Mitochondrial genome and diverse inheritance patterns in Pleurotus pulmonarius

Li-Yun Ye+; You-Jin Deng+; Irum Mukhtar; Guo-Liang Meng; Yan-Jiao Song; Bing Cheng; Jin-bing Hao; Xiao-Ping Wu

doi:10.1007/s12275-020-9318-x

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Mitochondrial genome and diverse inheritance patterns in Pleurotus pulmonarius: Li-Yun Ye+ , You-Jin Deng+ , Irum Mukhtar , Guo-Liang Meng , Yan-Jiao Song , Bing Cheng , Jin-bing Hao , Xiao-Ping Wu; Journal of Microbiology 2020;58(2):142-152.
DOI: https://doi.org/10.1007/s12275-020-9318-x
Published online: January 29, 2020

Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. ChinaMycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. China

Corresponding author: Xiao-Ping Wu , Tel: -,

Received: 25 June 2019 • Revised: 26 September 2019 • Accepted: 29 November 2019

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Abstract

Pleurotus pulmonarius, a member of the Pleurotaceae family in Basidiomycota, is an edible, economically important mushroom in most Asian countries. In this study, the complete mitochondrial genomes (mtDNA) of three P. pulmonarius strains – two monokaryotic commercial (J1-13 and ZA3) and one wild (X1-15) – were sequenced and analyzed. In ZA3 and X1-15, the mtDNA molecule was found to be a single circle of 68,305 bp and 73,435 bp, respectively. Both strains contain 14 core protein-coding genes and two ribosomal RNA (rRNA) subunit genes. The ZA3 strain has 22 transfer RNA (tRNA) genes and nine introns: eight in cytochrome c oxidase subunit 1 (cox1), and one in the rRNA large subunit (rnl). Monokaryotic J1-13 and ZA3 mtDNAs were found to be similar in their structure. However, the wild strain X1-15 contains 25 tRNA genes and only seven introns in cox1. Open reading frames (ORFs) of ZA3/J1-13 and X1-15 encode LAGLIDADG, ribosomal protein S3, and DNA polymerase II. In addition, mtDNA inheritance in J1-13, ZA3, and X1-15 was also studied.
Results
showed that the mtDNA inheritance pattern was uniparental and closely related to dikaryotic hyphal location with respect to the parent. Results also show that mtDNA inheritance is influenced by both the parental nuclear genome and mitogenome in the zone of contact between two compatible parents. In summary, this analysis provides valuable information and a basis for further studies to improve our understanding of the inheritance of fungal mtDNA.

Keywords: Pleurotus pulmonarius;mtDNA;uniparental inheritance

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Mitochondrial genome and diverse inheritance patterns in Pleurotus pulmonarius

J. Microbiol. 2020;58(2):142-152. Published online January 29, 2020

DOI: https://doi.org/10.1007/s12275-020-9318-x

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