Fat droplets in plant cells fight off viruses naturally
Zhou L, Wen Z, Zhong C, Zhang D, Zhang Q
Plant Signaling
The wheat and rice on your plate could one day resist devastating viral infections without farmers needing to spray more chemicals or sacrifice yield.
Plant cells contain tiny fat droplets that scientists used to think were just storage blobs for extra lipids. It turns out these droplets are actually front-line soldiers against viruses: when a virus attacks, the droplets multiply, cluster around chloroplasts, and trigger the plant's natural immune alarm system. Boosting droplet production made plants resistant to several different viruses in tobacco relatives, wheat, and rice, and remarkably, the plants didn't grow any slower for it.
Key Findings
Barley stripe mosaic virus infection significantly increased lipid droplet abundance in Nicotiana benthamiana and wheat plants
Overexpressing FIT2 or NbLDAP2.1 to boost lipid droplet formation decreased viral accumulation, while blocking droplet formation increased infection
Lipid droplets move along actin filaments to cluster around chloroplasts and confer resistance to multiple (+)ssRNA viruses and a (-)ssRNA virus via a salicylic acid-dependent pathway, with no growth penalty
chevron_right Technical Summary
Scientists discovered that fat droplets inside plant cells act as a defense system against viruses, boosting the droplets helps plants fight off infections without slowing their growth. This could lead to new ways of breeding virus-resistant crops like wheat and rice.
Abstract Preview
Original paper
Lipid droplets confer SA-dependent antiviral defense without growth penalty.
The role of lipid droplets (LDs), typically regarded as storage sites for neutral lipid, in plant defense remains poorly understood. In our study with barley stripe mosaic virus (BSMV), a (+)ssRNA ...
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