Volatile‐mediated defense regulation occurs in maize leaves but not in maize roots

Doan, Cong van; Züst, Tobias; Maurer, Corina; Zhang, Xi; Machado, Ricardo A.R.; Mateo, Pierre; Ye, Meng; Schimmel, Bernardus C. J.; Glauser, Gaétan; Robert, Christelle A.M. (2020). Volatile‐mediated defense regulation occurs in maize leaves but not in maize roots (In Press). Plant, cell & environment Wiley 10.1111/pce.13919

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Plant leaves that are exposed to herbivore induced plant volatiles (HIPVs) respond by increasing their defenses, a phenomenon referred to as priming. Whether this phenomenon also occurs in the roots is unknown. Using maize plants, Zea mays, whose leaves respond strongly to leaf HIPVs, we measured the impact of belowground HIPVs, emanating from roots infested by the banded cucumber beetle, Diabrotica balteata, on constitutive and herbivore‐induced levels of defense‐related gene expression, phytohormones, volatile and non‐volatile primary and secondary metabolites, growth and herbivore resistance in roots of neighboring plants. HIPV exposure did not increase constitutive or induced levels of any of the measured root traits. Furthermore, HIPV exposure did not reduce the performance or survival of D. balteata on maize or its ancestor teosinte. Cross‐exposure experiments between HIPVs from roots and leaves revealed that maize roots, in contrast to maize leaves, neither emit nor respond strongly to defense‐regulating HIPVs. Together, these results demonstrate that volatile‐mediated defense regulation is restricted to the leaves of maize. This finding is in line with the lower diffusibility of volatiles in the soil and the availability of other, potentially more efficient information conduits below ground.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Biotic Interactions
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Doan, Van Cong; Züst, Tobias; Maurer, Corina; Zhang, Xi; Machado, Ricardo; Mateo, Pierre; Ye, Meng; Schimmel, Bernardus Cornelis J. and Robert, Christelle Aurélie Maud

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0140-7791

Publisher:

Wiley

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

17 Nov 2020 10:10

Last Modified:

17 Nov 2020 10:10

Publisher DOI:

10.1111/pce.13919

PubMed ID:

33073385

Uncontrolled Keywords:

Belowground plant‐herbivore interactions; maize; plant‐plant interactions; priming; volatiles; root defenses

BORIS DOI:

10.7892/boris.147384

URI:

https://boris.unibe.ch/id/eprint/147384

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