2016 Fiscal Year Final Research Report
Function of boron in plant cell walls
| Project/Area Number |
26450078
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Plant nutrition/Soil science
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 植物 / ホウ素 / 細胞壁 / ストレス / ペクチン / 細胞死 |
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| Outline of Final Research Achievements |
Boron as an essential micronutrient for vascular plants occurs in cell walls, and cross-links pectin to form a gel. To get insights on physiological function of this gel in cell walls, we analyzed the phenotype of Arabidopsis mutant that was considered to be inhibited in biosynthesis of pectic RG-II, which is the site of borate-crosslinking. The mutant showed decreased cell division and elogation probably due to retarded formation of cell wall, but the mutant cell wall contained RG-II at a similar level to wild type, suggesting that defective cell wall without RG-II could never be formed. In addition, when RG-II was not properly cross-linked with B under B deficient condition, an cell death similar to hypersensitive cell death occurred immediately in the root elongation zone. These findings together demonstrate the physiological importance of boron-RG-II cross-linking.
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| Free Research Field |
植物栄養学
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