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Floral damage induces resistance to florivory in Impatiens capensis

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Arthropod-Plant Interactions : Volume 10, Issue 1, February 2016

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Floral damage induces resistance to florivory in Impatiens capensis

Content Provider	Springer Nature Link
Author	Boyer, Matthew David Hank Soper Gorden, Nicole L. Barber, Nicholas A. Adler, Lynn S.
Copyright Year	2016
Abstract	Many plants produce defense chemicals that are induced in response to damage. In spite of the tight links between floral tissue and plant reproduction, very little is known about whether floral defenses are induced in response to floral damage. We manipulated Impatiens capensis flowers to determine whether floral damage reduces subsequent florivory, whether it induces anthocyanins or condensed tannins in floral tissues, and whether responses are localized or systemic. We damaged one flower per plant at one of three damage levels (0, 30, or 60 % tissue removal), collected subsequent flowers at set time intervals and branch locations, and measured whole-plant florivory for 3 weeks following damage. We also observed a flower color polymorphism and analyzed responses separately for red- and yellow-flowered plants. Moderate damage to a single flower reduced subsequent whole-plant florivory, but heavy damage did not. Moderate damage to a focal flower also increased anthocyanins in subsequent flowers on the same branch of red-flowered plants, but decreased anthocyanins on parallel-branch flowers of yellow-flowered plants. Damage did not affect floral tannins. Because the reduction in florivory was systemic and induced anthocyanins were not consistently induced systemically, there may be other secondary compounds not measured in this study that were systemically induced, or effects of visual or olfactory cues of damage itself that reduced subsequent florivory. This is the first study demonstrating that damage to a single flower can reduce subsequent whole-plant florivory in the field, indicating that initial damage can have cascading effects on subsequent interactions.
Starting Page	121
Ending Page	131
Page Count	11
File Format	PDF
ISSN	18728855
Journal	Arthropod-Plant Interactions
Volume Number	10
Issue Number	2
e-ISSN	18728847
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-03-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Anthocyanins Condensed tannins Florivory Induced defense Optimal defense theory Plant defense Entomology Invertebrates Plant Sciences Ecology Behavioral Sciences Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics Insect Science Agronomy and Crop Science

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Floral damage induces resistance to florivory in Impatiens capensis

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Floral damage induces resistance to florivory in Impatiens capensis

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Floral damage induces resistance to florivory in Impatiens capensis

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Floral damage induces resistance to florivory in Impatiens capensis