Navigation Links
What genes help blossoms last longer?

This release is available in Spanish.

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.

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.


Contact: Marcia Wood
United States Department of Agriculture-Research, Education, and Economics

Related biology news :

1. Gene regulation, not just genes, is what sets humans apart
2. Interaction of just 2 genes governs coloration patterns in mice
3. Muscle mass: Scientists identify novel mode of transcriptional regulation during myogenesis
4. Study finds blocking angiogenesis signaling from inside cell may lead to serious health problems
5. Smoking turns on genes -- permanently
6. Genes, Environment and Health Initiative invests in genetic studies, environmental monitoring
7. Hebrew SeniorLife researchers search for aging, osteoporosis genes
8. UT Southwestern researchers identify hundreds of genes controlling female fertility
9. Genes and environment grant funds close look at nature-nurture overlap in common diseases
10. Jumping genes could make for safer gene delivery system
11. Genes from the father facilitate the formation of new species
Post Your Comments:
(Date:11/10/2015)... NEW YORK , Nov. 10, 2015 /PRNewswire/ ... refers to behavioral biometrics that helps to identify ... prevent fraud. Signature is considered as the secure ... for the identification of a particular individual because ... offers more accurate results especially when dynamic signature ...
(Date:11/9/2015)... , Nov. 9, 2015  Synaptics Inc. (NASDAQ: ... today announced broader entry into the automotive market with ... match the pace of consumer electronics human interface innovation. ... are ideal for the automotive industry and will be ... Europe , Japan ...
(Date:11/2/2015)... MENLO PARK, Calif. , Nov. 2, 2015 /PRNewswire/ ... to $9 million to provide preclinical development services to ... Under the contract, SRI will provide scientific expertise, modern ... a wide variety of preclinical pharmacology and toxicology studies ... --> --> The PREVENT Cancer Drug ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... Malaysia , Nov. 24, 2015  Asia-Pacific ... contract research organisation (CRO) market. The trend of ... in lower margins but higher volume share for ... capacity and scale, however, margins in the CRO ... Organisation (CRO) Market ( ), finds ...
(Date:11/24/2015)... SUNNYVALE, Calif. , Nov. 24, 2015 ... executives will be speaking at the following conference, and ... New York, NY      Tuesday, December 1, ... New York, NY      Tuesday, December 1, ...      Piper Jaffray Healthcare Conference, New York, NY ...
(Date:11/24/2015)... , Nov. 24, 2015 /CNW/ - iCo Therapeutics ("iCo" ... reported financial results for the quarter ended September ... in Canadian dollars and presented under International Financial ... States ," said Andrew Rae , ... regarding iCo-008 are not only value enriching for ...
(Date:11/24/2015)... ... November 24, 2015 , ... International Society for Pharmaceutical Engineering ... premier annual events for pharmaceutical manufacturing: 2015 Annual Meeting. The conference took place ... the largest number of attendees in more than a decade. , “The ...
Breaking Biology Technology: