Scientists are getting closer to finding the genes for maleness in waterhemp and Palmer amaranth, two of the most troublesome agricultural weeds in the U.S. Finding the genes could enable new “genetic control” methods for the weeds, which, in many places, no longer respond to herbicides.
Sudden death syndrome (SDS) is a devastating disease that afflicts soybean crops, causing annual losses in U.S. soybean yields in excess of $274 million dollars. New research shows that the trick to surviving the disease might be a matter of timing when to mount a defense response.
Historically credited as being the first bacterium ever characterized as a plant pathogen, fire blight is a bacterial disease that leads to significant losses of pear and apple. The role of insects in the spread of this disease has been long studied. In a new study, plant pathologists take a hypothesis that has been more or less ignored for 100 years and provided support for its validity.
A deadly wheat disease common to Asia and South America has been identified in Africa for the first time, raising fears of potential spread to wheat crops across the continent. Researchers say that the fast-acting and devastating fungal disease known as wheat blast was first spotted in Africa in the Zambian rainfed wheat production system in the 2017-2018 crop cycle.
Downy mildew is the biggest threat to spinach production around the world. While the pathogen has a short life cycle (approximately a week), it can produce millions of spores during the spinach growing season. Overhead sprinkler irrigation systems and dew formation on cool nights leads to more moisture, which enables these spores to infect the spinach.
The cultivation of vanilla in Madagascar provides a good income for small-holder farmers, but without trees and bushes the plantations can lack biodiversity. Agricultural ecologists have investigated the interaction between prey and their predators in these cultivated areas.
Recently discovered interactions between plant and viral proteins open up new avenues for making plants resistant to viruses, thus safeguarding crop yields in changing climate conditions.
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.
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.
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.
