Integrated biochemical and transcriptomic analysis reveals the effects of Burkholderia sp. SRB-1 on cadmium accumulating in Chrysopogon zizanioides L. under Cd stress
文献类型： 外文期刊
作者： Liu, Huakang 1 ; Huang, Huayan 1 ; Xie, Yanluo 3 ; Liu, Yikai 1 ; Shangguan, Yuxian 2 ; Xu, Heng 1 ;
作者机构： 1.Sichuan Univ, Coll Life Sci, Key Lab Bioresource & Ecoenvironm, Minist Educ, Chengdu 610065, Sichuan, Peoples R China
2.Sichuan Acad Agr Sci, Soil & Fertilizer Inst, Chengdu 610066, Peoples R China
3.Chengdu Med Coll, Coll Pharm, Chengdu, Sichuan, Peoples R China
4.Sichuan Univ, Key Lab Environm Protect Soil Ecol Protect & Pollu, Chengdu 610065, Sichuan, Peoples R China
5.Dept Ecol & Environm Sichuan, Chengdu 610065, Sichuan, Peoples R China
6.Sichuan Univ, 24 South Sect, Yihuan Rd, Chengdu 610065, Peoples R China
关键词： Cadmium; Chrysopogon zizanioides; Plant growth promoting rhizobacteria; Transcriptomic analysis; Phytoremediation
期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.7； 五年影响因子：8.4 ）
ISSN： 0301-4797
年卷期： 2023 年 337 卷
页码：
收录情况： SCI
摘要： Application of plant growth-promoting rhizobacteria plays a vital role in enhancing phytoremediation efficiency. In this study, multiple approaches were employed to investigate the underlying mechanisms of Burkholderia sp. SRB-1 (SRB-1) on elevating Cd uptake and accumulation. Inoculation experiment indicated that SRB-1 could facilitate plant growth and Cd tolerance, as evidenced by the enhanced plant biomass and antioxidative enzymes activities. Cd content in plant shoots and roots increased about 36.56%-39.66% and 25.97%-130.47% assisted with SRB-1 when compared with control. Transcriptomics analysis revealed that SRB-1 upregulated expression of amiE, AAO1-2 and GA2-ox related to auxin and gibberellin biosynthesis in roots. Auxin and gibberellin, as hormone signals, regulated plant Cd tolerance and growth through activating hormone signal transduction pathways, which might also contribute to 67.94% increase of dry weight. The higher expression levels of ATP-binding cassette transporter subfamilies (ABCB, ABCC, ABCD and ABCG) in Chrysopogon zizanioides roots contributed to higher Cd uptake in Cd15 B (323.83 mg kg-1) than Cd15 (136.28 mg kg-1). Further, SRB-1 facilitated Cd migration from roots to shoots via upregulating the expression of Nramp, ZIP and HMA fam-ilies. Our integrative analysis provided a molecular-scale perspective on Burkholderia sp. SRB-1 contributing to C. zizanioides performance.
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