New species and new synonyms of Macromotettixoides (Orthoptera: Tetrigidae) with an updated key
ZOOTAXA
Authors: Deng, Wei-An; Xin, Lei; Zhang, Rong-Jiao; Huang, Chao-Mei; Xu, Hai-Qing; Tan, Liu-Su; Huang, Su-Qin
Abstract
The genus Macromotettixoides Zheng, Wei & Jiang, 2005 is reviewed. Four new species of the genus, M. daiyunshanensis Deng, sp. nov., M. curvicarina Deng, sp. nov., M. convexa Deng, sp. nov. and M. shengtangshanensis Deng, sp. nov. are described with detailed illustrations of external morphology. Two new synonyms are established: M. jinggangshanensis, syn. nov. is synonymized with M. jiuwanshanensis Zheng, Wei & Jiang, 2005; M. parvula Zha & Wen, 2017, syn. nov. is synonymized with M. undulatifemura Deng, Zheng & Yang, 2012. Additionally, an updated key to species of the genus is given.
SERKgenes identification and expression analysis during somatic embryogenesis and sporogenesis of sexual and apomicticBrachiaria brizantha(Syn.Urochloa brizantha)
PLANTA
Authors: Koehler, Andrea D.; Irsigler, Andre S. T.; Carneiro, Vera T. C.; Cabral, Glaucia B.; Rodrigues, Julio C. M.; Gomes, Ana Cristina M. M.; Togawa, Roberto C.; Costa, Marcos M. C.; Martinelli, Adriana Pinheiro; Dusi, Diva Maria de Alencar
Abstract
Main conclusion InBrachiaria brizantha BbrizSERK1,BbrizSERK2andBbrizSERK3were identified.SERKexpression marks somatic embryogenesis, sexual MMC, and sexual and apomictic PMC.BbrizSERK3might have a regulatory role in reproductive development. Somatic embryogenesis receptor-like kinase(SERK) consists of plasma membrane receptor genes that have been characterized in various species, associated with several aspects of plant development, including reproduction.SERKgenes are involved in anther development and in early embryo development in sexual and asexual seed formation. To comprehend the complexity of theSERKgenes and their function inBrachiariareproduction, we performed a homology-based search in a genomic database of a sexualB. brizanthaand identified sequences of threeSERKgenes,BbrizSERK1,BbrizSERK2, andBbrizSERK3. RNASeq data showed equivalent abundance ofBbrizSERK1andBbrizSERK2transcripts in ovaries at early megasporogenesis of sexuals and apomicts, whileBbrizSERK3transcripts were more abundant in ovaries of sexuals than in apomicts.BbrizSERK3results in three coding sequences due to alternative splicing, among them Variant 1 results in a protein with all the predicted domains of a SERK.BbrizSERKtranscripts were detected in male reproductive tissues of both sexual and apomictic plants, suggesting a role in controlling anther development.BbrizSERKtranscripts were detected early in ovule development, in the integuments, and in the megaspore mother cell of the sexual plant, but not in the cells that give rise to apomictic embryo sacs, suggesting a role in female reproductive development of sexuals. This paper provides evidences thatSERKgenes plays a role in the onset and establishment of somatic embryogenesis and in the reproductive development ofB. brizanthaand suggests a distinct role ofBbrizSERKin apomixis initiation.
COA
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