BMC Genomics：中科院上海辰山中心科研人员植物抗逆与分子进化研

摘要 : 3月22、24日，国际知名学术期刊BMC Genomics连续发表了上海辰山植物园(中科院上海辰山植物科学研究中心)植物抗逆与分子进化研究组有关MAPK信号传导途径和bZIP转录因子基因家族分子进化方面的研究论文

3月22、24日，国际知名学术期刊BMC Genomics连续发表了上海辰山植物园(中科院上海辰山植物科学研究中心)植物抗逆与分子进化研究组有关MAPK信号传导途径和bZIP转录因子基因家族分子进化方面的研究论文。MAPK信号传导途径和bZIP转录因子都是从单细胞到多细胞生物在进化过程中保守的基因家族，在植物多重抗逆方面发挥非常重要的作用，两篇论文短期内都获得较高访问量。

植物抗逆与分子进化研究组主要从事草种种质资源创新相关的研究。围绕MAPK信号转导与植物多重抗逆，研究从单细胞真核生物到多细胞高等植物在进化过程中保守的应对多重逆境的响应、信号转导和耐受机理。发掘和收集极端生境植物基因资源(主要集中禾本科植物)，利用抗多重非生物胁迫基因的单细胞筛选平台，筛选在进化过程中保守的多重抗逆基因(重点筛选与MAPK信号转导途径相关的多重抗逆基因)，建立遗传转化研究体系，并研究抗逆基因在植物耐受极端生境中的作用机理，最终培育出抗逆性强，高耐受及高富集重金属等的草种，以期在环境修复中加以应用。

原文链接：

Genome-wide evolutionary characterization and analysis of bZIP transcription factors and their expression profiles in response to multiple abiotic stresses in Brachypodium distachyon

原文摘要：

Plant basic leucine zipper (bZIP) transcription factors are one of the largest and most diverse gene families and play key roles in regulating diverse stress processes.Brachypodium distachyon is emerging as a widely recognized model plant for the temperate grass family and the herbaceous energy crops, however there is no comprehensive analysis of bZIPs in B. distachyon, especially those involved in stress tolerances.

In this study, 96 bZIP genes (BdbZIPs) were identified distributing unevenly on each chromosome of B. distachyon, and most of them were scattered in the low CpG content regions. Gene duplications were widespread throughout B. distachyon genome. evolutionary comparisons suggested B. distachyon and rice’s bZIPs had the similar evolutionary patterns. The exon splicing in BdbZIP motifs were more complex and diverse than those in other plant species. We further revealed the potential close relationships between BdbZIP gene expressions and items including gene structure, exon splicing pattern and dimerization features. In addition, multiple stresses expression profile demonstrated that BdbZIPs exhibited significant expression patterns responding to 14 stresses, and those responding to heavy metal treatments showed opposite expression pattern comparing to the treatments of environmental factors and phytohormones. We also screened certain up- and down-regulated BdbZIP genes with fold changes ≥2, which were more sensitive to abiotic stress conditions.

BdbZIP genes behaved diverse functional characters and showed discrepant and some regular expression patterns in response to abiotic stresses. Comprehensive analysis indicated these BdbZIPs’ expressions were associated not only with gene structure, exon splicing pattern and dimerization feature, but also with abiotic stress treatments. It is possible that our findings are crucial for revealing the potentialities of utilizing these candidate BdbZIPs to improve productivity of grass plants and cereal crops.

文章链接：

1、http://www.biomedcentral.com/1471-2164/16/227

2、http://www.biomedcentral.com/1471-2164/16/228/abstract

作者：Xiang Liu

;