our experiments show that the FOX approach can be efficiently used for gene discovery and molecular interrogation of traits specific to woody perennial growth and development. CI - (c) 2019 The Authors. Plant Biotechnology Journal published by Society for Experimental Biology and The Association of Applied Biologists and John Wiley & Sons Ltd. FAU - Rauschendorfer, James AU - Rauschendorfer J AUID- ORCID: 0000-0002-1360-9419 AD - College of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI, USA. FAU - Yordanov, Yordan AU - Yordanov Y AUID- ORCID: 0000-0002-9371-2095 AD - Department of Biology, Eastern Illinois University, Charleston, IL, USA. FAU - Dobrev, Petre AU - Dobrev P AUID- ORCID: 0000-0001-7412-6982 AD - Institute of Experimental Botany, Czech Academy of Sciences, Prague, Czech Republic. FAU - Vankova, Radomira AU - Vankova R AUID- ORCID: 0000-0001-9101-8844 AD - Institute of Experimental Botany, Czech Academy of Sciences, Prague, Czech Republic. FAU - Sykes, Robert AU - Sykes R AUID- ORCID: 0000-0002-2061-6625 AD - Nuclear Materials Science, Los Alamos National Laboratory, Los Alamos, NM, USA. FAU - Kulheim, Carsten AU - Kulheim C AUID- ORCID: 0000-0002-0798-3324 AD - College of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI, USA. FAU - Busov, Victor AU - Busov V AUID- ORCID: 0000-0003-2344-1581 AD - College of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI, USA. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20191225 PL - England TA - Plant Biotechnol J JT - Plant biotechnology journal JID - 101201889 RN - 0 (Plant Proteins) RN - 9005-53-2 (Lignin) SB - IM MH - Cell Wall/genetics/metabolism MH - Gene Expression Regulation, Plant/genetics MH - Gene Library MH - Lignin/metabolism MH - Mutation Rate MH - Plant Proteins/genetics/metabolism MH - *Populus/genetics/metabolism MH - *Wood/genetics/metabolism MH - Xylem/genetics/metabolism PMC - PMC7207001 OTO - NOTNLM OT - fox hunting system OT - genetics OT - poplar COIS- The authors declare no conflicts of interest. EDAT- 2019/12/05 06:00 MHDA- 2020/11/03 06:00 PMCR- 2020/05/08 CRDT- 2019/12/05 06:00 PHST- 2019/07/24 00:00 [received] PHST- 2019/12/16 00:00 [revised] PHST- 2019/11/18 00:00 [accepted] PHST- 2019/12/05 06:00 [pubmed] PHST- 2020/11/03 06:00 [medline] PHST- 2019/12/05 06:00 [entrez] PHST- 2020/05/08 00:00 [pmc-release] AID - PBI13309 [pii] AID - 10.1111/pbi.13309 [doi] PST - ppublish SO - Plant Biotechnol J. 2020 Jun;18(6):1434-1443. doi: 10.1111/pbi.13309. Epub 2019 Dec 25.