01 Apr 2013:
Genetic Discovery May Allow
Lettuce Growth Even in Hot Temperatures
A team of scientists has identified the specific gene in lettuce that causes the plant’s seeds to stop germinating in warm temperatures, a discovery they say could allow production of the food crop year-round even in the planet’s hotter regions. Writing in the journal The Plant Cell
, the researchers say
they identified a chromosome in the wild ancestor of commercial lettuce varieties that enabled seeds to germinate even in warm temperatures. When the chromosome was crossed with commercial varieties of lettuce, they too were able to germinate at warmer temperatures
. After further testing, the scientists found the specific gene that governs a plant hormone known as abscisic acid — which inhibits seed germination in most lettuce plants when exposed to moisture at warm temperatures — and were able to “silence” the mechanism. “Discovery of the genes will enable plant breeders to develop lettuce varieties that can better germinate and grow to maturity under high temperatures,” said Kent Bradford, a professor of plant sciences at the University of California Davis and one of the study’s authors. Because this mechanism occurs in many plant species, he said, the results suggest similar modifications can be made in the growth of other crops.
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
, the online educational network. Visit the site.
Business & Innovation
Policy & Politics
Pollution & Health
Science & Technology
Antarctica and the Arctic
Central & South America
Photographer Robert Wintner documents the exquisite beauty and biodiversity of Cuba’s coral reefs, which are largely intact thanks to stifled coastal development in the communist nation. View the gallery.
is now available for mobile devices at e360.yale.edu/mobile
The Warriors of Qiugang
, a Yale Environment 360
video, chronicles a Chinese village’s fight against a polluting chemical plant. It was nominated for a 2011 Academy Award for Best Documentary Short.
Watch the video.
Top Image: aerial view of Iceland
. © Google & TerraMetrics.
A three-part series Tainted Harvest
looks at the soil pollution crisis in China, the threat it poses to the food supply, and the complexity of any cleanup. Read the series.