How does a developing plant shoot know how, where, and when to grow? Dividing cells need to pass messages from one another to coordinate growth. In plants, important messages are packaged into RNA, which are sent from cell to cell. By studying Arabidopsis thaliana, researchers found that RNA messages need a special protein to escort them where they need to go. Without this escort, cells cannot coordinate and the plant fails to develop properly.
Scientists are honing the traits of speed, strength and near invulnerability in sorghum, a very important food crop. Achieving a milestone in their pursuit of the Superman of sorghum plants, scientists identified a single gene that confers broad protection from the fungal diseases anthracnose, rust and target spot.
What determines how a cell’s genome is regulated to ensure proper growth and development? Turns out, the parts of the genome that are turned on or off in each cell-type or tissue play a major role in this process. Now, a research team has shown that the CLASSY gene family regulates which parts of the genome are turned off in a tissue-specific manner. The CLASSYs essentially control where the genome is marked by DNA methylation—the addition of methyl chemical groups to the DNA that act like tags saying, “turn off.” Because DNA methylation exists across diverse organisms, including plants and animals, this research has broad implications for both agriculture and medicine.
Researchers recently announced that they have discovered the genetic linkages governing the formation of flowers. The revelation solves a long-standing mystery—how are there so many different types of flowers in the world?—and shines a bright light into a dark corner of evolution. The research also demonstrates the power of a technique called “forward genetics” in uncovering the mysteries of nature.
Most trees live in symbiosis with fungi. Researchers show just how important this partnership is for tree growth through the first-ever comprehensive data analysis compiled for European forests on a massive scale.
Enzymatic hydrolysis of planteose: α-Galactosidase is a promising molecular target for root parasitic weed control.
Researchers have discovered a gene that will make it possible to produce seeds from crops that are genetically identical to the mother plant and that do not need pollination.
Feeling the heat: Steroid hormones contribute to the heat stress resistance of plants. Plants, like other organisms, can be severely affected by heat stress. To increase their chances of survival, they activate the heat shock response, a molecular pathway also employed by human and animal cells for stress protection. Researchers have now discovered that plant steroid hormones can promote this response in plants.
The use of genetic information is now indispensable for modern plant breeding. Even though DNA sequencing has become much cheaper since the human genome was decoded for the very first time in 2003, collecting the full genetic information still accounts for a large part of the costs in animal and plant breeding. One trick to reduce these costs is to sequence only a very small and randomly selected part of the genome and to complete the remaining gaps using mathematical and statistical techniques.
Radiant and flavorful, lychees were so beloved that they were domesticated not just once in ancient times, but independently in two different regions of China, a study finds.
