A dangerous fungus is spreading across the world's farmland, and it is putting an important part of our food supply at risk. The disease attacks three of the most widely grown crops on Earth: rice, wheat and barley. Together, these grains feed billions of people every day. In recent years, the infection has appeared in more countries, and warmer weather caused by climate change is helping it move into new areas. Farmers often lose a large part of their harvest, which pushes food prices up and makes life harder for poor families.
Now, scientists may have found a new way to fight back. In a recent study, a team of researchers built a special type of plant immune receptor — a tiny sensor that helps a plant notice when it is under attack. Normally, a plant's natural defenses can only recognize one or two specific enemies, so it is easy for a new type of fungus to slip past them. The team changed the receptor so that it could detect several different fungal threats at the same time.
The idea is similar to a lock that can be opened by many different keys. When the receptor meets a chemical signal from the fungus, it starts a chain reaction inside the plant. The plant then produces defensive chemicals and strengthens its cell walls, making it much harder for the disease to spread. In laboratory tests, plants with the new receptor stayed healthy even when they were exposed to more than one kind of infection.
The discovery is still at an early stage, and it will take years of testing before farmers can use it. However, the scientists believe the method could eventually lead to crops with strong and long-lasting resistance. This matters because the world's population keeps growing, while farmland is limited and the climate is becoming less predictable.
Experts say the research also shows how important basic science is. If the technology works in real fields, it could protect harvests, lower food prices, and give farmers in developing countries a better chance to feed their communities.
| 单词 | 英文释义 | 例句 |
|---|---|---|
| threaten/ˈθretn/ v. | to be likely to harm or damage someone or something | Climate change threatens food production in many developing countries. |
| supply/səˈplaɪ/ n. | the amount of something that is available to be used | A bad harvest can reduce the supply of rice and push prices up. |
| harvest/ˈhɑːvɪst/ n. | the crops that farmers collect from their fields | Farmers in the region lost half of their harvest because of the disease. |
| immune/ɪˈmjuːn/ adj. | connected with the body's or a plant's ability to protect itself against disease | The plant's immune system can recognize only a few kinds of infection. |
| detect/dɪˈtekt/ v. | to notice or discover something that is not easy to see | The new sensor can detect several kinds of fungus at the same time. |
| resistance/rɪˈzɪstəns/ n. | the ability to stop something harmful from affecting you | Scientists hope to develop crops with long-lasting resistance to disease. |
| spread/spred/ v. | to move and affect a larger area or more people | The infection has spread to farms in many different countries. |
| eventually/ɪˈventʃuəli/ adv. | in the end, especially after a long time | This research could eventually help farmers protect their crops. |
| expose/ɪkˈspəʊz/ v. | to put someone or something in a situation where they may be harmed | In the test, the plants were exposed to two different infections. |
| predictable/prɪˈdɪktəbl/ adj. | happening in the way you expect, so you can prepare for it | As the climate becomes less predictable, farmers face greater risks. |
| at risk/ət rɪsk/ phrase | in a situation where something bad may happen | Millions of people's food supply is at risk because of the fungus. |