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:8/28/2014)... Society of America (ESA) is pleased to announce the ... of the Society. Honorary Membership acknowledges those who have ... involvement in the affairs of the Society that has ... selected by the ESA Governing Board and then voted ... honored at the Awards Ceremony at Entomology 2014, ESA,s ...
(Date:8/28/2014)... is available in German . ... owes its name to a striking pattern of blue stripes ... cells, reflective silvery cells, and yellow cells emerge during growth ... as a multilayered mosaic to compose the characteristic colour pattern. ... types have to interact to form proper stripes, the embryonic ...
(Date:8/28/2014)... A Mayo Clinic researcher and his collaborators have ... and enhance the process of re-engineering cells for biomedical ... network biology methods to aid stem cell engineering. Details ... are described in two back-to-back papers in the journal ... broad range of uses for all types of cell-based ...
Breaking Biology News(10 mins):Fred Baxendale selected as Honorary Member of the Entomological Society of America 2How the zebrafish gets its stripes 2How the zebrafish gets its stripes 3New tool aids stem cell engineering for medical research 2
(Date:8/29/2014)... SAN DIEGO, Aug. 29, 2014  Pfenex Inc. ... in the development of high-value and difficult to ... business update and reported financial results for the ... "With the successful completion of our initial public ... advance our biosimilar product candidates, derived from our ...
(Date:8/29/2014)... are based on electrons, but one of the most ... i.e. circuits based on light (photons) instead of electrons. ... a stream of single photons and control their direction. ... attempts to achieve this control, but now scientists at ... steady stream of photons emitted one at a time ...
(Date:8/29/2014)... (PRWEB) August 29, 2014 The ... $5.6 billion in 2019. It is expected to ... to 2019, and was valued at $1.8 billion ... by Transparency Market Research. , For more information ... http://www.transparencymarketresearch.com/companion-diagnostics-market.html . , The research report, titled “Companion ...
(Date:8/29/2014)... 29, 2014 According to a new market ... global orthobiologics market was valued at USD 3,754.6 million in ... 5,519.9million in 2019at a CAGR of 5.9% from 2013 to ... and above is afflicted by bone and joint disorders, and ... 2020. This has and will continue to increase the demand ...
Breaking Biology Technology:Pfenex Reports Second Quarter 2014 Results and Provides Business Update 2Pfenex Reports Second Quarter 2014 Results and Provides Business Update 3Pfenex Reports Second Quarter 2014 Results and Provides Business Update 4Pfenex Reports Second Quarter 2014 Results and Provides Business Update 5Pfenex Reports Second Quarter 2014 Results and Provides Business Update 6Pfenex Reports Second Quarter 2014 Results and Provides Business Update 7Pfenex Reports Second Quarter 2014 Results and Provides Business Update 8Breakthrough in light sources for new quantum technology 2Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 2Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 3Global Orthobiologics Market to Reach $5,519.9 Million by 2019: Transparency Market Research 2Global Orthobiologics Market to Reach $5,519.9 Million by 2019: Transparency Market Research 3
Cached News: