Costs of induced volatile production in maize

Hoballah, Maria E.; Kollner, TG; Degenhardt, J; Turlings, TCJ (2004). Costs of induced volatile production in maize. Oikos, 105(1), pp. 168-180. Blackwell 10.1111/j.0030-1299.2004.12831.x

[img] Text
Oikos_105_168.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (488kB) | Request a copy

Herbivore-induced plant volatiles have been shown to serve as indirect defence signals that attract natural enemies of herbivores. Parasitoids and predators exploit these plant-provided cues to locate their victims and several herbivores are repelled by the volatiles. Recently, benefits, in terms of plant fitness, from the action of the parasitoids were shown for a few systems. However, the cost of production of herbivore-induced volatiles for the plant remains unknown. Here, we estimate the fitness cost of the production of induced volatiles in maize, Zea mays. Plants were treated with regurgitant of Spodoptera littoralis or with the elicitor volicitin and we measured dry weight of plant parts at specific times after treatments. After a two-week treatment period, the dry-weight of leaves of induced plants was lower than that of un-induced plants, suggesting a metabolic cost for induced defence. However, maize plants seem to compensate for this loss during subsequent growth, since seed production at maturity was not different for unharmed plants and plants treated with caterpillar regurgitant. For volicitin treated plants a small but significant reduction in seed production was found. It is likely that the treatments also induced the production of other defence compounds, which will contribute to the cost. Yet, a comparison of six maize inbred lines with distinct differences in volatile emissions showed a strong correlation between the intensity of induced emissions and reduction in plant performance. An analysis of the terpenoids that accumulated in the leaves of the inbred lines revealed non-volatilised compounds are constitutively present in maize and only the volatilised compounds are induced. Interestingly, the lines that released the largest amounts of induced volatiles also contained more of the non-volatile terpenoids. Based on these results and results from a previous study on the benefits of attracting parasitoids, we conclude that costs of induced volatile production in plants are counterbalanced by the benefits as long as natural enemies of the herbivores are present in the environment.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Development
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Hoballah, Maria Elena

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0030-1299

Publisher:

Blackwell

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

05 Feb 2020 14:10

Last Modified:

05 Feb 2020 14:10

Publisher DOI:

10.1111/j.0030-1299.2004.12831.x

BORIS DOI:

10.7892/boris.135865

URI:

https://boris.unibe.ch/id/eprint/135865

Actions (login required)

Edit item Edit item
Provide Feedback