Effect of 4-chloro-2-methylphenoxy acetic acid on tomato gene expression and rhizosphere bacterial communities under inoculation with phosphate-solubilizing bacteria
文献类型： 外文期刊
作者： Zhang, Jian 1 ; Guo, Tingting 1 ; Xiao, Qingqing 4 ; Wang, Pengcheng 1 ; Tian, Hongmei 1 ;
作者机构： 1.Anhui Acad Agr Sci, Inst Hort, Hefei 230031, Anhui, Peoples R China
2.Key Lab Genet Improvement & Ecophysiol Hort Crops, Hefei 230031, Anhui, Peoples R China
3.Anhui Agr Univ, Sch Life Sci, Hefei 230036, Anhui, Peoples R China
4.Hefei Univ, Sch Biol Food & Environm, Hefei 230601, Anhui, Peoples R China
关键词： Beneficial bacteria; Chemical pesticide; Horticultural crop; Plant hormones; RNA-seq technology
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）
ISSN： 0304-3894
年卷期： 2021 年 416 卷
页码：
收录情况： SCI
摘要： The herbicide 4-chloro-2-methylphenoxy acetic acid (MCPA) is widely used to control the spread of broad-leaved weeds in agricultural soils, though it remains unclear how tomato plants cope with the phytotoxic effects of MCPA at the molecular level. In this study, RNA-seq and Illumina MiSeq were used to sequence bacterial communities in tomato rhizosphere soils treated with MCPA and the phosphate-solubilizing bacterial strain N3. The results showed that MCPA induced abnormal growth of lateral roots in tomato seedlings and reduced uptake of the nutrients N, P, and K as well as the hormone (ABA and GA3) levels. Inoculation with strain N3 increased nutrient uptake by roots and increased levels of the hormones ABA, ZEA, and JA in tomato seedlings and also increased the abundance of the phyla Proteobacteria and Gemmatimonadetes in soil under MCPA treatment. GO functional groups in which differentially expressed genes (DEGs) are involved included DNA binding transcription factor activity, transcriptional regulator activity, enzyme inhibitor activity, and cell wall biogenesis. The highest numbers of DEGs are annotated to ribosome, photosynthesis, and carbon metabolism categories. Our findings provide valuable information for the application of strain N3, which is beneficial for reducing the toxic effect of MCPA on vegetable plants.
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