Metabolomic and transcriptomic analysis of roots of tobacco varieties resistant and susceptible to bacterial wilt.

Ralstonia solanacearum severely damages the growth of tobacco (Nicotiana tabacum L.) and causes great economic losses in tobacco production. To investigate the root metabolism and transcriptional characteristics of tobacco bacterial wilt susceptible variety Cuibi-1 (CB-1) and resistant new line KCB-1 (derived from an ethyl methanesulfonate (EMS) mutant of CB-1) after infestation with R. solanacearum, root metabolism and transcriptional characteristics were investigated using RNA-Seq and liquid chromatography-mass spectrometry (LC-MS). Differences in resistance between KCB-1 and CB-1 were observed in several aspects: (1) The phenylpropanoid pathway was the main pathway of resistance to bacterial wilt in KCB-1 compared with CB-1. (2) KCB-1 had more differential metabolic markers of disease resistance than CB-1 after infection with R. solanacearum. Among them, the differential coumarin-like metabolites that affect quorum sensing (QS) and biofilm formation of R. solanacearum differ in KCB-1 and CB-1. (3) KCB-1 inhibited production of the R. solanacearum metabolite putrescine, and the level of putrescine in tobacco was positively correlated with susceptibility. (4) Compared with CB-1, the metabolites of KCB-1 had less differential nitrogen sources during the infestation of R. solanacearum, which was detrimental to the growth and reproduction of R. solanacearum. (5) Both indole-3-acetic acid (IAA) and abscisic acid (ABA) in CB-1 and KCB-1 were involved in the response to R. solanacearum infestation, but the levels of IAA and ABA in KCB-1 were greater than in CB-1 at 24 h post inoculation (hpi). In conclusion, R. solanacearum caused reprogramming of both root metabolism and transcription in KCB-1 and CB-1, and the transcriptional and metabolic characteristics of resistant tobacco were more unfavorable to R. solanacearum.

• Publication year

  2022

• Venue

  Genomics

• Publication date

  2022-08-01

• Fields of study

  Biology, Agricultural and Food Sciences, Medicine, Environmental Science

• Identifiers
  DOI 10.1016/j.ygeno.2022.110471PMID 36055574
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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