HOME >> BIOLOGY >> NEWS
Plants tag insect herbivores with an alarm

e U.S. Department of Agriculture's Agricultural Research Service in Gainesville, Florida, led a research team that spent three years systematically analyzing the biochemical response of cowpea (Vigna unguiculata), a legume, to herbivory and oral secretions of fall armyworm (Spodoptera frugiperda), a general crop pest. During the extensive project, the researchers conducted over 10,000 leaf bioassays, testing for plant phytohormone production after exposure to successively fractionated insect oral secretions, among other experiments. Painstakingly collected just a few microliters at a time, the team tested approximately one full liter of caterpillar secretions.

As previously reported, the scientists identified and isolated an 11 amino acid peptide, inceptin, that plays a pivotal warning role in cowpea plants being attacked by the fall armyworm. Inceptin is part of a larger, essential enzyme, chloroplastic ATP synthase, in plants. When the fall armyworm feeds on cowpea, the insect ingests ATP synthase and breaks it down, releasing inceptin, which then becomes part of the armyworm's oral secretions. When the worm next feeds on cowpea, trace amounts of inceptin recontact the wounded leaf and alerts plants to generate a burst of defensive phytohormones.

In the June issue of Plant Physiology, Schmelz and his USDA collaborators, including Sherry LeClere, Mark Carroll, Hans Alborn, and Peter Teal, take the analysis further. They confirm inceptin's role as the dominant (and most stable) peptide in the cowpea's defense to fall armyworm. In addition, the researchers identify two related but less abundant peptide fragments (Vu-GE+In and Vu-E+In) that provoke similar defense responses in cowpea and a third (Vu-In-A) with no apparent effect. They also show that inceptin-related peptides spark a consistent, sequential cascade of phytohormone increases in cowpea, beginning with jasmonic acid, followed by ethylene and, lastly, salicyclic acid. Finally, the rese
'"/>

Contact: Dr. Eric Schmelz
Eric.Schmelz@ARS.USDA.GOV
352-374-5858
American Society of Plant Biologists
9-May-2007


Page: 1 2 3

Related biology news :

1. Plants recognize their siblings, biologists discover
2. Plants that produce more vitamin C may result from UCLA-Dartmouth discovery
3. Plants with male and bisexual flowers on the same plant are better mothers
4. Plants do not emit methane
5. Plants management of nutrient suggests environmental remedies
6. Plants point the way to coping with climate change
7. Plants, plasmids and possibilities -- Methods permit functional gene studies in plants
8. Plants give up answers in the war on bacteria
9. Plants tell caterpillars when its safe to forage
10. Plants role in global warming re-examined in ORNL Science paper
11. Hold your breath; Plants may absorb less carbon dioxide than we thought

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/8/2017)... Inc. (NASDAQ: AWRE ), a leading supplier of ... quarter and year ended December 31, 2016. ... compared to $6.9 million in the same quarter last year. ... million compared to $2.6 million in the fourth quarter of ... $0.5 million, or $0.02 per diluted share, which compares to ...
(Date:2/8/2017)... 7, 2017 The biometrics market has ... confluence of organizations, desires to better authenticate or ... (password and challenge questions), biometrics is quickly working ... The market is driven by use cases, though ... and enterprise uses cases, with consumer-facing use cases ...
(Date:2/7/2017)... --  MedNet Solutions , an innovative SaaS-based eClinical technology ... is pleased to announce that the latest release of ... and award winning eClinical solution, is now available for ... a proven Software-as-a-Service (SaaS) clinical research technology platform that ... delivers an entire suite of eClinical tools to support ...
Breaking Biology News(10 mins):
(Date:3/22/2017)... ... March 21, 2017 , ... Watson-Marlow ... pump with patented ReNu single-use (SU) cartridge technology. Engineered by the world ... pumps in SU tangential flow filtration (TFF), virus filtration (VF) and high-performance ...
(Date:3/22/2017)... ... March 22, 2017 , ... The Society for Immunotherapy ... as outlined in the Administration’s recently published fiscal year 2018 budget request. , ... of Health (NIH) by $5.8 billion or roughly 20% of its total budget. If ...
(Date:3/22/2017)... and PETACH TIKVAH, Israel , ... BCLI), a leading developer of adult stem cell technologies ... , Chief Executive Officer, will provide an update on ... 2 nd Annual Neuroscience Biopartnering and Investment Forum, ... New York Academy of Sciences. ...
(Date:3/22/2017)... , March 22, 2017  RXi Pharmaceuticals ... innovative therapeutics that address significant unmet medical needs, ... Chief Business Officer, will present at the 5th ... will provide a platform to present to and ... leading pharmaceutical and biotech companies as well as ...
Breaking Biology Technology:
Cached News: