Ultraviolet (UV-B) light increases defense ability of plants against herbivores

[著者] Dinh ST, Galis I and Baldwin IT

[論文タイトル] UVB radiation and 17-hydroxygeranyllinalool diterpene glycosides provide durable resistance against mirid (Tupiocoris notatus) attack in field-grown Nicotiana attenuata plants

[掲載論文] Plant Cell and Environment 36: 590-606 (2013)DOI: 10.1111/j.1365-3040.2012.02598.x


In nature, plants accumulate various ultraviolet (UV) light absorbing compounds to protect themselves from UV exposure, as it can cause serious damage to nucleic acids and other components in unprotected cells. By investigating the responses of tobacco plants growing in the presence and absence of UV-B in the field, we found that UV absorbing phenolic compounds acquired additional role in protecting plants against herbivores, such as cell-sucking mirid bugs. It shows that UV-B, although dangerous for plants, can also have some beneficial effects that lead to better protection from herbivores in nature. In addition to phenolic compounds, another class of well-known defense compounds, diterpene glycosides accumulated differentially under UV-B and non-UV-B conditions.(文責 Group of Plant-Insect Interactions・Ivan Galis)

Photo: Tobacco (Nicotiana attenuata) plants growing under UV-B filters during experiments in Great Basin Desert, Utah, USA.

Experiments presented in this paper were conducted under direct support of Max-Planck Institute for Chemical Ecology in Jena, Germany (previous workplace of I. Galis, Jan 2007~Mar 2011).

関連リンク: Group of Plant-Insect Interactions