Perspectives on the metabolism of strigolactone rhizospheric signals

Jian You Wang, Justine Braguy, Guan Ting Erica Chen, Muhammad Jamil, Aparna Balakrishna, Lamis Berqdar, Salim Al-Babili*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Strigolactones (SLs) are a plant hormone regulating different processes in plant development and adjusting plant’s architecture to nutrition availability. Moreover, SLs are released by plants to communicate with beneficial fungi in the rhizosphere where they are, however, abused as chemical cues inducing seed germination of root parasitic weeds, e.g. Striga spp., and guiding them towards host plants in their vicinity. Based on their structure, SLs are divided into canonical and non-canonical SLs. In this perspective, we describe the metabolism of root-released SLs and SL pattern in rice max1-900 mutants, which are affected in the biosynthesis of canonical SLs, and show the accumulation of two putative non-canonical SLs, CL+30 and CL+14. Using max1-900 and SL-deficient d17 rice mutants, we further investigated the metabolism of non-canonical SLs and their possible biological roles. Our results show that the presence and further metabolism of canonical and non-canonical SLs are particularly important for their role in rhizospheric interactions, such as that with root parasitic plants. Hence, we proposed that the root-released SLs are mainly responsible for rhizospheric communications and have low impact on plant architecture, which makes targeted manipulation of root-released SLs an option for rhizospheric engineering.

Original languageEnglish (US)
Article number1062107
StatePublished - Nov 24 2022

Bibliographical note

Funding Information:
This work was supported by baseline funding from King Abdullah University of Science and Technology and by the Bill & Melinda Gates Foundation (grant number OPP1136424) given to SA-B.

Funding Information:
We sincerely thank the support from the members of KAUST Analytical Core Lab and the Bioactives lab. We thank Dr. Abdel Gabbar Babiker for providing Striga hermonthica seeds.

Publisher Copyright:
Copyright © 2022 Wang, Braguy, Chen, Jamil, Balakrishna, Berqdar and Al-Babili.


  • LC-MS/MS
  • rhizosphere
  • rice (Oryza sativa)
  • root exudate
  • striga
  • strigolactones

ASJC Scopus subject areas

  • Plant Science


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