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Strigolactones in Rhizosphere Communication: Multiple Molecules With Diverse Functions
Yee Jia Kee1, Satoshi Ogawa2,3, Yasunori Ichihashi4
1Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Nara, 630-0192 Japan.
Plant & Cell Physiology
|June 6, 2023
Summary
Strigolactones (SLs) are plant hormones influencing the rhizosphere. Different SLs have distinct roles as signaling molecules and plant hormones, impacting plant interactions and microbial communities.
Area of Science:
- Plant Biology
- Microbiology
- Biochemistry
Background:
- Strigolactones (SLs) are root-secreted molecules with known roles in plant development and interactions.
- SLs influence parasitic plants, arbuscular mycorrhizal fungi, and plant-to-plant communication.
- The existence of diverse SL structures (canonical and non-canonical) suggests varied functions.
Approach:
- This review synthesizes recent research on strigolactone functions.
- It examines the roles of different SLs in plant-microbe and plant-plant interactions.
- The review discusses the evolution and function of D14/KAI2 receptors in SL perception.
Key Points:
- SLs act as chemoattractants for parasitic plants and signal neighboring plants.
- SLs are crucial in shaping the rhizosphere microbiome community.
- Evidence indicates distinct SLs mediate specific functions as rhizosphere signals and plant hormones.
Conclusions:
- Different strigolactones possess unique activities, challenging the notion of a single role for all SLs.
- The D14/KAI2 receptor family mediates the perception of diverse SLs, controlling downstream signaling.
- Understanding these complex interactions is key to comprehending plant-rhizosphere dynamics.
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