NDLI: Evolution and expression analysis of the β-glucosidase (GLU) encoding gene subfamily in maize

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Genes & Genomics : Volume 34, Issue 1, February 2012

Genes & Genomics : Volume 33

Genes & Genomics : Volume 32

Genes & Genomics : Volume 31

Evolution and expression analysis of the β-glucosidase (GLU) encoding gene subfamily in maize

Content Provider	Springer Nature Link
Author	Zhao, Li Liu, Ting An, Xia Gu, Riliang
Copyright Year	2012
Abstract	The maize β-glucosidase (ZmGLU1) hydrolyzes cytokinin-conjugates for releasing active cytokinins and thus plays important roles in cytokinin regulatory processes. ZmGLU1 belongs to glycosyl hydrolases 1 (GH1) gene family with a large number of members, and the gene function of other homologs remains to be investigated. In this study, 47 Arabidopsis, 34 rice, 31 brachypodium, 28 sorghum and 26 maize GH1 protein sequences were collected and subsequently used to construct a phylogenetic tree by Neighbor-Joining method. ZmGLU1 together with its 7 paralogs and 4 sorghum homologs were assigned into a distinct group (named GLU subfamily) with far evolutionary distance to other GH1 members. None of the Arabidopsis, rice and brachypodium gene falling into this group indicated a recent evolutionary emergence of GLU subfamily in some Poaceae plants after the divergence of Poaceae species. Phylogeny and comparative genome analysis revealed that GLU subfamily members of maize and sorghum evolved from a common ancestor, and expanded independently in each species by several duplications after maize-sorghum split. Ka/Ks analysis showed that purifying selection played important roles in maintenance of similar functions among the maize GLU paralogs. In addition, the similar protein properties and cytokinin-dependent gene expressions further suggested the similar functions of ZmGLUs in cytokinin activation. However, the organ-dependent expression of ZmGLUs exhibited diverse patterns, which might contribute to their diverse roles in cytokinin homeostasis. Taken together, this work put new insights into the evolution and expression of ZmGLU genes, and provided the foundation for future functional investigations.
Starting Page	179
Ending Page	187
Page Count	9
File Format	PDF
ISSN	19769571
Journal	Genes & Genomics
Volume Number	34
Issue Number	2
e-ISSN	20929293
Language	English
Publisher	The Genetics Society of Korea
Publisher Date	2012-04-16
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Maize Cytokinin β-glucosidase Gene family Evolution Expression Plant Genetics & Genomics Microbial Genetics and Genomics Human Genetics Animal Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics Biochemistry Molecular Biology

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