Mechanical defenses of plant extrafloral nectaries against herbivory

Autor:	Moshe Gish, Mark C. Mescher, Consuelo M. De Moraes
Jazyk:	angličtina
Rok vydání:	2016
Předmět:	calcium oxalate herbivory mechanical defense phytoliths plant defense quantitative defenses rigidity stiffness symbiosis toughness Biology (General) QH301-705.5
Zdroj:	Communicative & Integrative Biology, Vol 9, Iss 3 (2016)
Druh dokumentu:	article
ISSN:	1942-0889 19420889
DOI:	10.1080/19420889.2016.1178431
Popis:	Extrafloral nectaries play an important role in plant defense against herbivores by providing nectar rewards that attract ants and other carnivorous insects. However, extrafloral nectaries can themselves be targets of herbivory, in addition to being exploited by nectar-robbing insects that do not provide defensive services. We recently found that the extrafloral nectaries of Vicia faba plants, as well as immediately adjacent tissues, exhibit high concentrations of chemical toxins, apparently as a defense against herbivory. Here we report that the nectary tissues of this plant also exhibit high levels of structural stiffness compared to surrounding tissues, likely due to cell wall lignification and the concentration of calcium oxalate crystals in nectary tissues, which may provide an additional deterrent to herbivore feeding on nectary tissues.
Databáze:	Directory of Open Access Journals
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