Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Boosting Vitamin C in Plants Can Help Reduce Smog Damage

13.07.2005


UCR research shows boosting plant vitamin C levels can minimize ozone’s damaging effects


Ozone-damaged plant (left) and normal plant (right). Photo courtesy of Gene Daniels/U.S. EPA



The harmful effects of smog on people and animals – the stinging eyes and decreased lung capacity – are the stuff of well-researched fact. Now, the body of knowledge about air pollution’s effects on plants has grown with University of California, Riverside Biochemistry Professor Daniel Gallie’s discovery of the importance of vitamin C in helping plants defend themselves against the ravages of ozone – smog’s particularly nasty component.

By manipulating dehydroascorbate reductase (DHAR), a naturally occurring enzyme that recycles vitamin C, to increase the level of the vitamin in leaves, Gallie has been able to reduce the harmful effects of ozone on plants, apparent as brown spots, stunted size, and lowered crop yields. He and Assistant Research Biochemist Dr. Zhong Chen published their findings in a recent paper titled Increasing Tolerance to Ozone by Elevating Foliar Ascorbic Acid Confers Greater Protection Against Ozone Than Increasing Avoidance, in the journal “Plant Physiology.”


Gallie’s previous research found that plants react to smog much like they react to drought, by closing pores (called stomata) present in their leaves. The closed pores protect plants from losing water and taking in ozone, but also prevent the production of sugars through photosynthesis, which are needed for the plant to grow.

“It’s clearly not an effective strategy to protect plants from the effects of long-term exposure to smog,” Gallie said.

Plants, he said, have two options to defend themselves from ozone. They can prevent ozone from entering the leaf by closing their stomata, or use the antioxidant qualities of vitamin C to detoxify the ozone that enters through open stomata and also protect the photosynthetic machinery in the leaf.

Studying acute and chronic ozone exposures, Gallie and Chen looked at which plants fared better, those with lower levels of vitamin C that closed their pores or those with higher levels of vitamin C, open pores, and higher levels of photosynthetic activity. Those with the higher levels of vitamin C fared better in the long run, in both instances, despite the fact that more ozone entered through the open pores of the leaf, Gallie said.

Gallie and Chen’s findings offer a clear direction for a strategy toward developing plants that will be able to grow and thrive in high-ozone environments such as cities and suburban areas.

“Because we’re seeing, especially in this country, the encroachment of urban areas into farm lands, we’re seeing an increased impact on agriculture. Moreover, ornamental plants used for urban and suburban landscaping are heavily affected by exposure to smog,” said Gallie.

The next step in Gallie’s research will focus on the apparent correlation between a plant’s increased vitamin C levels and increased photosynthetic activity.

“There seems to be multiple benefits of increasing the level of vitamin C in plants, including improving their tolerance to smog, improving photosynthesis, and improving their nutritional quality but more research is clearly needed,” he said.

The key question, at least in the near term, is to determine whether increased vitamin C and photosynthesis will result in greater crop yields, he added.

Ricardo Duran | EurekAlert!
Further information:
http://www.ucr.edu

More articles from Ecology, The Environment and Conservation:

nachricht 100 % Organic Farming in Bhutan – a Realistic Target?
15.06.2018 | Humboldt-Universität zu Berlin

nachricht What the size distribution of organisms tells us about the energetic efficiency of a lake
05.06.2018 | Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

Im Focus: Photoexcited graphene puzzle solved

A boost for graphene-based light detectors

Light detection and control lies at the heart of many modern device applications, such as smartphone cameras. Using graphene as a light-sensitive material for...

Im Focus: Water is not the same as water

Water molecules exist in two different forms with almost identical physical properties. For the first time, researchers have succeeded in separating the two forms to show that they can exhibit different chemical reactivities. These results were reported by researchers from the University of Basel and their colleagues in Hamburg in the scientific journal Nature Communications.

From a chemical perspective, water is a molecule in which a single oxygen atom is linked to two hydrogen atoms. It is less well known that water exists in two...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

A sprinkle of platinum nanoparticles onto graphene makes brain probes more sensitive

15.06.2018 | Materials Sciences

100 % Organic Farming in Bhutan – a Realistic Target?

15.06.2018 | Ecology, The Environment and Conservation

Perovskite-silicon solar cell research collaboration hits 25.2% efficiency

15.06.2018 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>