Poplar Extrafloral Nectaries: Two Types, Two Strategies of Indirect Defenses Against Herbivores

Overview

Journal Plant Physiol

Specialty Physiology

Date 2012 May 11

PMID 22573802

Citations 15

Authors

Maria Escalante-Perez

Mario Jaborsky

Silke Lautner

Jorg Fromm

Tobias Muller

Marcus Dittrich

Maritta Kunert

Wilhelm Boland

Rainer Hedrich

Peter Ache

Affiliations

Soon will be listed here.

Abstract

Many plant species grow extrafloral nectaries and produce nectar to attract carnivore arthropods as defenders against herbivores. Two nectary types that evolved with Populus trichocarpa (Ptr) and Populus tremula × Populus tremuloides (Ptt) were studied from their ecology down to the genes and molecules. Both nectary types strongly differ in morphology, nectar composition and mode of secretion, and defense strategy. In Ptt, nectaries represent constitutive organs with continuous merocrine nectar flow, nectary appearance, nectar production, and flow. In contrast, Ptr nectaries were found to be holocrine and inducible. Neither mechanical wounding nor the application of jasmonic acid, but infestation by sucking insects, induced Ptr nectar secretion. Thus, nectaries of Ptr and Ptt seem to answer the same threat by the use of different mechanisms.

Citing Articles

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