‘Evil’ carbon dioxide saves plants from another poison. Consider that the next time you eat a piece of fruit.
Taming a poison: Saving plants from cyanide with carbon dioxide
The scientific world is one step closer to understanding how nature uses carbon-capture to tame poisons, thanks to a recent discovery of cyanoformate by researchers at Saint Mary’s University (Halifax, Canada) and the University of Jyväskylä (Finland). This simple ion — which is formed when cyanide bonds to carbon dioxide — is a by-product of the fruit-ripening process that has evaded detection for decades.
Chemists have long understood the roles presence of cyanide (CN−) and carbon dioxide (CO2) in fruit ripening, but have always observed them independently. This is the first time scientists have isolated the elusive cyanoformate anion (NCCO2−) and characterized its structure using crystallography and computational chemistry.
The results of the two-year study led by Dr. Jason Clyburne, Saint Mary’s University, and Dr. Heikki M. Tuononen, University of Jyväskylä, were released today in Science, the world’s preeminent scientific journal.
Their findings demonstrate the profound effect the surrounding medium has on the stability of cyanoformate. This situational stability allows carbon dioxide to deactivate cyanide’s toxic capabilities at the enzyme’s active site where chemical reactions take place. Subsequently, the cyanoformate migrates to the cytoplasm of the cell where it breaks down, releasing the toxic cyanide at a location where it can be dealt with. While this explains how the formation of cyanide does not halt the fruit ripening process, the implications extend far beyond plants and a single enzyme. Recognizing the factors governing the stability of cyanoformate furthers our understanding of carbon-capture, a process used to trap and store carbon dioxide in the environment.
“Here we have a perfect example of nature taming a poison, and what better way to learn the chemistry of carbon-capture than from nature itself?” says Dr. Jason Clyburne, Canada Research Chair in Environmental Science and Materials, and professor of Environmental Science and Chemistry at Saint Mary’s University.
“One of the biggest challenges in carbon capture is finding a material that not only captures CO2, but easily releases it,” says Luke Murphy, a Masters of Science candidate at Saint Mary’s who prepared the crystalline material for the study. “Cyanoformate does both and can be used as a model to develop a greener alternative.”
This discovery highlights the importance of applied chemistry to other areas of science and indicates there is still more to be learned about the chemistry of carbon dioxide in cells.
“The fact that cyanoformate was undetected for so long begs the question: What other simple chemistry have we missed?” asks Dr. Heikki M. Tuononen, Academy of Finland research fellow, and senior lecturer at University of Jyväskylä, Finland.
Is it just me who is sick and tired of so-called scientists using the word “carbon” to mean “carbon dioxide”? I call them “so-called” scientists because I would think someone like Dr. Heikki M. Tuononen, Academy of Finland research fellow, and senior lecturer at University of Jyväskylä, Finland and Luke Murphy, a Masters of Science candidate at Saint Mary’s, would know the difference between carbon and carbon dioxide.
David Schofield said “Apricot kernels are a cyanide problem.
http://news.bbc.co.uk/1/hi/health/4901132.stm“
That news item is out of date (2006), since then the same compund has been found in other foods, guava if memory serves me right, and they have found some statistical evidence of an effect and so is being investigated as an additional weapon in the fight aginst cancer for some people.
From a 2012 paper “Overall, these findings suggest that guava leaves can interfere with multiple signaling cascades linked with tumorigenesis and provide a source of potential therapeutic compounds for both the prevention and treatment of cancer.” There’s lots to found via Google on the subject.
Of course there is no one miracle cure for any cancer in all people, never mind a miracle bullet for all cancers. But every extra aid in the fight against cancer helps, and nothing that might help even a few people should be as casually dismissed as that BBC 2006 article implied.
Pat Frank says:
April 3, 2014 at 7:26 pm
“Cyanoformate is a side-product during production of ethylene, a critical fruit ripening hormone.”
Thanks Pat. Read somewhere that ethylene gas was used to ripen green tomatoes for market, and couldn’t figure that one out.
Jayhd, Righto, calling it Oxygen pollution would seem to be more accurate since C makes up less than a third of the ttl weight. Oxygen is corrosive and combustible and must be reduced NOW
Talking about Carbon Fixation, over geological time, CO2 has trended DOWN drastically, and plants have had to adapt. Most of the plants that humanity depends on are C3 plants, which need 200 ppm or higher CO2 levels. It appears that C4 carbon fixation in plants evolved to deal with the declining CO2 level over geological time
http://earthguide.ucsd.edu/virtualmuseum/climatechange2/07_1.shtml
C4 carbon fixation
“C4 fixation is an elaboration of the more common C3 carbon fixation and is believed to have evolved more recently. C4 and CAM overcome the tendency of the enzyme RuBisCO to wastefully fix oxygen rather than carbon dioxide in what is called photorespiration.”
http://en.wikipedia.org/wiki/C4_carbon_fixation
C3 carbon fixation
“Plants that survive solely on C3 fixation (C3 plants) tend to thrive in areas where sunlight intensity is moderate, temperatures are moderate, carbon dioxide concentrations are around 200 ppm or higher,”!!!
C3 plants “still represent approximately 95% of Earth’s plant biomass”
http://en.wikipedia.org/wiki/C3_plants
From the C4 Carbon Fixation Wiki… Converting C3 plants to C4 to make them more productive under the current low CO2 conditions!
“Given the advantages of C4, a group of scientists from institutions around the world are working on the C4 Rice Project to turn rice, a C3 plant, into a C4 plant. As rice is the world’s most important human food—it is the staple food for more than half the planet—having rice that is more efficient at converting sunlight into grain could have significant global benefits towards improving food security. The team claim C4 rice could produce up to 50% more grain—and be able to do it with less water and nutrients.[19][20][21]
The researchers have already identified genes needed for C4 photosynthesis in rice and are now looking towards developing a prototype C4 rice plant. In 2012, the Government of the United Kingdom along with the Bill & Melinda Gates Foundation provided $14 million over 3 years towards the C4 Rice Project at the International Rice Research Institute.[22]”
http://en.wikipedia.org/wiki/C4_carbon_fixation
What is C4 Rice?
http://c4rice.irri.org/
C4 photosynthesis: principles of CO2 concentration and prospects for its introduction into C3 plants
“C4 photosynthesis has a number of distinct properties that enable the capture of CO2 and its concentration in the vicinity of Rubisco, so as to reduce the oxygenase activity of Rubisco, and hence the rate of photorespiration. The aim of this review is to discuss the properties of this CO2‐concentrating mechanism, and thus to indicate the minimum requirements of any genetically‐engineered system. In particular, the Kranz leaf anatomy of C4 photosynthesis and the division of the C4‐cycle between two cell types involves intercellular co‐operation that requires modifications in regulation and transport to make C4 photosynthesis work. Some examples of these modifications are discussed. Comparisons are made with the C4‐type photosynthesis found in single‐celled C4‐type CO2‐concentrating mechanisms, such as that found in the aquatic plant, Hydrilla verticillata and the single‐celled C4 system found in the terrestrial chenopod Borszczowia aralocaspica. The outcome of recent attempts to engineer C4 enzymes into C3 plants is discussed. ”
http://jxb.oxfordjournals.org/content/53/369/581.short
Can anyone cite me a source where C02 helps plants use less water?
“The fact that cyanoformate was undetected for so long begs the question: What other simple chemistry have we missed?” asks Dr. Heikki M. Tuononen, Academy of Finland research fellow, and senior lecturer at University of Jyväskylä, Finland.
The simplest of plant life organic chemistry eludes and ‘surprises’ us in this age of ‘environmental enlightenment’, yet we are assured that our understanding of global atmospheric, land, and sea climate interactions are sufficiently resolved to allow ‘modeling’ of the whole flam damn planet earth and everything on it with such accuracy as to allow climate ‘forecasting’ for a century and more into the future.
Unbelievable……. The unparalleled arrogance and profound ignorance of AGW proponents is unmatched in human history.
“One of the biggest challenges in carbon capture is finding a material that not only captures CO2, but easily releases it,”
– Quote from the paper.
Ten years from now, people will realize just how silly this statement about “carbon capture” is, because:
Earth’s atmosphere is severely CO2–deficient at this time and additional CO2 (from whatever source) is beneficial.
Wayne Lusvardi says:April 4, 2014 at 8:23 pm
Can anyone cite me a source where C02 helps plants use less water?
Look up plant stomata. They are the underleaf pores that plants respire through. More CO2 = smaller stomata = less water loss.