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Shrinking in the dark: Parallel endosymbiont genome erosions are associated with repeated host transitions to an underground life

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INSECT SCIENCE 2024年第6期31卷 1810-1821页

作者： Beasley-Hall, Perry G. Kinjo, Yukihiro Rose, Harley A. Walker, James Foster, Charles S. P. Kovacs, Toby G. L. Bourguignon, Thomas Ho, Simon Y. W. Lo, Nathan Univ Sydney Sch Life & Environm Sci Sydney NSW Australia Univ Adelaide Sch Biol Sci Adelaide SA 5000 Australia Okinawa Inst Sci & Technol Grad Univ Evolutionary Genom Unit Onna Okinawa Japan australian govt Dept Agr Water & Environm Canberra Australia Univ New South Wales Sch Comp Sci & Engn Sydney NSW Australia

Microbial symbioses have had profound impacts on the evolution of animals. Conversely, changes in host biology may impact the evolutionary trajectory of symbionts themselves. Blattabacterium cuenoti is present in almost all cockroach species and enables hosts to subsist on a nutrient-poor diet. To investigate if host biology has impacted Blattabacterium at the genomic level, we sequenced and analyzed 25 genomes from australian soil-burrowing cockroaches (Blaberidae: Panesthiinae), which have undergone at least seven separate subterranean, subsocial transitions from above-ground, wood-feeding ancestors. We find at least three independent instances of genome erosion have occurred in Blattabacterium strains exclusive to australian soil-burrowing cockroaches. These shrinkages have involved the repeated inactivation of genes involved in amino acid biosynthesis and nitrogen recycling, the core role of Blattabacterium in the host-symbiont relationship. The most drastic of these erosions have occurred in hosts thought to have transitioned underground the earliest relative to other lineages, further suggestive of a link between gene loss in Blattabacterium and the burrowing behavior of hosts. As Blattabacterium is unable to fulfill its core function in certain host lineages, these findings suggest soil-burrowing cockroaches must acquire these nutrients from novel sources. Our study represents one of the first cases, to our knowledge, of parallel host adaptations leading to concomitant parallelism in their mutualistic symbionts, further underscoring the intimate relationship between these two partners. Endosymbiotic bacteria live in the cells of other organisms. These microbes are particularly prevalent in insects, with whom they share a mutually beneficial relationship. In cockroaches, the endosymbiont Blattabacterium is vital for producing essential amino acids that hosts cannot acquire on their own. Soil-burrowing cockroaches of Australia are an interesting example in whic

关键词： Blattabacterium endosymbiosis gene loss molecular evolution parallel evolution subterranean habitats

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Refined families of Dothideomycetes:orders and families incertae sedis in Dothideomycetes

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Fungal Diversity 2020年第6期105卷 17-318页

作者： Sinang Hongsanan Kevin D.Hyde Rungtiwa Phookamsak Dhanushka N.Wanasinghe Eric H.C.McKenzie V.Venkateswara Sarma Robert Lücking Saranyaphat Boonmee Jayarama D.Bhat Ning-Guo Liu Danushka S.Tennakoon Dhandevi Pem Anuruddha Karunarathna Shu-Hua Jiang Gareth E.B.Jones Alan J.L.Phillips Ishara S.Manawasinghe Saowaluck Tibpromma Subashini C.Jayasiri Diana Sandamali Ruvishika S.Jayawardena Nalin N.Wijayawardene Anusha H.Ekanayaka Rajesh Jeewon Yong-Zhong Lu Chayanard Phukhamsakda Asha J.Dissanayake Xiang-Yu Zeng Zong-Long Luo Qing Tian Kasun M.Thambugala Dongqin Dai Milan C.Samarakoon K.W.Thilini Chethana Damien Ertz Mingkwan Doilom Jian-Kui(Jack)Liu Sergio Pérez-Ortega Ave Suija Chanokned Senwanna Subodini N.Wijesinghe Mekala Niranjan Sheng-Nan Zhang Hiran A.Ariyawansa Hong-Bo Jiang Jin-Feng Zhang Chada Norphanphoun Nimali Ide Silva Vinodhini Thiyagaraja Huang Zhang Jadson D.P.Bezerra Ricardo Miranda-González AndréAptroot Hiroyuki Kashiwadani Dulanjalee Harishchandra Emmanuël Sérusiaux Pranami DAbeywickrama Dan-Feng Bao Bandarupalli Devadatha Hai-Xia Wu Kwang Hee Moon Cecile Gueidan Felix Schumm Digvijayini Bundhun Ausana Mapook Jutamart Monkai Chitrabhanu S.Bhunjun Putarak Chomnunti Satinee Suetrong Napalai Chaiwan Monika C.Dayarathne Jing Yang Achala R.Rathnayaka Jian-Chu Xu Jiesheng Zheng Gang Liu Yao Feng Ning Xie Guangdong Provincial Key Laboratory for Plant Epigenetics Shenzhen Key Laboratory of Microbial Genetic EngineeringCollege of Life Science and OceanographyShenzhen UniversityShenzhen 518060People’s Republic of China Center of Excellence in Fungal Research Mae Fah Luang UniversityChiang Rai 57100Thailand CAS Key Laboratory for Plant Diversity and Biogeography of East Asia(KLPB) Kunming Institute of BotanyChinese Academy of ScienceKunming 650201YunnanPeople’s Republic of China East and Central Asia Regional Office World Agroforestry Centre(ICRAF)Kunming 650201YunnanPeople’s Republic of China Centre for Mountain Futures(CMF) Kunming Institute of BotanyKunming 650201YunnanPeople’s Republic of China Department of Entomology and Plant Pathology Faculty of AgricultureChiang Mai UniversityChiang Mai 50002Thailand Institute of Plant Health Zhongkai University of Agriculture and EngineeringHaizhu DistrictGuangzhou 510225People’s Republic of China World Agroforestry Centre East and Central Asia132 Lanhei RoadKunming 650201YunnanPeople’s Republic of China Manaaki Whenua-Landcare Research Private Mail Bag 92170AucklandNew Zealand Fungal Biotechnology Lab Department of BiotechnologySchool of Life SciencesPondicherry UniversityKalapetPondicherry 605014India School of Science Mae Fah Luang UniversityChiang Rai 57100Thailand Botanischer Garten und Botanisches Museum Freie Universität BerlinKönigin-Luise-Straße 6-814195 BerlinGermany 13128/1-J Azad Co-Op Housing SocietyCurcaP.O.Goa Velha 403108India Faculty of Agriculture Natural Resources and EnvironmentNaresuan UniversityPhitsanulok 65000Thailand Guizhou Key Laboratory of Agricultural Biotechnology Guizhou Academy of Agricultural SciencesGuiyang 550006People’s Republic of China School of Life Science and Technology University of Electronic Science and Technology of ChinaChengdu 611731People’s Republic of China State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101People’s Republic of C

Numerous new taxa and classifications of Dothideomycetes have been published following the last monograph of families of Dothideomycetes in 2013.A recent publication by Honsanan et *** 2020 expanded information of families in Dothideo-mycetidae and Pleosporomycetidae with modern *** this paper,we provide a refined updated document on orders and families incertae sedis of *** family is provided with an updated description,notes,including figures to represent the morphology,a list of accepted genera,and economic and ecological *** also provide phylogenetic trees for each *** this study,31 orders which consist 50 families are assigned as orders incertae sedis in Dothideomycetes,and 41 families are treated as families incertae sedis due to lack of molecular or morphological *** new order,Catinellales,and four new families,Catinellaceae,Morenoinaceae Neobuelliellaceae and Thyrinulaceae are *** genera(Neobuelliella,Pseudomicrothyrium,Flagellostrigula,Swinscowia,Macroconstrictolumina,Pseudobogoriella,and Schummia)are *** new species(Acrospermum urticae,Bogoriella complexoluminata,Dothiorella ostryae,Dyfrolomyces distoseptatus,Macroconstrictolumina megalateralis,Patellaria microspora,and Pseu-domicrothyrium thailandicum)are introduced base on morphology and phylogeny,together with two new records/reports and five new collections from different *** new combinations are also provided in this paper.

关键词： Abrothallales Ascrospermales Asterinales Botryosphaeriales Catinellales Cladoriellales Collemopsidiales Dyfrolomycetales Eremithallales Eremomycetales Jahnulales Kirschsteiniotheliales Lembosinales Lichenotheliales Microthyriales Minutisphaerales Monoblastiales Murramarangomycetales new family new genera new order new species Parmulariales Patellariales Phaeotrichales Phylogeny Stigmatodiscales Strigulales Superstratomycetales Taxonomy Trypetheliales Tubeufiales Valsariales Venturiales Zeloasperisporiales

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