I don’t know beans about coffee, but someone else does

Some years ago, goaded on by some of my high school buddies, I wrote a letter to the editor at the National Enquirer in response to a story about a clothing store owner in Canada named Stanley Plomish, who claimed he was from the planet Venus. In a nutshell, my letter said this man was a fraud because I was from Venus and, to quote myself, “I never heard of any Plomish family.”  Well, they printed my letter and when you read the next sentence you probably will be convinced I knew what I was talking about. I can live without coffee.

With the number of coffee corners around this country in particular, I have the feeling I must be one of five people on the planet who can take or leave this ubiquitous beverage. Now, I do appreciate a good cup of Joe, but I have never craved it or needed it to wake up in the morning as so many people do. Not that there’s anything wrong with a wake-up jolt. It’s just that I can’t really identify with coffee-lovers in general. I can, however, appreciate what yesterday’s ACS Weekly PressPac had to say about what some imaginative chemists in Brazil have been doing with unroasted coffee beans.

The scientists are reporting for the first time that these beans contain proteins that can kill insects and might be developed into new insecticides for protecting food crops against destructive pests. Their study, which suggests a new use for one of the most important tropical crops in the world, appears in ACS’ Journal of Agricultural and Food Chemistry, a bi-weekly publication.

Peas, beans and some other plant seeds contain proteins, called globulins, which ward off insects. Coffee beans contain large amounts of globulins, and Paulo Mazzafera and colleagues wondered whether those coffee proteins might also have an insecticidal effect. The high heat of roasting destroys globulins, so that they do not appear in brewed coffee.

Their tests against cowpea weevil larva, insects used as models for studying the insecticidal activity of proteins, showed that tiny amounts of the coffee proteins quickly killed up to half of the insects. In the future, scientists could insert genes for these insect-killing proteins into important food crops, such as grains, so that plants produce their own insecticides, the researchers suggest. The proteins appear harmless to people.

To read more about this innovation, go to beans. 

Image courtesy of Fernando Rebelo, Wikimedia Commons