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Ion flux kinetics in blue light-grown field dodder (Cuscuta campestris) seedlings
Citation
Haidar, M and Shabala, S, Ion flux kinetics in blue light-grown field dodder (Cuscuta campestris) seedlings, Weed Biology and Management, 15, (4) pp. 159-164. ISSN 1444-6162 (2015) [Refereed Article]
Copyright Statement
Copyright 2015 Weed Science Society of Japan
Abstract
Previous studies have revealed that blue light stimulates coiling and prehaustoria development in young de-etiolated dodder seedlings prior to host attachment. In this study, the Ca2+ and H+ flux kinetics that are associated with blue light-mediated coiling and prehaustoria development in de-etiolated dodder seedlings were measured uninvasively using the ion-selective, vibrating microelectrode ion flux system. The findings showed that blue light induces rapid transient changes in the net Ca2+ and H+ fluxes. A clearly pronounced lag of about several minutes was observed between the blue light-induced changes in the Ca2+ and H+ fluxes, with H+ being a leading ion. The addition of 1 mol L−1 vanadate, a known blocker of the plasma-membrane H+-ATPase, to the bathing solution completely prevented both the H+ and the Ca2+ flux responses and inhibited coiling and prehaustoria development, suggesting a causal relationship between the blue light-induced changes in the net Ca2+ and H+ fluxes and seedling movements. It is concluded that the plasma-membrane H+-ATPase plays a key role in a dodder's parasitic mode of growth and its adaptive response to the environment.
Item Details
Item Type: | Refereed Article |
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Keywords: | weed, light, signalling, blue light, dodder, H+-ATPase, ion fluxes |
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: | Shabala, S (Professor Sergey Shabala) |
ID Code: | 105130 |
Year Published: | 2015 |
Deposited By: | Tasmanian Institute of Agriculture |
Deposited On: | 2015-12-09 |
Last Modified: | 2017-11-06 |
Downloads: | 0 |
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