1991 Fiscal Year Final Research Report Summary
Relation between proteins in the bark and leaf tissues and the growth cycle of some fruit trees
| Project/Area Number |
02660024
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
園芸・造園学
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| Research Institution | Chiba University |
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Principal Investigator |
MATSUI Hiroyuki Department of Horticulture, Chiba University, Associate Professor, 園芸学部, 助教授 (90081546)
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| Co-Investigator(Kenkyū-buntansha) |
OHARA Hitoshi Department of Horticulture, Chiba University, Assistant, 園芸学部, 助手 (40160931)
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| Project Period (FY) |
1990 – 1991
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| Keywords | Fruit tree / Protein / Bark / Plant growth regulator |
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| Research Abstract |
The changing patters for total soluble proteins in the bark and leaf tissues differed among apple, Japanese pear, mume, grape and citrus. In apple and citrus, total soluble proteins were accumulated in the bark and leaf tissues during summer season. However apple leaves lost some proteins during senescence, and the increase of total soluble proteins in the bark continued. The protein contents in the bark and leaf tissues of citrus increased until late January. In next spring, the strage proteins were reutilized for developing flower buds and leaves of apple and citrus. Total protein contends in the bark and leaf tissues of grape and in leaf tissue of Japanese pear increased during shoot growing, but their decline began in early August. In contrast, total protein contends in the bark tissue of Japanese pear and in the bark and leaf tissues of mume scarcely changed throughout the year.
When various plant growth regulators were applied to the cut shoots of apple and Japanese pear, total protein contents in the bark decreased with applications of ABA, GA_<4+7> and NAA in apple and of ABA andKT-30 in Japanese pear.
The gibberellins identified in extracts from Japanese pear shoot by full-scan combined gas chromatography-mass spectrometry(GC-MS) were GA_9. GA_<19>. GA_<23>. GA_<24>. GA_<44>, GA_<53> and 3-epi-GA_4. GA_<19> and GA_<23> were major gibberellins in Japanese pear shoot. The levels of both gibberellins decreased from June to August. However, the levels of two gibberellins in the shoots of cultivar which flower-bud formation was inferior increased at the time of flower-bud differentiation.
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