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Wind-induced plant motion immediately increases cytosolic calcium
Citation
Knight, MR and Smith, SM and Trewavas, AJ, Wind-induced plant motion immediately increases cytosolic calcium, National Academy of Sciences of The United States of America. Proceedings, 89 pp. 4967-4971. ISSN 0027-8424 (1992) [Refereed Article]
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Official URL: http://www.pnas.org/content/89/11/4967.full.pdf
Abstract
Wind is one of the most unusual and more
dramatic of the environmental signals to modify plant development.
Wind-stimulated crops are also known to experience
considerable reductions in growth and subsequent yield. There
is at present no experimental data to suggest how wind signals
are perceived and transduced by plant cells. We have genetically
transformed Nicotiana plumbaginifolia to express aequorin
and thus produced luminous plants that directly report
cytosolic calcium by emitting blue light. With these plants we
have found wind stimulation to cause immediate increases in
cytosolic calcium and our evidence, based on the use of specific
inhibitors, suggests that this calcium is mobilized from organelle
sources. Our data further suggest that wind-induced
movement of tissues, by mechanically stimulating and stressing
constituent plant cells, is responsible for the immediate elevation
of cytosolic calcium; increases occur only when the plant
tissue is actually in motion. Repeated wind stimulation renders
the cells refractory to further calcium signaling but responsiveness
is rapidly recovered when stimulation is subsequently
diminished. Our data suggest that mechanoperception in plant
cells may possibly be transduced through intracellular calcium.
Since mechanoperception and transduction are considered
crucial to plant morphogenesis, our observations suggest that
calcium could be central in the control and generation of plant
form.
Item Details
Item Type: | Refereed Article |
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Keywords: | transgenic luminous plants, mechanoperception, recombinant aequorin, signal transduction |
Research Division: | Biological Sciences |
Research Group: | Plant biology |
Research Field: | Plant physiology |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the biological sciences |
UTAS Author: | Smith, SM (Professor Steven Smith) |
ID Code: | 101592 |
Year Published: | 1992 |
Deposited By: | Plant Science |
Deposited On: | 2015-06-26 |
Last Modified: | 2015-09-24 |
Downloads: | 0 |
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