English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Background  S-adenosyl-l-homocysteine hydrolase (SAHH) is the only eukaryotic enzyme capable of S-adenosyl-l-homocysteine (SAH) catabolism for the maintenance of cellular transmethylation potential. Recently, biochemical and genetic studies in herbaceous species have obtained important discoveries in the function of  SAHH , and an extensive characterization of  SAHH  family in even one tree species is essential, but currently lacking.    Results  Here, we first identified the SAHH family from  Populus tomentosa  using molecular cloning method. Phylogenetic analyses of 28 SAHH proteins from dicotyledons, monocotyledons, and lower plants revealed that the sequences formed two monophyletic groups: the PtrSAHHA with PtoSAHHA and PtrSAHHB with PtoSAHHB. Examination of tissue-specific expression profiles of the  PtoSAHH  family revealed similar expression patterns; high levels of expression in xylem were found. Nucleotide diversity and linkage disequilibrium (LD) in the  PtoSAHH  family, sampled from  P. tomentosa  natural distribution, revealed that  PtoSAHH  harbors high single-nucleotide polymorphism (SNP) diversity(   π  =  0  .  01059  ±  0  .  00122    and    0  .  00930  ±  0  .  00079  ,   respectively    )and low LD (r 2  > 0.1, within 800 bp and 2,200 bp, respectively). Using an LD-linkage analysis approach, two noncoding SNPs ( PtoSAHHB_1065  and  PtoSAHHA_2203 ) and the corresponding haplotypes were found to significantly associate with α-cellulose content, and a nonsynonymous SNP ( PtoSAHHB_410 ) within the SAHH signature motifs showed significant association with fiber length, with an average of 3.14% of the phenotypic variance explained.    Conclusions  The present study demonstrates that  PtoSAHHs  were split off prior to the divergence of interspecies in  Populus , and  SAHHs  may play a key role promoting transmethylation reactions in the secondary cell walls biosynthesis in trees. Hence, our findings provide insights into SAHH function and evolution in woody species and also offer a theoretical basis for marker-aided selection breeding to improve the wood quality of  Populus .

bmc genomic data

Allelic variation within the S-adenosyl-L-homocysteine hydrolase gene family is associated with wood properties in Chinese white poplar (Populus tomentosa)