What’s the difference between bees, wasps and hornets? You may be surprised to learn that some are masquerading as imposters. Take yellow jackets for instance, whose yellow and black stripes speak bee when in fact they are wasps. In the natural world, though, all three serve a purpose. So before you reach for the chemical spray, please see below. Continue reading →
It’s been a half century now since Earth Day made its debut on April 22, 1970. I still remember the strangeness of being dismissed early from school to clean up litter. At the time, the idea seemed foreign to us, which means, of course, that we were used to throwing our trash on the ground. It’s hard to imagine in this day and age that was the common mindset. Continue reading →
For many of us, attracting wildlife to our gardens sounds good in theory but fails in practice. Especially when it comes to that four-legged pest the white–tailed deer. However, there are many sound reasons for enticing birds, insects, even small animals back into our yards. It’s not only good for our local ecosystem, but it also keeps our flowers blooming. And it just might be the right thing to do.Continue reading →
Last week, I was manning the booth at the Master Gardener Demo Garden when someone plopped a tall, spindly plant down onto the table. It looked pitiful; the flowers were long gone and the leaves had circular holes in them. But upon closer inspection, I spotted a few lantern-shaped chrysalises and some colorful caterpillars working their way up the stems. The plant was none other than milkweed. And the ‘lanterns’ contained baby monarchs in the process of forming. Continue reading →
“Sometimes the best thing you can do is…. nothing. –Oliver Kellhammer, Ecological Artist
There’s a lesser-known field of botany called the study of ruderal plants, or plants that grow on waste ground, ruins or rubble. Borne by birds, wind or other animals, the weed-like species are the first to colonize lands disturbed by wildfires, avalanches, construction and other ecological disasters. The plants self-sow in abandoned areas, forming impromptu gardens and forests over time. They’re living proof of what Mother Nature can do when left to her own devices. Continue reading →
It couldn’t help but attract my attention; a neat row of old, preserved birds, their soft, feathery chests face-up: some were dark with soot, others by comparison, were clean. All came from an industrial area in the United States called the Rust Belt. That is key to the story. Continue reading →
Trees are generally admired for their surface beauty, but their health and vigor springs from what’s underground. That’s according to Dr. Kelby Fite, Director of Research for Bartlett Tree Research Lab in Charlotte, North Carolina, who spoke to Maryland’s master gardeners last week on why your trees may be failing. His lecture entitled ‘Managing the Landscape Below Ground’ provided a wealth of information about how to improve the life of the trees in our landscape. According to Fite, it all starts with the soil. Continue reading →
Most of us are well aware that a walk in the woods is a breath of fresh air; especially if you’re stressed out from city life or the artificial glow of computer screens. But now in a growing trend, people are heading to the woods to experience nature in a completely different way. It’s called forest bathing. Continue reading →
After 14 days without water, only the plants treated with vinegar survived. NIKEN
Lack of water is becoming an increasing concern both for human and plant life throughout the world. Now comes the news that scientists in Japan have discovered that ‘watering’ plants with vinegar can help them survive longer under drought conditions. I don’t know about you, but I’m reaching for that bottle of white vinegar right now to see if my hydrangeas wouldn’t like a swig.
Last week, scientists at the RIKEN Center for Sustainable Resource Science (CSRS) published the results of a study that showed huge promise for thirsty plants of the future. Researchers revealed that they had stumbled upon a new biological pathway in certain species that sprang into action in times of water stress. By studying the pathway and the chain of chemical reactions within it, the scientists made a surprising discovery. They found they could induce greater drought tolerance in certain plants by growing them in vinegar.
Most of us are familiar with vinegar’s miraculous cleaning and anti-bacterial properties, but helping plants cope with drought? Now that is shocking news indeed.
My hydrangea showing signs of water stress
A little plant named Arabidopsis
It all started with a collaborative effort to understand the plant Arabidopsis, also known as thale cress. A relative of cabbage and mustard, this genus of small flowering plants was the first species to have its entire genome sequenced. As a result, it is considered a model organism for studying plant biology.
Perhaps most interestingly, Arabidopsis is also known to exhibit strong drought tolerance. This is due to a mutation to an enzyme called HDA6. Specifically, the mutation allows the plant to grow normally without water for extended periods of time.
Microscopic view of anther of Arabidopsis, also known as thale cress
HDA6 acts as a switch
Indeed, initial testing showed that when experiencing drought stress, Arabidopsis uses HDA6 to activate a biological pathway that produces acetate, which is also the main component of vinegar. The HDA6 enzyme acts as a switch, controlling which type of metabolic pathway is active. While most plants are busy using metabolic pathways to break down sugar for energy, in times of drought, Arabidopsis switches to this acetate-producing pathway.
Clearly there was something going on. To find out how this switch works in times of water stress, scientists conducted an experiment. They grew normal plants under drought conditions, treating some with water, some with organic acids and others with acetic acid. After 14 days, they measured the results. Surprisingly, 70 percent of the plants treated with acetic acid were still living. Conversely, all of the other plants had died.
Microscopic view of stem epidermis of thale cress showing hairs and stomata
A link between acetate and drought performance
By measuring the amounts of acetate in the Arabidopsis, the team discovered that there was a direct correlation between the amount of acetate the plants produced and how well they performed under drought conditions. Even more exciting, the team carried out the same experiment on rice, wheat and maize and these species’ tolerance increased, too, when grown in optimal acetic acid concentrations.
Close-up of rice plant
It goes without saying that the implications of this research are huge. In an increasingly water-stressed future, this discovery might offer a simple, low-cost alternative to other strategies like genetic engineering. Still, I’m not sure if vinegar will help my hydrangeas survive another scorching Maryland summer, but it’s worth a try. I’ll let you know.