Bacteria recently isolated from walnut (Juglans regia L.) buds in Portugal has been identified as a new species of Xanthomonas. Interestingly, this new species baptised as Xanthomonas euroxanthea includes both pathogenic and non-pathogenic strains on walnut, constituting a unique model to address the emergence and evolution of pathogenicity in Xanthomonas.
Widespread fungal disease in plants can be controlled with a commercially available chemical that has been primarily used in medicine until now. In a comprehensive experiment the team has uncovered a new metabolic pathway that can be disrupted with this chemical, thus preventing many known plant fungi from invading the host plant.
Plants are able to keep growing indefinitely because they have tissues made of meristems–plant stem cells–which have the unique ability to transform themselves into the various specialized cells that make up the plant, dividing whenever appropriate and producing new cells of whatever type as needed. Meristems exist at the tips of all plants, allowing them to grow new stems or new roots, and, in trees, also in the trunk, where they add extra girth.
Scientists have led the first assessment of naturalised, invasive and potentially invasive plant species present in Laikipia County, Kenya, which hosts the highest populations of endangered large mammals in the country.
Researchers have discovered a link between defensive responses in plants and the beautiful but devastating crop parasite witchweed. The new study shows that both parasitic and non-parasitic plants can detect and react to a class of organic compounds called quinones. While parasitic plants sense quinones in their prey and use it to invade, quinones trigger defensive responses in non-parasitic plants that can protect them from bacteria and other microbes.
A team of researchers has discovered that strigolactones, a class of novel plant hormones, mediate the fine-tuning of the production plant defensive substances in the stem of plants of the wild tobacco species Nicotiana attenuata.
A multidisciplinary, international team, has uncovered a new biochemical mechanism fundamental to plant life. Their research details the discovery of the enzymatic reaction involving carbohydrates present in plant cell walls, which are essential for their structure.
Researchers have discovered a new role for a well-known plant molecule, providing the first clear example of ACC acting as a likely plant hormone. Researchers show that ACC has a critical role in pollination and seed production by activating proteins similar to those in human and animal nervous systems. Findings could change textbooks and open the door for research to improve plant health and crop yield.
Bacterial road map offers new targets for Huanglongbing disease treatments. Scientists are closer to gaining the upper hand on a disease that has wiped out citrus orchards across the globe. New models of the bacterium linked to the disease reveal control methods that were previously unavailable.
Plants have a unique ability to safeguard themselves against pathogens by closing their pores—but until now, no one knew quite how they did it. Scientists have known that a flood of calcium into the cells surrounding the pores triggers them to close, but how the calcium entered the cells was unclear.
A new study by an international team reveals that a protein called OSCA1.3 forms a channel that leaks calcium into the cells surrounding a plant’s pores, and they determined that a known immune system protein triggers the process.