2007 Fiscal Year Final Research Report Summary
Identification of key factor fur cell wall disassembly in fruit by proteome analysis and transgenic technology
| Project/Area Number |
17380024
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Horticulture/Landscape architecture
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| Research Institution | Okayama University |
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Principal Investigator |
KUBO Yasutaka Okayama University, Graduate school of natural science, Professor (80167387)
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| Co-Investigator(Kenkyū-buntansha) |
NAKANO Ryohei Okayama University, Graduate school of natural science, Associate Professor (70294444)
EZURA Hiroshi University of Tsukuba, Graduate school of life and environmental science, Professor (00332552)
USHIJIMA Khoichiro Okayama University, Graduate school of natural science, Assistant Professor (20379720)
INABA Akitsugu Okayama University, Emeritus Professor (90046491)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Cell wall protein / Fruit softening / YSST / 2-D gel electophoreisis / Pear / Melon / Chinese pear |
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| Research Abstract |
Cell wall is main factor for physical structure of plant and the main limiting factors limiting their storage, transport and marketability. Previous studies indicated importance of plant hormone ethylene for fruit ripening and softening. However, key factor (s) in cell wall disassembly have not been identified. 'La France' European pear fruit and melon fruit undergo dramatic softening during ripening in an ethylene-dependent manner, whereas Chinese pear does not exhibit softening in spite of its massive ethylene production during ripening. To broad-scale and comprehensive screening for factors involved in fruit softening, in addition to gene expression analysis of polygalacturonase, α-arabinofuranosidase and β-galactosidase, the two-dimensional gel electrophoresis profiles and YSST analysis of cell wall proteins were employed. The accumulation levels of 200 protein spots were isolated in the ripening 'La France' pear. When softening pears of this variety were treated with 1-MCP, a strong ethylene inhibitor, fruit softening was retarded. On the comparison between treated and non-treated fruit, 3 protein spots were selected as candidates for key factors of fruit softening, since their accumulation showed specific pattern for softening.
On YSST analysis, 170 clones (70 contigs and 100 singletons) encoding secreted proteins including clones which have not been previously reported were isolated. Based on the macroarray analysis, 28 clones showed elevated or down-regulated expression with pear fruit development and ripening. On comparison in 'La France' and the non-softening 'Yali' pear fruit, 11 potential new cell wall modifying proteins among 28 clones were selected for candidates for key factor of fruit softening.
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[Journal Article] β-Galactosidase and α-L-arabinofuranosidase activities and gene expression in European and Chinese pear fruit during ripening2007
Author(s)
Mwaniki, M., W., F., M., Mathookob, M., Matsuzakia, K., Hiwasac, Tateishi, K., Ushijimae, R., Nakanoe, A., Inabae, Y., Kubo
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Journal Title
J.Japan.Soc.Hort.Sci 58
Pages: 1281-1290
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Expression characteristics of seven members of the E-galactosidase gene family in 'La France' pear (Pyrus communis L.) fruit during growth and their regulation by 1-methylcyclopropene during postharvest ripening2005
Author(s)
Mwaniki, M., W., F., M., Mathookob, M., Matsuzakia, K., Hiwasac, A., Tateishi, K., Ushijimae, R., Nakanoe, A., Inabae, Y., Kubo
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Journal Title
Postharvest Biol. Technol 35
Pages: 253-261
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Expression analysis of cell wall related genes during fruit ripening in European pear fruit2007
Author(s)
Mwaniki, M., W., R., Nakano, K., Ushijima. K., Aoki, J., K., C., Rose, Y., Kubo
Organizer
Ann.Meet.JSHS
Place of Presentation
Tokyo University of Agricultu
Year and Date
20070328-29
Description
「研究成果報告書概要(欧文)」より
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[Presentation] YSST screening for cloning of cDNA encoding secreted proteins from European pear fruit2006
Author(s)
Mwaniki, M., W., T., K., Ushijima. H., Yamane, J., KC. Rose, A.Inaba, Y., Kubo
Organizer
Ann.Meet.JSHS
Place of Presentation
Tiba University
Year and Date
20060329-30
Description
「研究成果報告書概要(欧文)」より
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