tobacco

Tobacco could serve a higher purpose than filling cigarettes. That’s the implication of a recently-published thesis in Spain describing a new strain of genetically modified (GM) tobacco with potential as a green energy resource.

In her Ph.D. thesis, agricultural engineer Ruth Sanz-Barrio showed how the strategic deployment of proteins in the tobacco plant could multiply how much starch and usable sugar it produced.

Her experiments saw starch production grow by an astonishing 700 percent and sugars by 500 percent. She says these numbers suggest the GM version of the crop could work as a viable biomass resource for green biofuels.

Among the most plentiful raw materials on earth, ‘biomass‘—plant-based organic matter—is considered a renewable source of energy. However, major economic barriers remain.

The modified tobacco could provide solutions to some of these limitations. It could also give tobacco—a crop under fire for its negative health impacts—a new lease on life beyond the manufacture of cancer-causing cigarettes.

 

Cost-Effective Bioenergy

One reason biofuels haven’t taken off is their relatively low energy outputs: more is needed to get the same amount of energy, often rendering industrial-scale production unlikely.

A highly productive plant could help compensate for these expenses. Tests at the National Centre for Renewable Energies’ biomedical engineering program suggest Sanz-Barrio’s transgenic tobacco would yield ten times more biofuel by mass than ordinary tobacco.

Tobacco would also be an attractive non-food alternative to prevailing biofuels based on foodstuffs like corn, alleviating fears that spiking demand from fuel consumers may be having an effect on the price of critical food staples.

Related:   Genome mapping: Tomato to be next GM fruit?

 

‘Green’ Tobacco?

Tobacco is cultivated around the world, including in the researcher’s nation of Spain. But Spain’s traditional tobacco-producing regions in Extremadura and Andalusia have lately seen government subsidies for the cash crop slashed, diminishing a once-thriving source of local jobs.

Sanz-Barrio suggests a constructive use for the plant’s carbon-rich biomass could help revitalize these tobacco-specialized areas.

Of course, sugar productivity is not the only element that makes a good potential biofuel. Moreover, tobacco cultivation is not exactly known for being environmentally friendly.

Can tobacco ‘go green’? Could it be a green alternative to food-based biofuels? The conversation has just begun on this topic – and a fascinating conversation it is. Although tobacco may not be the ultimate answer to the world’s hunger for clean, renewable energy, Sanz-Barrio’s thesis is one of the latest efforts among researchers in the world’s top bioengineering programs to one day find a pathway to mass production of a viable biofuel.

4 COMMENTS

  1. I am against GMO’s for many valid scientific, environmental and ethical reasons so to read an article stating that scientific research is saying they might lead to a good thing, ie in this case biofuel, is irritating.

    • I’m actually excited by this prospect. Tobacco grows in a lot of places that food crops won’t – tobacco doesn’t need to flower to be harvestable, meaning it’s far less nutrient intensive than many plants. And if the GMO version produces as much starch and sugar as this article says it does, it could be an incredible source of energy in the short term – either as ethanol or as biodiesel. It may even be able to be converted into isobutanol when the process becomes more cost-competitive.

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