Navigation Links
Fast growth, low defense -- plants facing a dilemma
Date:1/28/2011

This release is available in German.

Plants are attacked by a multitude of insects and mammals. As defense against these herbivores they developed complex defense mechanisms over the course of evolution: spines, thorns, leaf hairs and a number of toxic chemical substances. For decades it has been controversially discussed whether the production of defense traits incurs costs to the plants. Now, using a new method the ecologists and plant biologists of the University of Zrich together with their American colleagues demonstrate these costs accurately in a Proceedings of the Royal Society article.

For their study, the researchers planted different knockout-mutants of the same genotype of the model plant Arabidopsis thaliana. They then harvested a subset of these plants in evenly distributed intervals to measure the biomass growth over the whole plant life. Mutants with suppressed defense mechanisms showed an increased growth rate Tobias Zst explains the result of his study. But the faster growth comes at an added cost: aphids reproduce faster on these plants than on slow growing plants with intact defense mechanisms. This is a result of the fact that fast growing plants provide more resources to the herbivore than slow growing plants in the same amount of time.

The study shows that natural resistance is often not compatible with fast growth. This finding is of great importance for agricultural crops: These crops have been selected for high yield and as a consequence have very low natural resistance to herbivores, consequentially requiring high input of insecticides.


'/>"/>

Contact: Tobias Zst
tobias.zuest@ieu.uzh.ch
41-446-356-105
University of Zurich
Source:Eurekalert

Page: 1

Related biology news :

1. Findings overturn old theory of phytoplankton growth, raise concerns for ocean productivity
2. Black or blue? Mulch color affects okra growth, yield
3. Newly identified growth factor promotes stem cell growth, regeneration
4. Master gene SRC-3 enables breast cancer growth, invasion
5. Plastics chemical retards growth, function of adult reproductive cells
6. ASM Biodefense and Emerging Diseases Research Meeting
7. Defense mechanism against bacteria and fungi deciphered
8. Scientists pinpoint key defense against parasite infection
9. SAIC Awarded $23 Million Task Order by Defense Biometrics Identity Management Agency
10. Lockheed Martin and ZyGEM Accelerate DNA Identification for Law Enforcement, Homeland Security and Defense Communities
11. Lockheed Martin and ZyGEM Accelerate DNA Identification for Law Enforcement, Homeland Security and Defense Communities
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/13/2016)... physicians supporting Medicaid patients in Central Florida ... telehealth thanks to a new partnership with higi.   ... can routinely track key health measurements, such as blood ... they opt in, share them with IMPOWER clinicians through ... location at no cost. By leveraging this data, IMPOWER ...
(Date:3/29/2016)... , March 29, 2016 LegacyXChange, ... LegacyXChange "LEGX" and SelectaDNA/CSI Protect are pleased to announce ... used in a variety of writing instruments, ensuring athletes ... originally created collectibles from athletes on LegacyXChange will be ... of the DNA. Bill Bollander , ...
(Date:3/22/2016)... Ontario , PROVO and ... Newborn Screening Ontario (NSO), which operates the ... for molecular testing, and Tute Genomics and UNIConnect, ... management technology respectively, today announced the launch of a ... next-generation sequencing (NGS) testing panel. NSO ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... , June 23, 2016   Boston Biomedical ... novel compounds designed to target cancer stemness pathways, ... been granted Orphan Drug Designation from the U.S. ... of gastric cancer, including gastroesophageal junction (GEJ) cancer. ... designed to inhibit cancer stemness pathways by targeting ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... (Yeast and Mold) microbial test has received AOAC Research Institute approval 061601. , ... tests introduced last year,” stated Bob Salter, Vice President of Regulatory and Industrial ...
(Date:6/23/2016)... ... June 23, 2016 , ... Supplyframe, the ... the Supplyframe Design Lab . Located in Pasadena, Calif., the Design Lab’s ... how hardware projects are designed, built and brought to market. , The Design ...
(Date:6/23/2016)... NEWPORT BEACH, Calif. , June 23, 2016 /PRNewswire/ ... offering new biological discoveries to the medical community, has ... and co-founder Matthew Nunez . "We ... provide us with the capital we need to meet ... funding will essentially provide us the runway to complete ...
Breaking Biology Technology: