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| Content Provider | Springer Nature Link |
|---|---|
| Author | Zhang, Sh. Chen, S. Chen, F. Jiang, B. |
| Copyright Year | 2011 |
| Abstract | The stem of the creeping Chrysanthemum morifolium Ramat. cultivar ‘Yuhuajinhua’ responds to a gravitational stimulus by bending. Most of the calcium ion (Ca$^{2+}$) present in the stem cells was concentrated in the cell walls, intercellular space, and vacuoles, with very little in the cytoplasm. An investigation of the effects of supplying exogenous Ca$^{2+}$ or the Ca$^{2+}$ chelator EGTA on the creeping habit and the level of endogenous IAA showed that, for at least 60 min after gravistimulation was initiated, the level of Ca$^{2+}$ present in the epidermis cell walls on the lower side of the stem was maintained at a higher level than in those on the upper side. In the endodermis cells, most of the Ca$^{2+}$ was located in the intercellular space, cell walls, and throughout the vacuole, with only little within the cytoplasm. Endodermis cell Ca$^{2+}$ responded rapidly (within 5 min) to gravistimulation. The level of Ca$^{2+}$ continued to increase within the cytoplasm for at least 30 min into the period of gravistimulation. Exogenously applied calcium chloride (CaCl$_{2}$) accentuated gravity-induced bending and the IAA concentration differed between the upper and the lower sides of the gravistimulated bent stem, whereas EGTA decreased these effects. Ca$^{2+}$ appears to play an important role in the gravitropism of the ‘Yuhuajinhua’ creeping stem, not only by changing its distribution in the epidermis cell walls and the endodermis cytoplasm, but also by regulating IAA difference between the upper and lower sides of the creeping stem. |
| Starting Page | 696 |
| Ending Page | 702 |
| Page Count | 7 |
| File Format | |
| ISSN | 10214437 |
| Journal | Russian Journal of Plant Physiology |
| Volume Number | 58 |
| Issue Number | 4 |
| e-ISSN | 16083407 |
| Language | English |
| Publisher | SP MAIK Nauka/Interperiodica |
| Publisher Date | 2011-06-19 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Chrysanthemum morifolium calcium gravitropism indole-3-acetic acid subcellular localization Plant Physiology Plant Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science |
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