Featured Research

from universities, journals, and other organizations

Process That Regulates Seed Germination Identified

Date:
March 18, 2009
Source:
Purdue University
Summary:
Researchers have determined a process that regulates activity of genes that control seed germination and seedling development. They discovered the step involved in keeping seeds from germinating in adverse conditions such as freezing temperatures or drought, a factor in the survival of plant species.

Purdue University researchers have determined a process that regulates activity of genes that control seed germination and seedling development.
Credit: iStockphoto

Purdue University researchers have determined a process that regulates activity of genes that control seed germination and seedling development.

Related Articles


Mike Hasegawa, the Bruno C. Moser Distinguished Professor of Horticulture and Landscape Architecture, and Kenji Miura, a former Purdue postdoctoral researcher and now an assistant professor at Tsukuba University in Japan, discovered the step involved in keeping seeds from germinating in adverse conditions such as freezing temperatures or drought, a factor in the survival of plant species.

The work, which was published March 11 in the early online version of the Proceedings of the National Academy of Sciences, is part of ongoing research that has uncovered that similar processes affects a plant's freeze tolerance and absorption of phosphate.

"We've found the process, called sumoylation, is involved in the regulation of some major agricultural traits," Hasegawa said. "It is fundamental, basic research like this that allows us to understand how plants respond to hormones and environmental conditions."

Seeds produce a hormone called abscisic acid, or ABA, that prevents germination. When environmental factors such as temperature are not optimal for seed germination, ABA levels are high, which causes production of higher levels of a protein called ABI5. When the ABI5 protein is active, it switches on genes that prevent germination.

Hasegawa's research showed that when a SUMO peptide is attached to the ABI5 protein, the protein becomes inactive, switching off the genes that prevent germination and seedling development.

"A single stimulus such as ABA affects transcription factors, which are major controllers of genes involved in complex processes such as seed germination," Hasegawa said. "Sumoylation seems to be an important process in the control of significant plant characteristics."

Hasegawa said that the ABI5 protein can become active again, halting germination and seedling development if condition are no longer optimal. When conditions change to make plant development possible, the protein can once again be deactivated.

The National Science Foundation and the U.S. Department of Agriculture have funded the research in Hasegawa's laboratory. Hasegawa's next step is to determine how the sumoylation process leads to gene suppression and expression.


Story Source:

The above story is based on materials provided by Purdue University. Note: Materials may be edited for content and length.


Cite This Page:

Purdue University. "Process That Regulates Seed Germination Identified." ScienceDaily. ScienceDaily, 18 March 2009. <www.sciencedaily.com/releases/2009/03/090311170637.htm>.
Purdue University. (2009, March 18). Process That Regulates Seed Germination Identified. ScienceDaily. Retrieved March 28, 2015 from www.sciencedaily.com/releases/2009/03/090311170637.htm
Purdue University. "Process That Regulates Seed Germination Identified." ScienceDaily. www.sciencedaily.com/releases/2009/03/090311170637.htm (accessed March 28, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Saturday, March 28, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Lioness Has Rare Five-Cub Litter

Raw: Lioness Has Rare Five-Cub Litter

AP (Mar. 27, 2015) — A lioness in Pakistan has given birth to five cubs, twice the usual size of a litter. Queen gave birth to two other cubs just nine months ago. (March 27) Video provided by AP
Powered by NewsLook.com
Jockey Motion Tracking Reveals Racing Prowess

Jockey Motion Tracking Reveals Racing Prowess

Reuters - Innovations Video Online (Mar. 26, 2015) — Using motion tracking technology, researchers from the Royal Veterinary College (RVC) are trying to establish an optimum horse riding style to train junior jockeys, as well as enhance safety, health and well-being of both racehorses and jockeys. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Bear Cubs Tumble for the Media

Bear Cubs Tumble for the Media

Reuters - Light News Video Online (Mar. 26, 2015) — Two Andean bear cubs are unveiled at the U.S. National Zoo in Washington, D.C. Alicia Powell reports. Video provided by Reuters
Powered by NewsLook.com
Botswana Talks to End Illegal Wildlife Trade

Botswana Talks to End Illegal Wildlife Trade

AFP (Mar. 25, 2015) — Experts are gathering in Botswana to try to end the illegal wildlife trade that is decimating populations of elephants, rhinos and other threatened species. Duration: 01:05 Video provided by AFP
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:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

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