Featured Research

from universities, journals, and other organizations

Gene suppression can reduce cold-induced sweetening in potatoes

Date:
October 15, 2012
Source:
USDA/Agricultural Research Service
Summary:
Preventing activity of a key enzyme in potatoes could help boost potato quality by putting an end to cold-induced sweetening, according to U.S. Department of Agriculture scientists.

Preventing activity of a key enzyme in potatoes could help boost potato quality by putting an end to cold-induced sweetening, according to U.S. Department of Agriculture (USDA) scientists.

Cold-induced sweetening, which occurs when potatoes are put in long-term cold storage, causes flavor changes and unwanted dark colors in fried and roasted potatoes. But long-term cold storage is necessary to maintain an adequate supply of potatoes throughout the year.

Agricultural Research Service (ARS) scientists found that during cold storage, an enzyme called invertase causes changes in potato sugars -- more accumulation of sucrose and a corresponding increase in the amount of glucose and fructose in tubers stored at very low temperatures.

At the ARS Vegetable Crops Research Unit in Madison, Wis., plant physiologist Paul Bethke, geneticist Shelley Jansky, and technician Andy Hamernik used a recently developed technology to show that decreasing the activity of invertase is sufficient to enable cold storage of potatoes without compromising the appearance of potato chips or the growth characteristics of the potato plants.

Bethke and his colleagues are using molecular tools to improve understanding of what is controlling the process of cold-induced sweetening. Potatoes are sensitive to their environment and highly sensitive to low temperatures, and respond to these temperatures by producing certain sugars called "reducing sugars," primarily glucose and fructose. When chips or fries are made from these potatoes, they tend to be dark-colored and bitter. The scientists' research paper in Plant Physiology provides a proof of concept that the invertase enzyme is critically important in the process.

However, invertase's level of importance has never been clear, because there are other biochemical steps that might also contribute, according to Bethke.

Read more about this research in the October 2012 issue of Agricultural Research magazine: http://www.ars.usda.gov/is/AR/archive/oct12/fruits1012.htm

ARS is USDA's principal intramural scientific research agency, and the research supports the USDA priority of promoting international food security.


Story Source:

The above story is based on materials provided by USDA/Agricultural Research Service. The original article was written by Sharon Durham. Note: Materials may be edited for content and length.


Journal Reference:

  1. P. B. Bhaskar, L. Wu, J. S. Busse, B. R. Whitty, A. J. Hamernik, S. H. Jansky, C. R. Buell, P. C. Bethke, J. Jiang. Suppression of the Vacuolar Invertase Gene Prevents Cold-Induced Sweetening in Potato. Plant Physiology, 2010; 154 (2): 939 DOI: 10.1104/pp.110.162545

Cite This Page:

USDA/Agricultural Research Service. "Gene suppression can reduce cold-induced sweetening in potatoes." ScienceDaily. ScienceDaily, 15 October 2012. <www.sciencedaily.com/releases/2012/10/121015131809.htm>.
USDA/Agricultural Research Service. (2012, October 15). Gene suppression can reduce cold-induced sweetening in potatoes. ScienceDaily. Retrieved August 28, 2014 from www.sciencedaily.com/releases/2012/10/121015131809.htm
USDA/Agricultural Research Service. "Gene suppression can reduce cold-induced sweetening in potatoes." ScienceDaily. www.sciencedaily.com/releases/2012/10/121015131809.htm (accessed August 28, 2014).

Share This




More Plants & Animals News

Thursday, August 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Killer Amoeba Found in Louisiana Water System

Killer Amoeba Found in Louisiana Water System

AP (Aug. 28, 2014) State health officials say testing has confirmed the presence of a killer amoeba in a water system serving three St. John the Baptist Parish towns. (Aug. 28) Video provided by AP
Powered by NewsLook.com
Raw: Australian Sheep Gets Long Overdue Haircut

Raw: Australian Sheep Gets Long Overdue Haircut

AP (Aug. 28, 2014) Hoping to break the record for world's wooliest, Shaun the sheep came up 10 pounds shy with his fleece weighing over 50 pounds after being shorn for the first time in years. (Aug. 28) Video provided by AP
Powered by NewsLook.com
Minds Blown: Scientists Develop Fish That Walk On Land

Minds Blown: Scientists Develop Fish That Walk On Land

Newsy (Aug. 28, 2014) Canadian scientists looking into the very first land animals took a fish out of water and forced it to walk. Video provided by Newsy
Powered by NewsLook.com
Fake Dogs Scare Real Geese from Wis. Park

Fake Dogs Scare Real Geese from Wis. Park

AP (Aug. 28, 2014) Parks officials in Stevens Point, Wisconsin had a fowl problem. Canadian Geese were making a mess of a park, so officials enlisted cardboard versions of man's best friend. (Aug. 28) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins