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:7/31/2014)... The enormous conflagration known as the Rim Fire was ... among mature trees, when it entered the backcountry of ... August 2013. But inside the park, the battle began ... management decisions and drought can combine to fuel large, ... park, it eventually encountered lands where fire had been ...
(Date:7/31/2014)... LA Dr. Oren Tessler, Assistant Professor of Clinical ... of Medicine, is part of a team of plastic ... using a method to screen and select patients for ... of the patients who underwent this surgery to decompress ... got a bonus cosmetic eyelid surgery. The study, which ...
(Date:7/31/2014)... Hibiscus flowers- they are an iconic symbol of ... in the landscape. Some, like Hawaii,s State Flower- ... Only a relatively few botanists and Hawaiian conservation ... and intriguing related group of plants known as ... Brother of Hibiscus species are in fact highly ...
Breaking Biology News(10 mins):The Rim Fire 1 year later: A natural experiment in fire ecology and management 2The Rim Fire 1 year later: A natural experiment in fire ecology and management 3The Rim Fire 1 year later: A natural experiment in fire ecology and management 4The Rim Fire 1 year later: A natural experiment in fire ecology and management 5Surgeons report significant migraine relief from cosmetic eyelid surgery technique 2Brother of Hibiscus is found alive and well on Maui 2
(Date:7/31/2014)... CollabRx, Inc. (NASDAQ: CLRX), a leading ... oncology, today announced that it will hold an investor ... Company's financial results for the first quarter of fiscal ... in the current fiscal year. , The dial-in number ... 14, 2014, at 5 p.m. EDT (2 p.m. PDT) ...
(Date:7/31/2014)... 2014 Senomyx , Inc. (NASDAQ: ... proprietary taste science technologies to discover, develop, and ... and ingredient supply industries, today reported financial results ... the second quarter with $33.6 million in cash ... the past quarter Senomyx achieved another important milestone ...
(Date:7/31/2014)...  Smith & Nephew (LSE:SN, NYSE: ... announced its entry into the forefoot market with ... System. Comprised of three separate repair options, the ... repair and reconstruction, a metatarsal osteotomy guide, and ... fusion, also known as hammer toe correction. ...
(Date:7/31/2014)... and SHENZHEN, China , July ... today the purchase of an Irys™System by ... selected BioNano,s platform to enable comprehensive exploration of human ... for various organisms of interest, including those where no ... together to develop new methods for multiplexing on the ...
Breaking Biology Technology:CollabRx, Inc. Schedules First Quarter Fiscal Year 2015 Financial Conference Call and Business Update 2SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 2SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 3SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 4SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 5SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 6SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 7SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 8SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 9SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 10SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 11SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 12SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 13SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 14SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 15SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 16Smith & Nephew scores a HAT-TRICK with its entry into the high-growth hammer toe repair market 2Smith & Nephew scores a HAT-TRICK with its entry into the high-growth hammer toe repair market 3Smith & Nephew scores a HAT-TRICK with its entry into the high-growth hammer toe repair market 4BioNano Genomics Announces the Purchase of the Irys System by BGI 2BioNano Genomics Announces the Purchase of the Irys System by BGI 3BioNano Genomics Announces the Purchase of the Irys System by BGI 4
Cached News: