Language:
eu
es
en
Basque Research Elhuyar - Zientzia

BASQUE RESEARCH
 Basque research, development and innovation web site

Contact:
Victoria Alfonso Seminario
Universidad Pública de Navarra
Contact details:
ucc@unavarra.es
(+34) 948168457
Universidad Pública de Navarra

2014/4/14

Genetically modified tobacco plants as an alternative for producing bioethanol

Researchers at the NUP/UPNA-Public University of Navarre and the IdAB-Institute of Agrobiotechnology have conducted a study into genetically modified tobacco plants from which it is possible to produce between 20 and 40 per cent more ethanol; this would increase their viability as a raw material for producing biofuels.

Tobacco, a high-density crop which is mown several times throughout its cycle, can produce as much as 160 tonnes of fresh matter per hectare and become a source of biomass suitable for producing bioethanol. As Jon Veramendi, head of the plant Agrobiotechnology research group, explained, “tobacco plants as a source of biomass for producing bioethanol could be an alternative to traditional tobacco growing which is in decline in the USA and in Europe because it cannot compete with emerging countries like China".

In the course of the research, which has been echoed by the journal Molecular Breeding, tobacco plants of the Virginia Gold and Havana commercial cultivars have been grown. The plants were genetically modified to increase their production of starch and sugars, which contributes to the increase in ethanol production. The basis of this work is the PhD thesis by Ruth Sanz-Barrio, read at the NUP/UPNA last year. The researchers Imma Farrán, Jon Veramendi, Alicia Fernández-San Millán, María Ancín and Luis Larraya have participated in this work.

As Prof Veramendi explained, “what has been done now is fieldwork with these two tobacco cultivars and it has been found that the starch and sugars in the tobacco leaf are in fact higher.” Traditional tobacco growing allows the plant to develop and the leaves to grow and get bigger, as the nicotine is synthesised when the plant is more mature. However, if the plants are used for producing biofuels, the researchers go for a higher-density crop similar to that of forage crops: “the tobacco plants are sown very close to each other and various mowings are made throughout the cycle. When the plant has grown to a height of about 50 cm, it is cut and the output is taken to the biomass processing factory. That way, it is possible to obtain up to 160 tonnes of matter per hectare over the whole cycle ”.

What is more, when the tobacco is integrated into a biorefinery, it is possible to extract interesting by-products like proteins (they constitute up to 30% of the dry weight of the plant and are nutritionally more complete and have a greater protein efficiency rate than those from cow's milk or soya, so they could be used to feed humans or animals), solasenol (used to produce vitamins E and K) and xanthophylls (an additive in chicken feeds).

Over the last ten years, the surface area devoted to tobacco growing has been cut in Europe by 45%. In Spain, the main tobacco-growing area is Extremadura, followed by Andalusia. The researchers consider that one of the alternatives to the traditional use of tobacco could be to produce biofuel. From now on, high-density cultivation tests will need to be carried out to see whether the results obtained in the fieldwork, where the cultivated surfaces are very small, are confirmed.

Bioteknologia, Botanika, Genetika, Energia berriztagarriak Go to top of page
Internet reference
www.unavarra.es/actualidad/berriak?contentId=180381
Additional information
Images
Go to top of page

Search

Search in Basque Research [ Advanced search ]

Login

Users data

Navigation

Main menu

Go to top of page

Thesis Prize and International network

Go to top of page Go to top of page

Statistics

Go to top of page

XML RSS Feeds

Go to top of page

Standars and accesibility

Go to top of page

Register

Go to top of page

Menu for registered users

Go to top of page


BR Eraberritzen Bloga


Services

Go to top of page Go to top of page

Sponsors:

Eusko Jaurlaritza

The use of the contents of this website is forbidden without permission.

Copyright © 2007 Elhuyar Fundazioa

basqueresearch@elhuyar.com