The response of the stable oxygen isotope composition in desert plants to salt stress
Project/Area Number |
26450192
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Forest science
|
Research Institution | Mie University |
Principal Investigator |
MATSUO NAOKO 三重大学, 生物資源学研究科, 講師 (00423012)
|
Project Period (FY) |
2014-04-01 – 2017-03-31
|
Project Status |
Completed (Fiscal Year 2016)
|
Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
|
Keywords | 乾燥地植物 / 安定同位体比 / 塩回避 / 不定根 / 葉による露吸収 / 水利用効率 / 蒸散速度 / 吸水源 / 葉による吸水 / 水の再分配 / 水輸送 / 塩の回避 / 葉内水 / 葉有機物 / 酸素安定同位体比 / 塩ストレス / 葉の露吸収 / 匍匐枝 / 主根と不定根の機能 |
Outline of Final Research Achievements |
The salt tolerance of desert plants was assessed by using the stable isotope ratios to restore/conserve the arid ecosystems degraded by the salinization. We conducted the experiments that the 18O-labeled water was supplied to roots or leaves of a prostrate lifeform shrub originated from semiarid areas of China. The results suggested that desert plants could avoid or mitigate the high-salinity water in shallower soil layer and absorb the low-salinity dew on leaf surfaces. We also examined the relation between branch morphology and isotope ratios of leaf organic matter in a mangrove tree growing in per-arid areas on the Red Sea coast and found that the leaves of these trees enhanced intrinsic water-use efficiency in response to decreasing hydraulic conductivity of xylem by elongating branches. Our findings indicate that the stable isotope ratios of leaf organic matter and water are useful to assess the salt tolerance of desert plants.
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Report
(4 results)
Research Products
(12 results)