Navigation Links
Novel electric signals in plants

Using ion-selective micro-electrodes electrical signals in plants moving from leaf to leaf could be measured. The speed of the signals spreading as voltage changes over cell membranes ranged from 5 to 10 cm per minute. The scientists discovered this new kind of electrical signal transmission system by applying a novel method: Filamentary electrodes were inserted through open stomata directly into the inner leaf tissue and then placed onto the cell walls (see picture). Stomata are microscopically small openings in the leaf surface which plants facilitate regulating evaporation and gas exchange.

The scientists found out that the new electrical signal they called "system potential" was induced and even modulated by wounding. If a plant leaf is wounded, the signal strength can be different and can be measured over long distances in unwounded leaves, depending on the kind and concentration of added cations (e.g. calcium, potassium, or magnesium). It is not the transport of ions across cell membranes that causes the observed changes in voltage transmitted from leaf to shoot and then to the next leaf, but the activation of so-called proton pumps. "This is the reason why the "system potential" we measured cannot at all be compared to the classic action potential as present in nerves of animals and also in plants", says Hubert Felle from Gieen University. Action potentials follow all-or-none characteristics: they are activated if a certain stimulus threshold is reached and then spread constantly. The "system potential", however, can carry different information at the same time: The strength of the inducing stimulus (wound signal) can influence the amplitude of the systemic signal as well as the effect of different ions. "We may be on the trail of an important signal transmission system that is induced by insect herbivory. Within minutes the whole plant is alerted and the plant's defense against its enemy is activated", says Axel Mithfer from the Max Planck Institute for Chemical Ecology in Jena.

The novel "system potential" was detected in five different plant species, among them agricultural crops like tobacco (Nicotiana tabacum), maize (Zea mays), barley (Hordeum vulgare), and field bean (Vicia faba).


Contact: Hubert H. Felle
Max Planck Institute for Chemical Ecology

Related biology news :

1. Novel veterinary procedure detecting life-threatening injuries touted
2. Forget the freezer: Research suggests novel way to control water behavior
3. Breaking the barrier: Discovery of anti-resistance factors and novel ocean drugs
4. Mayo Clinic researchers suspect a novel gene is causing restless legs syndrome in a large family
5. Fighting obesity and illness with a novel approach to nutrition
6. Novel technology could produce biofuel for around 0.50 a liter ($2.49 a gallon)
7. Novel technology could produce biofuel for around €0.50 a liter ($2.49 a gallon)
8. Studies point to novel target for treating arrhythmias
9. Novel technique changes lymph node biopsy, reduces radiation exposure
10. Novel technique changes lymph node biopsy, reduces radiaiton exposure
11. Salk researchers develop novel glioblastoma mouse model
Post Your Comments:
Related Image:
Novel electric signals in plants
(Date:11/9/2015)... , Nov. 09, 2015 ... the addition of the "Global Law ... their offering. --> ) ... "Global Law Enforcement Biometrics Market 2015-2019" ... Research and Markets ( ) has ...
(Date:11/2/2015)... 2015  SRI International has been awarded a contract ... services to the National Cancer Institute (NCI) PREVENT Cancer ... expertise, modern testing and support facilities, and analytical instrumentation ... toxicology studies to evaluate potential cancer prevention drugs. ... Cancer Drug Development Program is an NCI-supported pipeline to ...
(Date:10/29/2015)... Oct. 29, 2015 Daon, a global leader ... has released a new version of its IdentityX ... North America have already installed IdentityX ... includes a FIDO UAF certified server component ... to activate FIDO features. These customers include some of ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... HILLS, N.J. (PRWEB) , ... November 24, 2015 , ... ... as the recipient of the 2016 USGA Green Section Award. Presented annually since 1961, ... golf through his or her work with turfgrass. , Clarke, of Iselin, ...
(Date:11/24/2015)... ... November 24, 2015 , ... International Society for Pharmaceutical ... the premier annual events for pharmaceutical manufacturing: 2015 Annual Meeting. The conference took ... hosted the largest number of attendees in more than a decade. , ...
(Date:11/24/2015)... ... 24, 2015 , ... The Academy of Model Aeronautics (AMA), led by its ... as Multirotor Grand Prix, to represent the First–Person View (FPV) racing community. , FPV ... embraced this type of racing and several new model aviation pilots have joined the ...
(Date:11/24/2015)... Nov. 24, 2015  Twist Bioscience, a company ... Leproust, Ph.D., Twist Bioscience chief executive officer, will ... on December 1, 2015 at 3:10 p.m. Eastern ... City. --> --> ... Twist Bioscience is on Twitter. Sign up to ...
Breaking Biology Technology: