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Strigolactones, ROS and ABA Regulate Systemic Salt-Tolerance Priming Signals Between Dodder-Connected Tobacco Plants.

Xijie Zheng1,2, Jingxiong Zhang1,2, Man Zhao1,2

  • 1Department of Economic Plants and Biotechnology, Yunnan Key Laboratory for Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China.

Plant, Cell & Environment
|February 21, 2025
PubMed
Summary
This summary is machine-generated.

Dodder parasitic plants transfer salt stress tolerance signals between hosts. Strigolactone, reactive oxygen species, and abscisic acid pathways in the signal donor plant regulate this interplant communication.

Keywords:
abscisic aciddodderreactive oxygen speciessalt stressstrigolactonessystemic signals

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Area of Science:

  • Plant Biology
  • Ecology
  • Molecular Biology

Background:

  • Parasitic dodder plants connect multiple hosts, enabling interplant communication.
  • Salt stress can induce systemic priming signals transferred via dodder, enhancing recipient plant tolerance.
  • The precise signaling pathways governing this dodder-mediated interplant priming remain largely unknown.

Purpose of the Study:

  • To elucidate the molecular mechanisms regulating signal transfer in dodder-connected plants under salt stress.
  • To identify key plant pathways involved in the systemic priming response mediated by dodder.

Main Methods:

  • Genetic analyses in dodder-connected tobacco (Nicotiana tabacum) clusters.
  • Transcriptome analysis to identify affected signaling pathways.
  • Quantification of phytohormone and reactive oxygen species levels.

Main Results:

  • Strigolactone (SL), reactive oxygen species (ROS), and abscisic acid (ABA) pathways in the signal donor (SD) negatively control interplant priming signals.
  • SLs in SD plants appear to influence ABA and ROS pathways in signal receiver (SR) plants.
  • SL and ROS signaling converge on the ABA pathway in SD plants to regulate priming signals.

Conclusions:

  • Phytohormones (SL, ABA) and ROS play crucial regulatory roles in dodder-mediated interplant communication.
  • This study provides novel insights into systemic signaling and salt stress adaptation through interplant priming.