HOME >> BIOLOGY >> NEWS
Elevated CO2 in atmosphere weakens defenses of soybeans to herbivores

In research to be presented at the annual meeting of the American Society of Plant Biologists in Chicago (July 7-11, 2007), scientists will show that elevated CO2 may negatively impact the relationship between some plants and insects. Elevated CO2 is considered to be a serious catalyst of global change. Its effects can be felt throughout the ecosystem, including the insect-plant food chain link. Safeguarding highly-usable crops is of great importance to many local and national economies.

Many plants have inherent enzyme-based defenses that are released during insect attack. This study found that when soybeans (Glycine max) were exposed to elevated amounts of CO2 the plants became more susceptible to attack by Japanese beetles (Popillia japonica). Furthermore, as these beetles consumed the weakened soybeans, the insects invasive abilities were intensified.

Dr. Jorge Zavala, Sr. of the Institute for Genomic Biology at the University of Illinois, and his colleagues conducted tests in which they evaluated this herbivorous attack-defense cycle. They studied soybeans grown in traditional field conditions but with additional exposure to ambient CO2. The results showed that the amount of cysteine proteinase inhibitors (CystPls) expressed in the genes decreased when soybeans were exposed to elevated CO2. CystPls is naturally produced by soybeans when they are under insect attack. It inhibits further attack once the invader has ingested it.

Our results suggest that elevated CO2 increased the susceptibility of soybean to invasive insects by down-regulating the expression of hormones related with defense, which down-regulate the important defense CystPls against beetles, Zavala said.

Zavala also explained, Under natural field conditions, elevated CO2 not only increased susceptibility of soybean to herbivory by the invasive species Japanese beetle, but also enhanced the performance of these beetles.

The investigatio
'"/>

Contact: Brian Hyps
bhyps@aspb.org
240-354-5160
American Society of Plant Biologists
6-Jul-2007


Page: 1 2

Related biology news :

1. Elevated autoantibodies linked to preeclampsia
2. Elevated atmospheric CO2 increases soil carbon
3. Elevated temperature enhances success of viral cancer therapy
4. Elevated inflammatory enzyme, Lp-PLA2, significantly linked to ischemic stroke
5. Bacterial switch gene regulates how oceans emit sulfur into atmosphere
6. Tropical forests leak nitrogen back into atmosphere, say scientists
7. Mercury in atmosphere could be washed out more easily than earlier believed
8. Methane gyrations last 2,000 years show human influnece on atmosphere
9. U. of Colorado study shows early Earth atmosphere hydrogen-rich, favorable to life
10. Epilepsy drug eases symptoms of inherited disorder that weakens muscles
11. Aggression-related gene weakens brains impulse control circuits

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Elevated atmosphere weakens defenses soybeans herbivores

(Date:4/16/2014)... store memories improves during childhood, associated with structural ... prefrontal and parietal cortices. New research from UC ... at this crucial time. Eventually, that could give ... transition into and during adolescence and affect memory, ... in the middle of the brain, the hippocampus ...
(Date:4/16/2014)... Dr. Klaus Aktories and Dr. Panagiotis Papatheodorou from the ... the University of Freiburg have discovered the receptor responsible ... perfringens into the cell. The TpeL toxin, which ... that causes gas gangrene and food poisoning. It is ... germs of the genus Clostridium . The toxins ...
(Date:4/15/2014)... 15, 2014, Irvine, Calif. UC Irvine neurobiologists have ... results when transplanted into the brains of mice with ... trial is published in the journal Stem Cells ... shown to work in two different mouse models. ... of dementia, is associated with accumulation of the protein ...
Breaking Biology News(10 mins):How kids' brain structures grow as memory develops 2Gate for bacterial toxins found 2UCI study finds modified stem cells offer potential pathway to treat Alzheimer's disease 2
(Date:1/15/2014)... 2014 The Microcompetition with Foreign DNA ... disease. One of these latent viruses is the Epstein ... rheumatoid arthritis (RA). Rheumatoid arthritis (RA) is a chronic ... by the theory, a study found that RA patients ... (1). , What is Microcompetition? , Dr. Hanan ...
(Date:1/15/2014)... Sunnyvale, CA (PRWEB) January 15, 2014 ... of high throughput research solutions, today announced that ... companies, has received delivery of Freeslate’s CM ... form screening. , Lupin, headquartered in Mumbai, ... quality, affordable generic and branded formulations and Active ...
(Date:1/14/2014)... (PRWEB) January 14, 2014 Date: Friday, ... p.m. , Location: Warrington Country Club, 1360 Almshouse Road, ... Foundation, the only national nonprofit organization solely dedicated to ... quality of life for those affected worldwide, will host ... Warrington Country Club in Warrington, Pa. , Each ...
(Date:1/14/2014)... , Jan. 14, 2014  3D Communications, a leading provider ... major scientific, regulatory, business, and media events in ... , today announced its former associate Virginia Cox , ... office. Virginia Cox re-joins ... Commissioner for the Office of External Affairs at the U.S. ...
Breaking Biology Technology:Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 2Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 3Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Hepatitis B Foundation to Host Annual Crystal Ball Gala 2Former FDA Associate Commissioner Returns To 3D Communications 2
Cached News: