| Project/Area Number |
21380017
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Crop science/Weed science
|
|---|
| Research Institution | National Agriculture and Food Research Organization |
|---|
Principal Investigator |
WADA Hiroshi 独立行政法人農業・食品産業技術総合研究機構, 九州沖縄農業研究センター水田作・園芸研究領域, 主任研究員 (40533146)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
MORITA Satoshi 独立行政法人農業・食品産業技術総合研究機構, 九州沖縄農業研究センター・水田作・園芸研究領域, 上席研究員 (40391453)
|
|---|
| Project Period (FY) |
2009 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥19,890,000 (Direct Cost: ¥15,300,000、Indirect Cost: ¥4,590,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2010: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2009: ¥15,730,000 (Direct Cost: ¥12,100,000、Indirect Cost: ¥3,630,000)
|
|---|
| Keywords | 食用作物 / 作物学 / 環境ストレス / 細胞生理 / 糖代謝 |
|---|
| Research Abstract |
Foehn-induced dry wind during grain filling typically increased ring-shaped chalky kernels in rice(Oryza sativa L.) plants. The objective of this study was to physiologically investigate mechanisms of the occurrence of ring-shaped chalkiness in the growing endosperm cells by utilizing the improved cell pressure probe. The inner endosperm cells, where the highest frequency of ring-shaped chalkiness was observed, maintained turgor by osmotic adjustment spatially even at low water potentials prior to the chalky formation. The results also indicated that neither the final grain weight nor^<13> C distribution in both panicles and the kernels was declined. Therefore, it was concluded that turgor maintenance by osmotic adjustment contributes to grain development under water deficit by foehn, and osmotic adjustment has a role in temporally inhibiting starch accumulation in endosperms, resulting in ring-shaped chalky kernels under foehn-induced water deficit conditions.
|
