2016 Fiscal Year Final Research Report
Morphological and physiological studies on densely branched lateral roots triggered by soil phosphate
| Project/Area Number |
26850008
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Crop production science
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| Research Institution | Osaka Prefecture 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 | リン酸獲得 / 低リン応答反応 / 根系構造 / セスバニア / 土壌微生物 |
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| Outline of Final Research Achievements |
Densely branched lateral roots (DBLRs) in Sesbania cannabina are formed in response to patchily distributed phosphorus (P). DBLR formation is one of the P-acquisition strategies of S. cannabina. DBLRs were produced with secondary to quaternary lateral roots after primary roots passed near P fertilizer. Pi content per DBLR increased as DBLRs develop, resulting in higher shoot growth. Under P-deficient conditions, the activity of PEPC and APase increased in non-DBLR roots, but these activities were significantly lower in DBLRs in the same plants. AMF inoculation changed the root system architecture by significantly decreasing the numbers of DBLRs and AMF colonization was lower in DBLR formation compared to normal roots. Our results indicate that DBLR formation is one of the P-coacquisition strategies of S. cannabina. The traits of roots that form DBLR are clearly different in morphological, biochemical response and AMF symbiosis from non-DBLR roots.
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| Free Research Field |
作物学
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