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:


(Date:2/1/2016)... , February 1, 2016 ... advancements to drive global touchfree intuitive gesture control market ... --> Rising sales of consumer electronics coupled with ... control market size through 2020 ... electronics coupled with new technological advancements to drive global ...
(Date:2/1/2016)... Fla. , Feb. 1, 2016  Wocket® smart wallet ( www.wocketwallet.com ... and television personality, Joey Fatone . Las Vegas ... greet fans. --> Las Vegas , where ... --> The new video ad was filmed at the Consumer ... appeared at the Wocket booth to meet and greet fans. ...
(Date:1/27/2016)... Jan. 27, 2016  Rite Track, Inc. a leading ... West Chester, Ohio announced today the ... staff, based in Austin, Texas , ... to provide modifications, installations and technical support offerings for ... of PLUS, commented, "PLUS has provided world class service ...
Breaking Biology News(10 mins):
(Date:2/4/2016)... -- ContraVir Pharmaceuticals, Inc. (NASDAQ: CTRV ), a ... targeted antiviral therapies, announced today that it will present ... held February 8-9, 2016, at the Waldorf Astoria New ... Healthcare Conference, taking place in New York ... Sapirstein , Chief Executive Officer of ContraVir, will provide ...
(Date:2/4/2016)... California (PRWEB) , ... February 04, 2016 , ... ... Intelligence (AI) and leading supplier of Semantic Graph Database technology has been recognized ... Database Products ” by Corporate America Magazine. , “At Corporate America, it’s our ...
(Date:2/3/2016)...   ViaCyte, Inc ., a leading, privately-held ... cell-derived islet replacement therapy for the treatment of ... that ViaCyte and Janssen Biotech, Inc., one of ... have agreed to consolidate the assets of the ... ViaCyte with an exclusive license to all BetaLogics ...
(Date:2/3/2016)... -- Ascendis Pharma A/S (Nasdaq: ASND ), a ... technology to address significant unmet medical needs, today announced ... Partners Global Healthcare Conference Location: , Waldorf Astoria, ... Time:  , 11:55am EST www.ascendispharma.com . ... audio webcast of this event will be posted to ...
Breaking Biology Technology:
Cached News: