HOME >> BIOLOGY >> NEWS
Isoprene emission from plants -- a volatile answer to heat stress

Isoprene is a hydrocarbon volatile compound emitted in high quantities by many woody plant species, with significant impact on atmospheric chemistry. The Australian Blue Mountains and the Blue Ridge Mountains in the Eastern United States are so called because of the spectral properties of the huge amounts of isoprenes emitted from the trees growing there. Although a positive correlation has been observed between leaf temperature and isoprene emission in plants, the physiological role of isoprene emission, which is clearly quite costly to the plant, is still under vigorous debate.

One of the most popular hypotheses suggests that isoprene protects the metabolic processes in the leaf, in particular photosynthesis (the process by which plants use light energy to fix CO2 and produce their own food), against thermal stress. To test this hypothesis, scientists Katja Behnke and Jrg-Peter Schnitzler from the Institute for Meteorology and Climate Research of the Research Centre Karlsruhe in Garmisch-Partenkirchen in Germany, together with colleagues from the Universities of Braunschweig and Gttingen, also in Germany, and British Columbia, in Canada, recently applied genetic engineering techniques to obtain transgenic Grey poplar (Populus x canescens) trees with decreased isoprene emission, and examined their tolerance to heat. Their findings have been published in The Plant Journal.

Behnke et al. engineered such poplar trees by suppressing the expression of the gene encoding isoprene synthase (ISPS), the enzyme producing isoprene, by RNA interference (RNAi). They then subjected these trees to transient heat phases of 38-42C, each followed by phases of recovery at 30C, and measured the performance of photosynthesis. In these experiments, Behnke et al. observed that photosynthesis in trees that no longer emitted isoprenes was much less efficient under such repeated heat shocks (a situation that is similar to what happens in nature, where temperatures around
'"/>

Contact: Davina Quarterman
davina.quarterman@oxon.blackwellpublishing.com
01-865-476-307
Blackwell Publishing Ltd.
26-Jul-2007


Page: 1 2

Related biology news :

1. Climate change and permafrost thaw alter greenhouse gas emissions in northern wetlands
2. Particle emissions from laser printers might pose health concern
3. New multiple myeloma treatment induced total remission in 33 percent of patients
4. Blood test may help signal tumors remission, return in throat cancer patients
5. Alarming acceleration in CO2 emissions worldwide
6. Carnegie Mellon researchers urge regulators to rethink strategies for soot emission
7. Fires fuel mercury emissions, University of Michigan study finds
8. Global warming of the future is projected by ancient carbon emissions
9. Increase in carbon dioxide emissions accelerating
10. UGA scientists discover bacterial switch gene that regulates oceans sulfur emissions into the air
11. Study considers auto industry and consumer behavior in reducing greenhouse gas emissions

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Isoprene emission from plants volatile answer heat stress

(Date:10/30/2014)... researchers have developed a suite of technologies that can ... which has applications in everything from search and rescue ... developed a platform for computer-mediated communication between humans and ... interpreting dogs, behavioral signals and sending them clear and ... assistant professor of computer science at NC State and ...
(Date:10/29/2014)... Cancer suffers who lose their hair as a consequence ... that will improve the scalp cooling technology that prevents ... and is being pioneered by global scalp cooling manufacturing ... with the biology department of the University of Huddersfield. ... Omar Hussain, who has a background in the pharmacology ...
(Date:10/29/2014)... have been blamed for increasing the risk of ... family history of schizophrenia, are widely accepted. Others, ... a parasite transmitted by soil, undercooked meat and ... A new study by Gary Smith, professor of ... Pennsylvania,s School of Veterinary Medicine, used epidemiological modeling ...
Breaking Biology News(10 mins):New tech aims to improve communication between dogs and humans 2New technology on the way to aid cancer suffers who lose their hair after chemotherapy 2Penn vet professor investigates parasite-schizophrenia connection 2Penn vet professor investigates parasite-schizophrenia connection 3
(Date:10/30/2014)... A new report, commissioned by BioCrossroads and ... in-depth look at Indiana,s capital ... two different time frames: 1993 to 2002 and 2003 ... opportunities for investment growth.  The Life Science Innovation ... gains in innovation dollars as well as an increase ...
(Date:10/30/2014)... – The severe flooding that devastated a wide swath ... if the bridges, roads and other infrastructure had been ... the University of Colorado Denver. , "People need to ... Kim, PhD, associate professor of structural engineering at the ... lead author the study. "There is an assumption that ...
(Date:10/27/2014)... , October 27, 2014 ... to produce, exhibit and sell its artificial "lower ... impeach their patent.      (Photo: ... years of fighting, the definitive judgement has arrived: ... produces innovative and accessible hi-tech prostheses with composite ...
(Date:10/27/2014)... (PRWEB) October 27, 2014 The ... Oncology, Genetics, Microbiology), Technology (PCR, INAAT, DNA Sequencing), ... Reagent, Service, Software) - Global Forecast to 2018” ... restraints, challenges, opportunities, current market trends, and strategies ... the estimates and forecasts of the revenue and ...
Breaking Biology Technology:New report shows Indiana's gains in life sciences innovation capital outpace the nation 2New report shows Indiana's gains in life sciences innovation capital outpace the nation 3New report shows Indiana's gains in life sciences innovation capital outpace the nation 4New report shows Indiana's gains in life sciences innovation capital outpace the nation 5CU Denver study says upgrading infrastructure could reduce flood damage 2Italian Lower Limb Prosthesis Company Wins Lawsuit Against German Giant Ottobock 2Global Molecular Diagnostics Market Will Reach $7.9 Billion by 2018 - New Research Report by MarketsandMarkets 2Global Molecular Diagnostics Market Will Reach $7.9 Billion by 2018 - New Research Report by MarketsandMarkets 3Global Molecular Diagnostics Market Will Reach $7.9 Billion by 2018 - New Research Report by MarketsandMarkets 4Global Molecular Diagnostics Market Will Reach $7.9 Billion by 2018 - New Research Report by MarketsandMarkets 5
Cached News: