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17 April 2014 12:48 pm ,
Vol. 344 ,
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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An Original Green Thumb
19 May 1997 (All day)
Yesterday would have been the 94th birthday of Frits Went, a Dutch-born American botanist who discovered the role of the plant hormone auxin and paved the way for the development of weed killers, fertilizers, and genetically engineered crops.
While studying oat seedlings, Went found that auxin produced at the tip was distributed preferentially down the dark side of the shoot, which explained why seedlings grow faster on that side and bend toward the light. In 1927, his theory of phototropism was not well accepted, but eventually it shaped the new field of agricultural chemistry.
Went also developed the first phytotron--a greenhouse that mimics natural climatic conditions--which was built in 1949 at the California Institute of Technology. And on a trip to Brazil in the late 1960s, Went discovered that Amazon forest soil was riddled with a network of fungi, which he proposed digest the tree litter and pass nutrients to intertwined tree roots. That theory was used to bolster the growing movement to save the rain forest from clear-cutting.
[Source: Emily McMurray, Ed., Notable Twentieth Century Scientists (Gale Research Inc., ITP, 1995).]