Negative Phototropism of the Creeping Shoots in Japanese Ivy, Hedera rhombea.
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- Kato Shogo
- Faculty of Applied Biological Sciences, Gifu University
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- Hosoi Kazuya
- Faculty of Agriculture, Gifu University Ichijo Co., Ltd.
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- Kawakubo Nobumitsu
- Faculty of Applied Biological Sciences, Gifu University
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- Komiyama Akira
- Faculty of Applied Biological Sciences, Gifu University
Bibliographic Information
- Other Title
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- 負の光屈性によるキヅタ匍匐シュートの伸長
- フ ノ ヒカリ クッセイ ニ ヨル キズタ ホフク シュート ノ シンチョウ
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Description
We analyzed the relationships between the growth direction of creeping shoot in Japanese ivy (Hedera rhombea) and the light conditions experimentally. As a result, the creeping shoots (≥ 10 mm in length) of the ivy clearly showed negative phototropism clearly. The negative phototropism led the shoot horizontally and vertically into the dark space strictly along the negative gradient of spatial light intensity. The growth rate of the shoot decreased according to the reduction of light intensity, but negative phototropism still occurred under the weaker light conditions (20 μmol m2 s1). Therefore, negative phototropism in the creeping shoots of this species must be understood as the active response of searching for a dark space instead of the response of avoiding a strong light. When a creeping shoot searches for an effective tree as a climbing support under heterogeneous light conditions such as forest floors, this negative phototropism would provide an ecological function to lead a shoot apex to the most shady tree base which can be a climbing start point.
Journal
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- Journal of the Japanese Forest Society
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Journal of the Japanese Forest Society 93 (3), 123-128, 2011
The Japanese Forest Society
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Details 詳細情報について
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- CRID
- 1390282680204330496
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- NII Article ID
- 130000999453
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- NII Book ID
- AA12003078
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- ISSN
- 1882398X
- 13498509
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- NDL BIB ID
- 11180388
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL Search
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed