Jasmonate-dependent depletion of soluble sugars compromises plant resistance to Manduca sexta

Machado, Ricardo A. R.; Arce, Carla C. M.; Ferrieri, Abigail P.; Baldwin, Ian T.; Erb, Matthias (2015). Jasmonate-dependent depletion of soluble sugars compromises plant resistance to Manduca sexta. New Phytologist, 207(1), pp. 91-105. Wiley-Blackwell 10.1111/nph.13337

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Jasmonates regulate plant secondary metabolism and herbivore resistance. How they influence primary metabolites and how this may affect herbivore growth and performance are not well understood. We profiled sugars and starch of jasmonate biosynthesis-deficient and jasmonate-insensitive Nicotiana attenuata plants and manipulated leaf carbohydrates through genetic engineering and in vitro complementation to assess how jasmonate-dependent sugar accumulation affects the growth of Manduca sexta caterpillars. We found that jasmonates reduce the constitutive and herbivore-induced concentration of glucose and fructose in the leaves across different developmental stages. Diurnal, jasmonate-dependent inhibition of invertase activity was identified as a likely mechanism for this phenomenon. Contrary to our expectation, both in planta and in vitro approaches showed that the lower sugar concentrations led to increased M. sexta growth. As a consequence, jasmonate-dependent depletion of sugars rendered N. attenuata plants more susceptible to M. sexta attack. In conclusion, jasmonates are important regulators of leaf carbohydrate accumulation and this determines herbivore growth. Jasmonate-dependent resistance is reduced rather than enhanced through the suppression of glucose and fructose concentrations, which may contribute to the evolution of divergent resistance strategies of plants in nature.

Item Type:

Journal Article (Original Article)

Division/Institute:

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

UniBE Contributor:

Ruiz Machado, Ricardo Alberto; Marques Arce, Carla Cristina and Erb, Matthias

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0028-646X

Publisher:

Wiley-Blackwell

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

10 Jul 2015 14:11

Last Modified:

27 Feb 2018 09:44

Publisher DOI:

10.1111/nph.13337

Uncontrolled Keywords:

carbohydrates; insect nutrition; jasmonates; Manduca sexta; Nicotiana attenuata; primary metabolism

BORIS DOI:

10.7892/boris.70147

URI:

https://boris.unibe.ch/id/eprint/70147

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