Featured Research

from universities, journals, and other organizations

UV-B Light Sensing Mechanism Discovered In Plant Roots

Date:
December 16, 2008
Source:
San Francisco State University
Summary:
Scientists have discovered that plant roots can sense UV-B light and have identified a specific gene that is a vital player in UV-B signaling, the communication between cells. The gene RUS1 measures UV-B light levels and passes this information on to other parts of the plant responsible for healthy development.

An Arabidopsis early seedling developing normally (left) compared with the same plant with a mutated RUS1 gene (right) which shows stunted growth.
Credit: SFSU

Scientists have discovered that plant roots can sense UV-B light and have identified a specific gene that is a vital player in UV-B signaling, the communication between cells.

Related Articles


A study published Dec. 8 in the Early Edition of PNAS reveals that the gene RUS1 measures UV-B light levels and passes this information on to other parts of the plant responsible for growth and development. A low dosage of UV-B light, for example the levels found in shady conditions or under fluorescent lighting, can provide important signals to the rest of the plant and is therefore beneficial to normal plant growth. It helps young plants stay on the right track of development and aids seedling morphogenesis, but too much UV-B light can be toxic.

The study found that plants with a mutated UV-B light sensor gene become hypersensitive to UV-B light and even under low intensity levels of UV-B light, their root growth is stunted and they fail to grow leaves. Therefore the RUS1 gene is responsible for ensuring that young seedlings develop normally even when their roots are exposed to UV-B light.

It's unusual that roots, normally covered in soil, should have sensors for UV-B light, but the RUS1 gene is crucial at the young seedling stage when a plant's roots are resting on the soil surface. Later in a plant's life, roots can be exposed after rainwash, geological movements or animal activity.

The discovery of RUS1 provides scientists with a platform to examine other key genes that receive UV-B light and translate light information into how the plant should develop.

The paper's corresponding author is Zheng-Hui He, professor of biology at San Francisco State University. In addition to He, co-authors include SF State researchers Hongyun Tong, Colin D. Leasure, Xuewen Hou, Gigi Yuen, and Winslow Briggs from the Carnegie Institute of Washington.


Story Source:

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


Cite This Page:

San Francisco State University. "UV-B Light Sensing Mechanism Discovered In Plant Roots." ScienceDaily. ScienceDaily, 16 December 2008. <www.sciencedaily.com/releases/2008/12/081208180238.htm>.
San Francisco State University. (2008, December 16). UV-B Light Sensing Mechanism Discovered In Plant Roots. ScienceDaily. Retrieved February 28, 2015 from www.sciencedaily.com/releases/2008/12/081208180238.htm
San Francisco State University. "UV-B Light Sensing Mechanism Discovered In Plant Roots." ScienceDaily. www.sciencedaily.com/releases/2008/12/081208180238.htm (accessed February 28, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Saturday, February 28, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

The Best Drinks for Your Health

The Best Drinks for Your Health

Buzz60 (Feb. 27, 2015) When it comes to health and fitness, there&apos;s lots of talk about what foods to eat, but there are a few liquids that can promote good nutrition. Krystin Goodwin (@krystingoodwin) has the healthiest drinks to boost your health! Video provided by Buzz60
Powered by NewsLook.com
Cherries, Snap Peas and More Tasty Spring Produce

Cherries, Snap Peas and More Tasty Spring Produce

Buzz60 (Feb. 27, 2015) From sweet cherries to sugar snap peas, spring is the peak season for some of the tastiest and healthiest produce. Krystin Goodwin (@Krystingoodwin) has the best seasonal fruits and veggies to spring in to good health! Video provided by Buzz60
Powered by NewsLook.com
The Best Foods to Battle Stress

The Best Foods to Battle Stress

Buzz60 (Feb. 26, 2015) If you&apos;re dealing with anxiety, there are a few foods that can help. Krystin Goodwin (@krystingoodwin) has the best foods to tame stress. Video provided by Buzz60
Powered by NewsLook.com
The Amazon Keeps Its Green Thanks To The Sahara Desert

The Amazon Keeps Its Green Thanks To The Sahara Desert

Newsy (Feb. 25, 2015) Satellite data shows the Amazon rainforest supports its lush flora with a little help from Sahara Desert dust. Video provided by Newsy
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