Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Flower Chemicals Both Attract Friends and Deter Foes

23.11.2001



Images: Thomas Eisner/Cornell University; © Cornell University


Talk about multi-tasking. A new study reveals that in the St. John’s Wort plant, Hypericum calycinum, the same chemical not only attracts pollinating insects but also deters herbivores that pose a threat to its survival. The findings appear in the current issue of the Proceedings of the National Academy of Sciences.

To the human eye, the flowers of H. calycinum appear as uniform yellow disks (top image). Insects with ultraviolet-sensitive eyes, however, see a dark, ultraviolet-absorbing center (bottom image), which acts as a bull’s-eye to help the insects narrow in on the nectar. According to the new research, one class of pigments responsible for this UV pattern is dearomatized isoprenylated phloroglucinols, or DIPs. The investigators also found high concentrations of DIPs on the plant’s reproductive structures, which suggest that the chemicals serve additional purposes in the plant. "Just as important as attracting pollinators to a plant is producing a viable seed," team member Matthew Gronquist of Cornell University explains, "so there is an evolutionary incentive to protect the reproductive apparatus from herbivores."

Indeed, the scientists found that hypercalin A, one of the DIPs isolated from H. calycinum, deterred larvae of the rattlebox moth. Those caterpillars unlucky enough to ingest the hypercalin A died. The researchers conclude that DIPs act simultaneously to draw pollinators and discourage predators. "Now that we know where to look," study co-author Thomas Eisner remarks, "antifeedant chemicals like the DIPs undoubtedly will be found in other plant species, and they offer clues to more natural insect control agents."


Sarah Graham | Scientific American

More articles from Life Sciences:

nachricht Identifying the blind spots of soil biodiversity
04.08.2020 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig

nachricht AI & single-cell genomics
04.08.2020 | Helmholtz Zentrum München - German Research Center for Environmental Health

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: AI & single-cell genomics

New software predicts cell fate

Traditional single-cell sequencing methods help to reveal insights about cellular differences and functions - but they do this with static snapshots only...

Im Focus: TU Graz Researchers synthesize nanoparticles tailored for special applications

“Core-shell” clusters pave the way for new efficient nanomaterials that make catalysts, magnetic and laser sensors or measuring devices for detecting electromagnetic radiation more efficient.

Whether in innovative high-tech materials, more powerful computer chips, pharmaceuticals or in the field of renewable energies, nanoparticles – smallest...

Im Focus: Tailored light inspired by nature

An international research team with Prof. Cornelia Denz from the Institute of Applied Physics at the University of Münster develop for the first time light fields using caustics that do not change during propagation. With the new method, the physicists cleverly exploit light structures that can be seen in rainbows or when light is transmitted through drinking glasses.

Modern applications as high resolution microsopy or micro- or nanoscale material processing require customized laser beams that do not change during...

Im Focus: NYUAD astrophysicist investigates the possibility of life below the surface of Mars

  • A rover expected to explore below the surface of Mars in 2022 has the potential to provide more insights
  • The findings published in Scientific Reports, Springer Nature suggests the presence of traces of water on Mars, raising the question of the possibility of a life-supporting environment

Although no life has been detected on the Martian surface, a new study from astrophysicist and research scientist at the Center for Space Science at NYU Abu...

Im Focus: Manipulating non-magnetic atoms in a chromium halide enables tuning of magnetic properties

New approach creates synthetic layered magnets with unprecedented level of control over their magnetic properties

The magnetic properties of a chromium halide can be tuned by manipulating the non-magnetic atoms in the material, a team, led by Boston College researchers,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“Conference on Laser Polishing – LaP 2020”: The final touches for surfaces

23.07.2020 | Event News

Conference radar for cybersecurity

21.07.2020 | Event News

Contact Tracing Apps against COVID-19: German National Academy Leopoldina hosts international virtual panel discussion

07.07.2020 | Event News

 
Latest News

Identifying the blind spots of soil biodiversity

04.08.2020 | Life Sciences

Implantable transmitter provides wireless option for biomedical devices

04.08.2020 | Medical Engineering

Surface clean-up technology won't solve ocean plastic problem

04.08.2020 | Ecology, The Environment and Conservation

VideoLinks
Science & Research
Overview of more VideoLinks >>>