In a recent study, Janak Joshi and colleagues from Colorado State University investigated how the South American wild potato, Solanum chacoense M6, may withstand Pectobacterium-caused illnesses (soft rot and black leg disease).

Their findings were published in Molecular Plant-Microbe Interactions (MPMI), according to Phys.org.

In a prior study, the scientists discovered that the wild potato produces compounds called metabolites that lessen disease pathogenicity by preventing bacterial communication and halting the breakdown of plant cell walls.

In their most recent study, the authors analyzed the protein profiles of domestic and wild potatoes and found the second class of chemicals known as protease inhibitors that also reduce bacterial malignancy.

Several protease inhibitor genes’ DNAs were cloned as a result of this discovery, and the proteins they encode were purified. Joshi and colleagues tested the impact of the proteins on bacteria and discovered that these proteins alter the structure of the bacteria and lead them to strangely clump together, restrict their capacity to break down plant cells, and even impair their movement.

With their findings, the scientists want to develop new potato varieties that can fend off infections independently and for an extended period, decreasing rot waste and chemical sprays.

Durable defensive features are those that make it harder for germs to overcome this resistance. The protease inhibitors discovered in this work can help potato breeding efforts in the long term and may even have a far more immediate impact when employed as purified proteins to protect plants in the field, hopefully knocking Pectobacterium out of its pectin-producing ways for years to come.

The majority of cultivated potato cultivars today fail to fight off the pathogens like their wild ancestors, making them prone to soft rot and black leg disease, both of which are brought on by Pectobacterium species. Since specific resistance genes are currently unknown, Pectobacterium represents a danger to food security and the worldwide potato supply.