Compensation for lignin deficiency in tobacco plants occurs in nature

[著者] Kaur, H., Shaker, K., Heinzel, N., Ralph, J., Galis, I., Baldwin I.T.

[論文タイトル] Environmental stresses of field growth allow cinnamyl alcohol dehydrogenase-deficient Nicotiana attenuata plants to compensate for their structural deficiencies.

[掲載論文] Plant Physiology 159: 1545–1570 (2012)
doi:10.1104/pp.112.196717

[内容紹介]
We have constructed plants deficient in lignification by silencing two essential cinnamyl alcohol dehydrogenase genes (CAD) genes in wild tobacco Nicotiana attenuata. While these plants were not able to withstand their own gravity in the glasshouse, they performed normally under harsh natural conditions in field experiments conducted in the Great Basin Desert in the USA (Utah). We show that a number of compensatory responses occurred under natural stress that allowed plants to compensate for their ectopically reduced lignin production. These factors included enhanced UV-B radiation, wind, drought and high light fluency in the native habitat of N. attenuata plants.

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 ~March 2011).
(文責 Group of Plant-Insect Interactions・Ivan Galis)

関連リンク: Group of Plant-Insect Interactions