Genome-Wide Identification ofbZIPFamily Genes Involved in Drought and Heat Stresses in Strawberry (Fragaria vesca)

Abstract

Basic leucine zipper (bZIP) genes are known to play a crucial role in response to various processes in plant as well as abiotic or biotic stress challenges. We have performed an identification and characterization of 50 bZIP genes across the woodland strawberry (Fragaria vesca) genome, which were divided into 10 clades according to the phylogenetic relationship of the strawberry bZIP proteins with those in Arabidopsis and rice. Five categories of intron patterns were observed within basic and hinge regions of the bZIP domains. Some additional conserved motifs have been found with the group specificity. Further, we predicted DNA-binding specificity of the basic and hinge regions as well as dimerization properties of leucine zipper regions, which was consistent with our phylogenetic clade and classified into 20 subfamilies. Across the different developmental stages of 15 organs and two types of fruits, the clade A bZIP members showed different tissue-specific expression patterns and the duplicated genes were differentially regulated, indicating a functional diversification coupled with the expansion of this gene family in strawberry. Under normal growth conditions, mrna11837 and mrna30280 of clade A showed very weak expression levels in organs and fruits, respectively; but higher expression was observed with different set of genes following drought and heat treatment, which may be caused by the separate response pathway between drought and heat treatments.

The bZIP gene family in watermelon: genome-wide identification and expression analysis under cold stress and root-knot nematode infection

“…The number is comparable to that of some dicot plants, such as cucumber (64 members) (Baloglu et al, 2014), tomato (69 members) (Li et al, 2015a), Arabidopsis (78 members) (Dröge-Laser et al, 2018), and cassava (77 members) (Hu et al, 2016c), but smaller than that of monocot plants, such as rice (89 members) (Nijhawan et al, 2008), barley (89 members) (Pourabed et al, 2015), and Brachypodium distachyon (96 members) (Liu & Chu, 2015). Previous reports have also shown that bZIP genes are associated with the evolution of plants, and eudicot bZIP genes have a lower frequency of evolution than those of monocots after divergence (Li et al, 2015b; Wang et al, 2011, 2017). In addition, 14 segmental duplication events were detected in watermelon genome (Fig.…”

Genome-Wide Identification, Evolutionary Patterns, and Expression Analysis of bZIP Gene Family in Olive (Olea europaea L.)

“…Another difference is that in the olive, the frequency of Asn at the a position was the highest in the L 2 heptad, followed by the L 4 heptad, while in [31] Arabidopsis [51] and strawberry [34], the frequency of Asn in the a position was highest in the L 2 heptad, followed by the L 5 heptad. Therefore, it was shown that the bZIPs in olive are more prone to heterodimerization, and the length of Leu zipper is shorter compared to soybean [31], Arabidopsis [51], and strawberry [34].…”

“…Although the bZIP family has been widely studied in many plants, including Arabidopsis thaliana (Arabidopsis) [22], Oryza sativa L. (rice) [29], Sesamum indicum (sesame) [30], Glycine max (soybean) [31], Vitis vinifera L. (grape) [32], Ricinus communis L. (castor bean), Manihot esculenta (cassava) [33], Fragaria vesca (strawberry) [34], Malus domestica (apple) [35], and Brassica napus (rape) [36], there is still not enough information about it in olive. The genome of the olive was sequenced recently [37]; genome-wide data are available in the Olive Database (http://olivegenome.org).…”

Analysis of bZIP Transcription Factor Family and Their Expressions under Salt Stress in Chlamydomonas reinhardtii

“…Such variance in intron-exon structures was also found in bZIP genes of rice ( Oryza sativa ), soybean ( Glycine max ), and strawberry ( Fragaria ananassa ) plants. Among the OsbZIP genes having introns, the number of introns in open reading frames (ORF) varied from 1–12, 1–18, and 1–20 in rice [ 41 ], soybean [ 42 ], and strawberry plants [ 43 ], respectively. In agreement with these previous findings, this diversity in exon-intron organization indicated that both exon loss and gain occurred during the evolution of the C. reinhardtii bZIP gene family.…”