Bacteria living inside turmeric plants fight off deadly wilt disease
Haewou N, Khwanbua E, Khaengraeng C, Kuncharoen N, Kasem S
Soil Health
If you grow turmeric or ginger and have watched a plant wilt and die seemingly overnight, the culprit is often this same bacterial wilt pathogen, and this research points toward a future where a simple microbial inoculant could protect your plants instead of losing them.
Turmeric plants get attacked by a nasty bacterial disease that causes wilting and can wipe out entire fields. Scientists found that bacteria living inside the plant's tissues, not just around its roots, are much better at suppressing this disease than soil bacteria alone. Three specific bacterial species found living inside healthy turmeric plants reduced the disease-causing pathogen's population by 100-fold when tested on real plants.
Key Findings
Rhizosphere (root-zone) bacterial communities varied strongly by geographic location, while endosphere (inside-tissue) communities stayed relatively stable across different field sites
The endosphere core microbiome was dominated by Enterobacter and Pseudomonas, while rhizosphere communities included Bacillus and Rhizobium-group bacteria
Only endosphere-derived bacteria (Chryseobacterium gleum, Pseudomonas laurentiana, and a Pantoea species), not rhizosphere isolates, achieved a two-log (100-fold) reduction in pathogen populations in living plants
chevron_right Technical Summary
Turmeric plants harbor bacteria living inside their tissues that can fight off the bacterial wilt disease decimating crops, and a specific trio of these internal microbes cut pathogen levels by a hundredfold in test plants.
Abstract Preview
Original paper
Compartment-Specific Bacterial Communities in Turmeric and Their Association with Suppression of Ralstonia pseudosolanacearum.
Bacterial wilt caused by Ralstonia pseudosolanacearum poses a significant threat to turmeric (Curcuma longa) production in many growing regions. Although plant-associated microbial communities may ...
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Turmeric, or Curcuma longa, is a flowering plant in the ginger family Zingiberaceae. It is a perennial, rhizomatous, herbaceous plant native to the Indian subcontinent and Southeast Asia that requires temperatures between 20 and 30 °C and high annual rainfall to thrive. Plants are gathered each y...