Navigation Links
Plants have a double line of defence

inside the compartments. If a fungus tries to invade a plant cell, the peroxisomes are led over to the entry site by the attached PEN2 protein. One or more sugar molecules can be separated from another cell component through the enzyme activities of the PEN2 enzyme, a glycosyl hydrolase. The substance released by it appears to have a fungicidal effect, which kills the pathogen.

The researchers, on the other hand, observed that when PEN2 is missing, the plants become more susceptible not only to grass powdery mildew fungi but also other pests ?for example, the pathogens causing late potato blight. PEN2 is therefore a basic component of the plant's immune system with a broad range of effects.

However if PEN2 is missing, the plant is not completely helpless against fungal diseases. There is still another line of defence which they have to get through. If PEN2 is missing, the plant takes a drastic step: the cell dies together with its attacker, which protects the neighbouring plant tissue from infection.

In this deadly line of defence, very different proteins play a key role ?particularly EDS1, PAD4 and SAG101. They were already known to researchers in other species of plants, which identify molecular traits only present in parasites by using immune receptors both on the cell surface and inside the cell. Only if this second mechanism also fails can the originally non-virulent grass powdery mildew fungus colonise the plant.

The Max Planck research has now demonstrated that the nonhost resistance of plants develops out of a defence system with at least two steps. These steps determine whether a plant is susceptible to a disease or not. The redundancy of the defence layers and the wide-ranging effects of PEN2 explain why, in nature, nonhost resistance is a durable and broadly effective defence mechanism. If a building block is missing from one defence layer, its function will be taken over by components of the next layer.

Until now,
'"/>

Source:Max-Planck-Gesellschaft


Page: 1 2 3

Related biology news :

1. Quantum Dots Research Leads to New Knowledge about Protein Binding in Plants
2. Plants, animals share molecular growth mechanisms
3. Plants respond similarly to signals from friends, enemies
4. Plants defy Mendels inheritance laws, may prompt textbook changes
5. Study: Plants use dual defense system to fight pathogens
6. Plants discriminate between self and non self
7. Prozac for future Plants on Mars
8. Plants reveal a secret and bring researchers nearer a cleaner future
9. Plants, too, have ways to manage freeloaders
10. Plants give pests sock in the gut
11. Plants used to detect gas leaks, from outer space!
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Plants have double line defence

(Date:12/17/2014)... , Dec. 16, 2014 Research and ... the addition of the "Global Chemical Sensor ... http://photos.prnewswire.com/prnh/20130307/600769 ... the increasing demand for medical sensors in biomedical ... data for quick and correct diagnosis during surgical ...
(Date:12/15/2014)... , Dec. 12, 2014 Research and ... the addition of the "Global Facial Recognition ... http://photos.prnewswire.com/prnh/20130307/600769 ... identification of individuals. Facial recognition system measures the ... nose, jaw edges, mouth, and the distance between ...
(Date:12/11/2014)... 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/9ql3kr/biometrics_market ) has announced the addition of ... report to their offering. One ... adoption of multimodal biometric systems. Multimodal biometric systems ... for verification and identification purposes. This helps to ...
Breaking Biology News(10 mins):Global Chemical Sensor Market 2015-2019: Key Vendors are Abbott Laboratories, Bayer, Hoffmann La-Roche, Johnson & Johnson, NGK Spark Plugs and Robert Bosch 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 3Biometrics Market in India 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... down of their woody material, could be the key to ... researchers who add that the approach could also help turn ... major component of woody plant material, is woven in with ... gusts of wind and microbial attack. However, this protective barrier ...
... socioeconomic status and children,s educational environment. Nevertheless, some ... of high parental education and support for learning ... psychologists Angela Friend, John C. DeFries and Richard ... on reading disability, the most commonly identified learning ...
... 22, 2008, Cambridge, UK A new report demonstrates ... hand in seeking out bacteria in chronic infections. ... that can cause severe illness and death. Listeria ... infection is the third most common cause of bacterial ...
Cached Biology News:Modified plants may yield more biofuel 2The effect of parental education on the heritability of children's reading disability 2New research lights up chronic bacterial infection inside bone 2
(Date:12/19/2014)...  Decision Resources Group finds that the ... moderately through 2023 as the aging population, increasing adoption ... biomaterials all spur procedure volumes. Growth will be particularly ... and India , where ... for a larger proportion of the population. ...
(Date:12/19/2014)... -- Relmada Therapeutics, Inc. (OTCQB: RLMD), a clinical-stage company ... announced the results of its annual general meeting of ... year in Relmada,s history and it set the stage ... Sergio Traversa , chief executive officer of Relmada. "Over ... human resource and clinical development objectives that position Relmada ...
(Date:12/17/2014)... “Never say, ‘I cannot do ... Department of Physics, advises young women pursuing careers ... SPIE Women in Optics 18-month planner ... ask questions.” , In the annual planner, women ... ranging from university professor and laboratory researcher to ...
(Date:12/17/2014)... 2014 Once more, EMAAR has ... packaged waste water treatment plant to phase one of ... (KAEC). Two years ago Bioshaft successfully supplied and operated ... two residential towers with an occupancy of 900 residences. ... million gallons per day and was signed on September ...
Breaking Biology Technology:Asia Pacific Dental Biomaterial Market Will Grow Strongly Through 2023 2Asia Pacific Dental Biomaterial Market Will Grow Strongly Through 2023 3Relmada Therapeutics Announces Results of Annual Shareholders Meeting 2Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 2Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 3
... ACCESS PHARMACEUTICALS, INC. (OTC Bulletin Board: ... proprietary polymer-based oral mucositis product has been launched ... countries by its European commercial partner, SpePharm, a ... of high medical value medicines in supportive and ...
... Micromet, Inc. (Nasdaq: MITI ), a ... of cancer, inflammation and autoimmune diseases, yesterday presented data ... Cancer Research (AACR) in Denver, Colorado, showing that its ... Cancer stem cells are thought to be responsible for ...
... Research and Manufacturers of America (PhRMA) and the national ... to promote three key policies designed to help achieve ... Families USA will work together and will reach out ... incorporated in the healthcare reform proposals to be considered ...
Cached Biology Technology:Access Pharmaceuticals Announces the European Launch of MuGard(TM) by its European Partner, SpePharm 2Access Pharmaceuticals Announces the European Launch of MuGard(TM) by its European Partner, SpePharm 3Micromet Presents Data at AACR Meeting Showing Elimination of Colorectal Cancer Stem Cells by BiTE Antibody MT110 2Micromet Presents Data at AACR Meeting Showing Elimination of Colorectal Cancer Stem Cells by BiTE Antibody MT110 3Micromet Presents Data at AACR Meeting Showing Elimination of Colorectal Cancer Stem Cells by BiTE Antibody MT110 4PhRMA, Families USA Jointly Promote Measures to Ensure Quality, Affordable Healthcare Coverage 2PhRMA, Families USA Jointly Promote Measures to Ensure Quality, Affordable Healthcare Coverage 3
...
...
... Mouse A-20 cells were cultured in RPMI ... the log phase of growth. In order ... cells were fixed in acetone-methanol. The cells ... coated slide, with each wells surface specifically treated ...
... proteases/caspases initiates apoptosis in mammalian cells. ... provides a simple and convenient means for ... in intact cells. The assay utilizes ... linked to rhodamine 110 (D2R), a reported ...
Biology Products: