| Project/Area Number |
12660237
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
生物環境
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| Research Institution | Kyushu University |
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Principal Investigator |
YOSHIDA Satoshi Biotron Institute, Asc. Prof., 生物環境調節センター, 助教授 (90191585)
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| Project Period (FY) |
2000 – 2002
|
| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2002: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2001: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2000: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | plug-grown seedling / plug tray / root restriction / overgrown seedling / image analysis / root structure / 移植後の生育 / 分岐 / 伸長 / 老化 |
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| Research Abstract |
Plug-grown seedlings in a plug tray can be easily overgrown, because of the tightly-restricted root zone. Depression of root activity was found in overgrown cabbage seedlings by evaluation of respiration and bleeding sap rate of the root system. For analysis of root growth in plug-grown seedlings just after transplanting, cabbage seedlings were transplanted in pots filled with sand and grown for two weeks under controlled environment in a phytotron glass room. Subsequent growth of new roots sticked out of a root clump was examined by image analysis of the root system dug out from sand. The delay of transplanting depressed elongation and development of vigorous anchoring roots after transplanting, although volume of new roots was supplemented with a rapid increase in fine roots by branching frequently. Thus, the seedlings overgrown in a plug tray could not become deeply-rooted plants after transplanting, and they might be intolerant of drastic changes in root environment. Coating the tray with a copper compound for preventing formation of a root clump improved subsequent root growth of overgrown seedlings to some extent. Such a new methodology may help to make a plug technique applicable to wide regions in the world for agricultural plant production.
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