HOME >> BIOLOGY >> NEWS
Ecological Consequences Of Jasmonate-Induced Responses For Plants In Native Populations

cotine, increases after herbivore attack in the native, post-fire annual, Nicotiana attenuata, and is internally activated by the wound-hormone, jasmonic acid. The roots of plants were treated with the methyl ester of this hormone (methyl jasmonate; 500g suspended in 10 ml water, while control members of the pair were treated with 10 ml water) to elicit a response in one member of each of 745 matched pairs of plants growing in native populations in southwestern Utah (USA) with different probabilities of attack from herbivores (primarily rabbits and the larvae of the tobacco specialist, Manduca sexta).The lifetime production of viable seed was measured from all plants to determine the fitness consequences of jasmonate induction.

The results strongly support the cost-benefit model for inducible defenses. Jasmonate treatment significantly increased nicotine concentrations in the leaves of treated plants 22-54% above those of their control, water-treated counterparts. In populations where plants were being heavily attacked (populations IIA, B), nicotine concentrations of leaves from control plants were comparable to those of unattacked jasmonate-induced plants from the other populations, but the effect of jasmonate treatment was retained; clearly, the jasmonate treatment had not saturated the plants' nicotine response. How do these changes affect plant fitness as estimated by their lifetime viable seed production? The answer depends critically on the plant's environment, particularly, the likelihood of herbivore attack.

For plants in environments with high herbivory (the 2-year-old burns, populations IIA, B), the benefit of jasmonate-treatments could be readily seen. For example, in population IIA, 10 days after the treatment, 33% of the control plants had lost more than 40% of their leaf area to herbivores,
'"/>

Contact: Ian T. Baldwin
Baldwin@ice.mpg.de
49-3641-6436-59
Max-Planck-Gesellschaft
9-Jul-1998


Page: 1 2 3 4 5 6 7 8

Related biology news :

1. Ecological science for a crowded planet
2. Ecological success?
3. Ecological Society of America 88th annual meeting
4. Ecological effects of climate change include human epidemics
5. Ecological significance of tool-use in the woodpecker finch Cactospiza pallida
6. Ecological risks of GMOs come in unexpected ways, model shows
7. Energy departments Idaho lab teams with Russia to establish Ecological Biotrade facility
8. Ecological trends of food availability yield clues to Americans weight problem
9. The Geometry of Ecological Interactions: Simplifying Spatial Complexity
10. Ecological Society of America and the British Ecological Society to meet
11. Colorado State scientist is Ecological Society of America president

Post Your Comments:
(Date:10/30/2014)... 2014 – Bacteria in the gastrointestinal tract fulfill ... Yet, these same bacteria can induce strong inflammatory ... the gut and enter the bloodstream. , Although ... the body, chronic or systemic inflammation is linked ... established the involvement of inflammatory processes in the ...
(Date:10/29/2014)... who lose their hair as a consequence of chemotherapy ... improve the scalp cooling technology that prevents hair loss. ... being pioneered by global scalp cooling manufacturing company, Paxman ... biology department of the University of Huddersfield. , The ... who has a background in the pharmacology of cancer ...
(Date:10/29/2014)... on sunlight to make their food, but they also need ... scientists discovered a group of molecules in plants that shields ... Journal of the American Chemical Society , one team ... work. , Timothy Zwier and colleagues at Purdue University note ... can cause serious damage to plant DNA and, as a ...
Breaking Biology News(10 mins):Breakdown in gut barriers to bacteria may promote inflammation and craving in alcoholics 2New technology on the way to aid cancer suffers who lose their hair after chemotherapy 2
(Date:10/31/2014)... MA (PRWEB) October 31, 2014 Following ... hosting a free learning webinar to introduce its new ... standards directors and biostatisticians. , Launched in September, Formedix ... company's suite of clinical trial automation tools. For the ... a web browser. And by introducing Formations – a ...
(Date:10/31/2014)... York, NY (PRWEB) October 31, 2014 ... such as healthcare, construction, finance and consumer electronics ... For this reason, industry research firm IBISWorld has ... industry to its growing industry report collection. , ... develop software for biometric technologies such as fingerprint, ...
(Date:10/30/2014)... , Oct. 30, 2014  Ardelyx, Inc. ... company focused on cardio-renal, gastrointestinal and metabolic diseases, ... 2014 financial results on Thursday, November 6, 2014. ... host a live conference call and webcast at ... and provide a business update. The ...
(Date:10/30/2014)... 30, 2014 Rancho BioSciences , ... have manually curated public data source TCGA ... the data is now available for other oncology ... public and internal data sources for their Pharma, Government ... of the data that becomes more easily accessible. ...
Breaking Biology Technology:Formedix to Introduce "Revolutionary" Clinical Trial Automation Software with Learning Webinar 2Biometrics Scan Software in the US Industry Market Research Report Now Available from IBISWorld 2Biometrics Scan Software in the US Industry Market Research Report Now Available from IBISWorld 3Ardelyx to Report Third Quarter 2014 Financial Results on November 6, 2014 2Rancho BioSciences Manually Curated TCGA Data Sets Available 2
Cached News: