Arabidopsis thaliana Archives

Newly Discovered Plant Communication Method — *Thale Cress* (Arabidopsis thaliana)

This isn’t a new method plants use to communicate with each other, because they have been using it for who knows how long. But for scientists, it’s a newly discovered plant communication method.

The natural world is filled with astonishing forms of communication, and plants are no exception. We have mentioned before that plants communicate underground with the aid of fungi and mycorrhizal networks in what some have called the “woods-wide-web.” They also communicate by releasing chemicals into the air. We have even seen that they communicate with insects by means of sounds. Plant communication does not involve images, spoken words, or written texts, but can still be considered communication.

Plants communicate primarily through chemical signals. When a plant experiences stress—such as an attack by herbivorous insects—it may release volatile organic compounds (VOCs) into the air. These airborne chemicals can be detected by neighboring plants, which may then activate their own defense mechanisms preemptively. This method of plant communication has sometimes been described as “eavesdropping.”

The newly discovered plant communication method involves electrical signals passing from plant to plant when leaves touch. Ron Mittler and colleagues at the University of Missouri in Columbia experimented by growing thale cress (Arabidopsis thaliana). They grew some plants in isolation and some in dense patches where the leaves touched. Then they stressed the plants by exposing them to excess light. The plants that were grouped together showed less stress damage than the ones in isolation. The researchers analyzed gene expression in isolated plants and in plants that were touching. They also monitored signals passed between the grouped pants.

According to the report, the plants with leaves touching activated over 2,000 stress-response genes that could help to protect them from excess light, cold, salinity, and wounding. The isolated plants showed greater cell damage under stressful conditions.

Understanding plant communication opens new doors for agriculture, conservation, and our appreciation of design in the natural world. Mittler hopes that this newly discovered plant communication method may be used to design mixed plant communities that are more resilient, perhaps reducing the need for chemical pesticides or fertilizers. We believe that God has given us the tools and the talent to reveal new strategies for ecosystem management and food production.

Reference: sciencenews.org

University of Florida researchers conducted an interesting experiment comparing plant growth in Moon soil and Earth soil. Unfortunately, the lunar soil flunked the test. NASA provided the researchers with small soil samples from three Apollo missions. After placing one gram of the precious lunar soil in each of twelve pots, they planted thale cress (Arabidopsis thaliana) seeds in each pot. They also planted similar seeds in sixteen pots of volcanic Earth soil.

The researchers placed both groups of plants under LED lights and fertilized them with the same nutrients. Plants grew in all of the soil samples, but the lunar soil plants grew more slowly and were smaller and scrawnier than the plants grown in Earth soil. Some of them also had a purplish color typical of plants under stress.

Analysis of the soils showed that the lunar soil was full of metallic iron and tiny glass shards, both toxic to plants. The soil also lacked nitrogen, phosphorus, and trace elements that plants need to grow.

This experiment is of great interest to those wanting to colonize the Moon or Mars. Experiments have shown that space debris pelting their surfaces has altered all planets and moons. To farm on the Moon or other planets, astronauts would have to carry soil from Earth or genetically modify the plants to accept the alien soil. For now, lunar soil flunked the test. Of course, lunar farmers would also have to provide an atmospheric environment allowing plant growth.

The Genesis account tells us that God “planted a garden eastward in Eden” (Genesis 2:8). One part of planting a garden is to prepare the soil and Earth’s environment to support the three kinds of plant life (simple plants, gymnosperms, and angiosperms) mentioned in Genesis 1:10-12.

You might not think that dirt has to be specially designed, but lunar soil flunked the test. This experiment and our knowledge about plants and the solar system shows us that God designed the soil on our planet with the just-right properties to grow the plants we need for survival. Everywhere we look on Earth, and in space, we see that a wonder-working hand has gone before.

Reference: Science News, July 2, 2022, page 4.

Tag: Arabidopsis thaliana

Newly Discovered Plant Communication Method

Lunar Soil Flunked the Test