Forests of genetically altered trees and other plants could sequester several billion tons of carbon from the atmosphere each year and so help ameliorate global warming, according to estimates published in the October issue of ‘BioScience’.
The study, by researchers at Lawrence Berkeley National Laboratory and Oak Ridge National Laboratory, outlines a variety of strategies for augmenting the processes that plants use to sequester carbon dioxide from the air and convert it into long-lived forms of carbon, first in vegetation and ultimately in soil. Besides increasing the efficiency of plants’ absorption of light, researchers might be able to genetically alter plants so they send more carbon into their roots – where some may be converted into soil carbon and remain out of circulation for centuries.
Other possibilities include altering plants so that they can better withstand the stresses of growing on marginal land, and so that they yield improved bioenergy and food crops. Such innovations might in combination boost substantially the amount of carbon that vegetation naturally extracts from air, according to the authors’ estimates.
The researchers stress that the use of genetically engineered plants for carbon sequestration is only one of many policy initiatives and technical tools that might boost the carbon sequestration already occurring in natural vegetation and crops.
The article, by Christer Jansson, Stan D. Wullschleger, Udaya C. Kalluri, and Gerald A. Tuskan, is the first in a Special Section in the October ‘BioScience’ that includes several perspectives on the prospects for enhancing biological carbon sequestration.
Other articles in the section analyze the substantial ecological and economic constraints that limit such efforts. One article discusses the prospects for sequestering carbon by culturing algae to produce biofuel feedstocks; one proposes a modification of the current regulatory climate for producing genetically engineered trees in the United States; and one discusses societal perceptions of the issues surrounding the use of genetically altered organisms to ameliorate warming attributed to the buildup of greenhouse gases.
The complete list of peer-reviewed articles in the October 2010 issue of ‘BioScience’ is as follows:
Phytosequestration: Carbon Biosequestration by Plants and the Prospects of Genetic Engineering
Christer Jansson, Stan D. Wullschleger, Udaya C. Kalluri, and Gerald A. Tuskan
Opportunities and Constraints for Forest Climate Mitigation
Robert B. Jackson and Justin S. Baker
Managing Soils and Ecosystems for Mitigating Anthropogenic Carbon Emissions and Advancing Global Food Security
Rattan Lal
Microalgae: The Potential for Carbon Capture
Richard Sayre
Far-reaching Deleterious Impacts of Regulations on Research and Environmental Studies of Recombinant DNA-modified Perennial Biofuel Crops in the United States
Steven H. Strauss, Drew L. Kershen, Joe H. Bouton, Thomas P. Redick, Huimin Tan, and Roger A. Sedjo
Societal Choice for Climate Change Futures: Trees, Biotechnology, and Clean Development
Emily Boyd
Time Horizons and Extinction Risk in Endangered Species Categorization Systems
Jesse D’Elia and Scott McCarthy
About BioScience
BioScience, published 11 times per year, is the journal of the American Institute of Biological Sciences (AIBS). BioScience publishes commentary and peer-reviewed articles covering a wide range of biological fields, with a focus on “Organisms from Molecules to the Environment”. The journal has been published since 1964. AIBS is an umbrella organization for professional scientific societies and organizations that are involved with biology. It represents some 200 member societies and organizations with a combined membership of about 250,000.
Source: AIBS Press Release dated October 1, 2010.
