News tagged with insect herbivory
Novel electric signals in plants
Using ion-selective micro-electrodes electrical signals in plants moving from leaf to leaf could be measured. The speed of the signals spreading as voltage changes over cell membranes ranged from 5 to 10 cm ...
Mar 09, 2009 |
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Search results for insect herbivory
Deterring signals: Tobacco plants advertise their defensive readiness to attacking leafhoppers
Following herbivory, plants produce jasmonic acid, a hormone which activates several plant defense reactions. Scientists found that leafhoppers can evaluate whether tobacco plants are ready for defense when attacked. If jasmonate-signaling ...
May 23, 2012 |
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New bacteria toxins against resistant insect pests
Toxins from Bacillus thuringiensis bacteria (Bt toxins) are used in organic and conventional farming to manage pest insects. Sprayed as pesticides or produced in genetically modified plants, Bt toxins, us ...
Oct 19, 2011 |
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Insect gut microbe with a molecular iron reservoir
Microbes are omnipresent on earth. They are found as free-living microorganisms as well as in communities with other higher organisms. Thanks to modern biological techniques we are now able to address the ...
Sep 01, 2011 |
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Production of mustard oils: On the origin of an enzyme
(PhysOrg.com) -- In the evolutionary arms race, small changes can be sufficient to gain a crucial advantage over the enemy. Scientists at the Max Planck Institute for Chemical Ecology found out recently that ...
Mar 17, 2011 |
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Global warming may reroute evolution
(PhysOrg.com) -- Rising carbon dioxide levels associated with global warming may affect interactions between plants and the insects that eat them, altering the course of plant evolution, research at the University ...
Feb 16, 2011 |
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Putting the dead to work for conservation biology
scientists who use the fossil record to understand the evolutionary and ecological responses of present-day species to changes in their environment – are putting the dead to work.
Jan 19, 2011 |
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Putting the dead to work
Conservation paleobiologists -- scientists who use the fossil record to understand the evolutionary and ecological responses of present-day species to changes in their environment -- are putting the dead to ...
Jan 14, 2011 |
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Ancient insects preferred warmer climates
For millions of years, insects and plants have coevolved—leaf-eaters adapting to the modifications of their hosts and plants changing to protect themselves from herbivory. The abundance and diversity of both insects ...
Nov 23, 2010 |
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Plant-derived scavengers prowl the body for nerve toxins
The brain is forever chattering to itself, via electrical impulses sent along its hard-wired neuronal "Ethernet." These e-messages are translated into chemical transmissions, allowing communication across ...
Nov 23, 2010 |
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Red light regulates nectar secretion
Flowering plants produce nectar to attract insect pollinators. Some plant species, such as Lima bean, also secrete nectar from so-called extrafloral nectaries to attract ants which in turn fend off herbivores. ...
Sep 27, 2010 |
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List of search results for insect herbivory
