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Plant and Cell Physiology Advance Access first published online on April 17, 2006
This version published online on April 18, 2006
Plant and Cell Physiology, doi:10.1093/pcp/pcj048
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Plant and Cell Physiology 2006 © The Japanese Society of Plant Physiologists (JSPP); all rights reserved.
Received March 23, 2006
Accepted April 5, 2006

Regular Paper

The Fern Adiantum capillus-veneris Lacks Stomatal Responses to Blue Light

Michio Doi 1, Masamitsu Wada 2, and Ken-ichiro Shimazaki 3 *

1 Research and Development Center for Higher Education, Kyushu University, Ropponmatsu, Fukuoka, 810-8560, Japan
2 National Institute for Basic Biology, Nishigonaka 38, Myodaiji Okazaki, 444-8585, Japan
3 Department of Biology, Faculty of Science, Kyushu University, Ropponmatsu, Fukuoka, 810-8560, Japan

* To whom correspondence should be addressed.
Ken-ichiro Shimazaki, E-mail: kenrcb{at}mbox.nc.kyushu-u.ac.jp


  Abstract

We investigated the responses of stomata to light in the fern Adiantum capillus-veneris, a typical species of Leptosporangiopsida. Stomata in the intact leaves of the sporophytes opened in response to red light, but they did not open when blue light was superimposed on the red light. The results were confirmed in the isolated Adiantum epidermis. The red light-induced stomatal response was not affected by the mutation of phy3, a chimeric protein of phytochrome and phototropin in this fern. The lack of a blue light-specific stomatal response was observed in three other fern species of Leptosporangiopsida, i.e., Pteris cretica, Asplenium scolopendrium, and Nephrolepis auriculata. Fusicoccin, an activator of the plasma membrane H+-ATPase, induced both stomatal opening and H+ release in the Adiantum epidermis. Adiantum phototropin genes AcPHOT1 and AcPHOT2 were expressed in the fern guard cells. The transformation of an Arabidopsis phot1 phot2 double mutant, which lost blue light-specific stomatal opening, with AcPHOT1 restored the stomatal response to blue light. Taken together, these results suggest that ferns of Leptosporangiopsida lack a blue light-specific stomatal response, although the functional phototropin and plasma membrane H+-ATPase are present in this species.

Keywords: Adiantum capillus-veneris; blue light response; fern; phototropin; stomata.
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M. Doi and K.-i. Shimazaki
The Stomata of the Fern Adiantum capillus-veneris Do Not Respond to CO2 in the Dark and Open by Photosynthesis in Guard Cells
Plant Physiology, June 1, 2008; 147(2): 922 - 930.
[Abstract] [Full Text] [PDF]


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