Featured Research

from universities, journals, and other organizations

What genes help blossoms last longer?

Date:
May 25, 2010
Source:
USDA/Agricultural Research Service
Summary:
To help cut flowers and potted plants stay fresh longer, a plant physiologist is investigating the gene-controlled mechanisms of plants' aging.

ARS plant physiologist Cai-Zhong Jiang is using virus-induced gene silencing—which shows up as white patches on these purple petunias—to determine the function of genes involved in how long a plant flowers.
Credit: Photo by Peggy Greb

Some cut flowers and potted plants are better than others at fending off the aging process, known as senescence. To help tomorrow's blooms stay fresh longer, Agricultural Research Service (ARS) plant physiologist Cai-Zhong Jiang is investigating the gene-controlled mechanisms of plants' aging. Such probing may eventually reveal how to modify flowers' aging-linked genes, or the proteins that are products of those genes.

Related Articles


Jiang is with the ARS Crops Pathology and Genetics Research Unit at Davis, Calif.

One approach, known as "virus-induced gene silencing" or VIGS, is allowing Jiang and colleagues to determine the function of genes in aging plants. In the laboratory, the scientists work with a naturally occurring microbe known as the tobacco rattle virus, modifying it by inserting plant genes of interest into it. In any given experiment, some flowering plants will not be exposed to the virus, while others will be exposed to either the unmodified or the modified virus.

Exposure triggers the plants' natural defense mechanism, including attempts to quash, or silence, the virus. When that happens, the genes that were inserted into the modified virus are also silenced. By comparing all of the plants, the researchers may be able to determine the newly-silenced genes' functions

In early, proof-of-concept experiments, Jiang and University of California-Davis professor Michael S. Reid used petunia as their model plant. They showed that inserting a piece of a color-imparting gene into the virus resulted in white sectors or splotches on a normally purple-flowering petunia. The plant's defense system had silenced the gene's normal function, which was to create color, according to Jiang.

A second gene fragment that the team also inserted into the virus was similarly silenced in the oddly white splotches. That silenced gene would normally have been involved in producing ethylene, an aging compound. But the white splotches on the plants exposed to the modified virus produced less ethylene than unexposed plants, or plants exposed to the unmodified virus.

Though VIGS has been used elsewhere to study the functions of genes in tomato and tobacco, the experiments by Reid and Jiang were the first to use VIGS to explore senescence mechanisms in commercially grown cut flowers and potted plants.

Reid, Jiang, and former graduate student Jen-Chih Chen describe their work in the 2009 book Petunia: Evolutionary, Developmental, and Physiological Genetics.


Story Source:

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


Cite This Page:

USDA/Agricultural Research Service. "What genes help blossoms last longer?." ScienceDaily. ScienceDaily, 25 May 2010. <www.sciencedaily.com/releases/2010/05/100524114045.htm>.
USDA/Agricultural Research Service. (2010, May 25). What genes help blossoms last longer?. ScienceDaily. Retrieved April 22, 2015 from www.sciencedaily.com/releases/2010/05/100524114045.htm
USDA/Agricultural Research Service. "What genes help blossoms last longer?." ScienceDaily. www.sciencedaily.com/releases/2010/05/100524114045.htm (accessed April 22, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Wednesday, April 22, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Going Ape: Sierra Leone Chimpanzees Hail Ebola Retreat

Going Ape: Sierra Leone Chimpanzees Hail Ebola Retreat

AFP (Apr. 21, 2015) As money runs out at Tacugama Chimpanzee Sanctuary in Sierra Leone, around 85 chimps are facing homelessness. The centre closed when the Ebola epidemic was ravaging the country but now that closure is beginning to look permanent. Video provided by AFP
Powered by NewsLook.com
Blue Bell Recalls All Products

Blue Bell Recalls All Products

AP (Apr. 21, 2015) Blue Bell Creameries voluntary recalled for all of its products after two samples of chocolate chip cookie dough ice cream tested positive for listeria, a potentially deadly bacteria. Blue Bell&apos;s President and CEO issued a video statement. (April 21) Video provided by AP
Powered by NewsLook.com
Research Says Complex Tools Might Not Be 'Our Thing' Anymore

Research Says Complex Tools Might Not Be 'Our Thing' Anymore

Newsy (Apr. 21, 2015) The use of complex tools has often been seen as a defining characteristic of humanity, but that notion is now in question. Video provided by Newsy
Powered by NewsLook.com
Deepwater And Dolphins: The Oil Spill's Impact 5 Years On

Deepwater And Dolphins: The Oil Spill's Impact 5 Years On

Newsy (Apr. 20, 2015) Five years on, the possible environmental impact of the Deepwater Horizon spill includes a sustained die-off of bottlenose dolphins, among others. 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