Navigation Links
Defenseless plants arm themselves with metals

en defense mechanism found in nearly every other plant species. Thlaspi plants live in soils naturally enriched in nickel, and when growing in their natural habitat, are not any more susceptible to pathogens than similar plants growing nearby.

When grown in the absence of metal, however, these plants are defenseless against diseases like powdery mildew, a common fungal infection that most other plants fight off with ease.

In most plants, exposure to powdery mildew and other pathogens triggers the plant defense pathway, a series of biochemical events that occur in succession and help the plant resist infection. A molecule called salicylic acid - a common plant compound and the active ingredient in pharmaceuticals like aspirin and acne medications - governs this pathway.

When faced with a fungus or bacteria, most plants turn up their production of salicylic acid, which then interacts with other molecules in the plant, eventually turning on the genes that produce the proteins involved in fighting infection. These infection-fighting proteins also turn off salicylic acid production, a phenomenon known as negative feedback. In this way, plants can turn the pathogen defense pathway on and off as needed.

Most plants maintain very low levels of salicylic acid in their tissues unless they are fighting an infection. Metal hyperaccumulators, however, have significantly elevated salicylic acid in their tissues all the time.

In the current study, Salt and his colleagues compared salicylic acid levels in both the hyperaccumulator Thlaspi and the common lab plant Arabadopsis, which does not accumulate metal. They also compared fungal infection rates in both types of plants when grown with or without exposure to the metal nickel.

They found significantly higher levels of salicylic acid in the hyperaccumulator compared to the non-accumulator. In addition, while Thlaspi thrived in metal-enriched soil, it succumbed to a severe fungal infe
'"/>

Source:Purdue University


Page: 1 2 3 4

Related biology news :

1. Emory Eye Center Implants Its First Retinal Chips In Patients With Retinitis Pigmentosa
2. Antibodies from plants protect against anthrax
3. New RNA polymerase discovered in plants
4. Transgenic plants remove more selenium from polluted soil than wild plants, new tests show
5. Scientists discover how plants disarm the toxic effects of excessive sunlight
6. At long last, scientists figure out how plants grow
7. Precise Timing Enabled Pig-to-rat Transplants To Cure Diabetes
8. Engineers improve plastics potential for use in implants by linking it to biological material
9. Innovative coating could give medical implants a longer life
10. Mechanism for the captation of nutrients in plants- unknown to date
11. Its electric: Cows show promise as powerplants
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Defenseless plants arm themselves with metals

(Date:7/30/2014)... potential effects of climate change on the world,s ... wrong factors, according to a new paper by ... University of Queensland, and other organizations. The authors ... missing the point when it comes to climate ... change scientists focus on the "direct" threats of ...
(Date:7/30/2014)... Society of America (ESA) has elected ten new Fellows ... Fellow acknowledges outstanding contributions to entomology in one or ... The following Fellows will be recognized during Entomology 2014 ... held November 16-19, 2014 in Portland, Oregon. , ... the Department of Plant, Soil and Entomological Sciences at ...
(Date:7/30/2014)... joint venture between The University of Texas at San ... Center at San Antonio, has selected the winners of ... from UTSA and Lei Huang from the Health Science ... engineered ferritins for tracking and protecting neural stem cells ... focused on finding a treatment for stroke through stem ...
Breaking Biology News(10 mins):Conservation scientists asking wrong questions on climate change impacts on wildlife 2Entomological Society of America recognizes 2014 fellows 2Entomological Society of America recognizes 2014 fellows 3Entomological Society of America recognizes 2014 fellows 4Entomological Society of America recognizes 2014 fellows 5Entomological Society of America recognizes 2014 fellows 6Entomological Society of America recognizes 2014 fellows 7Entomological Society of America recognizes 2014 fellows 8Entomological Society of America recognizes 2014 fellows 9Entomological Society of America recognizes 2014 fellows 10Entomological Society of America recognizes 2014 fellows 11Entomological Society of America recognizes 2014 fellows 12Entomological Society of America recognizes 2014 fellows 13Entomological Society of America recognizes 2014 fellows 14Entomological Society of America recognizes 2014 fellows 15Entomological Society of America recognizes 2014 fellows 16Entomological Society of America recognizes 2014 fellows 17
... March 1 issue of G&D, Dr. Christopher Fasano (Memorial ... into the effective generation of neural stem cells outside ... demonstrates that the polycomb group protein, Bmi-1, maintains forebrain ... and embryonic forebrain neural progenitor cells increases stem cell ...
... since insects developed a taste for vegetation, plants have ... their neighbors for light to grow, or, invest directly ... of scientists at the Salk Institute for Biological Studies ... a la Agronoma (IFEVA) has discovered how plants weigh ...
... immunodeficiency virus (HIV) adapts so well to the body,s ... pace with the ever-changing immunological profile of the virus, ... Birmingham (UAB) and the University of Oxford in England. ... adapt by spelling out at least 14 different "escape ...
Cached Biology News:Understanding natural crop defenses 2Understanding natural crop defenses 3HIV adapts to 'escape' immune response 2
(Date:7/30/2014)... (PRWEB) July 30, 2014 While ... in health services research for a relatively long ... in interest regarding the use of these ‘big ... conditions. , By combining today’s powerful computer technology ... digital era, ‘big data’ holds significant promise for ...
(Date:7/30/2014)... With the accelerated aging of ... expenditure as well as the improved medical care ... reagent industry has been developing quickly, especially in ... Chinese in vitro diagnostics market size reached RMB22.98 ... vitro diagnostic reagents. , Read complete report ...
(Date:7/30/2014)... AZ (PRWEB) July 30, 2014 ... State-of-the-art facility and complementary therapies brings comprehensive cancer ... foot, state-of-the-art Yuma Regional Cancer Center has officially ... 2012, the program includes services such as open, ... massage therapy, American Cancer Society Resource Center, hematology, ...
(Date:7/30/2014)...   Epic Sciences, Inc. ("Epic"), a private ... personalize and advance the treatment and management of cancer, ... as chairman of Epic,s board of directors. Mr. ... (formerly Invitrogen). Mr. Lucier joins Epic,s board of directors ... cell analysis platform with special focus on the development ...
Breaking Biology Technology:Leveraging ‘Big Data’ - Methodological Considerations in Health Services Research, New Webinar Hosted by Xtalks 2China Diagnostic Reagent Industry Report, 2013-2016 | Researchmoz 2China Diagnostic Reagent Industry Report, 2013-2016 | Researchmoz 3Sate-of-the-Art Yuma Regional Cancer Center Officially Opens 2Epic Sciences Appoints Greg Lucier as Chairman of the Board of Directors 2Epic Sciences Appoints Greg Lucier as Chairman of the Board of Directors 3
... the University of Helsinki, Finland, has succeeded in producing ... is reduced to a nano-scale (one nanometre being one ... undergo substantial changes. Unlike in bulk materials, in nanoparticles ... the number of atoms inside the material, which, among ...
... Corporation (Amex: ETC ) ("ETC" or ... will be exhibiting at the upcoming APWCA 2009 ... (APWCA) 2009 National Conference will be held April ... Philadelphia, Center City. The APWCA provides cutting-edge education ...
... Portfolio LAKE FOREST, Ill., March 16 ... equity firm focused exclusively on the healthcare ... CorePharma LLC ("CorePharma") has completed the acquisition ... Leucovorin Calcium tablets are the generic equivalent ...
Cached Biology Technology:Paper electrified by copper particles 2Environmental Tectonics Corporation Announces Participation at APWCA National Conference 2Environmental Tectonics Corporation Announces Participation at APWCA National Conference 3RoundTable Healthcare Partners Facilitates Product Acquisition for CorePharma 2
Request Info...
Form: Ready to use Applications: ELISA...
... supports that retain stiffness in liquids, protect ... segments on each strip have chemically bonded ... charts provide clear comparison. Full-range strips (0 ... packs of 100; each strip is approximately ...
... Bench-Top Open System Chemistry Analyzer for General Chemistries, Specialty Chemistries, QC, Reagent Development, Pharmaceutical ... grating, diode spectrophotometer over 30 user-selectable wavelengths. ... ... ...
Biology Products: