| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
|
|---|
| Outline of Final Research Achievements |
Fallen leaves of Hemalayan Cedar inhibit the growth of neiboring plants. We elucidated the chemical structure of the active compound and evaluated its plant growth activity in soils. By spectral analyses, it was idetified as abscisic acid. It showed the activity in the presence of volcanic ash soil, alluvial soil, or calcareous soil. This compound was hardly absorbed by soils, which could be attributed to stereochemical factors rather than the degree of polarity. We quantified the amount of fallen leaves throughout the seasons and confirmed that they reached the maximum between spring and summer. The concentration of abscisic acid in fresh fallen leaves was also the largest in these seasons. These observations implied that abscisic acid might play a role in weed growth inhibition in the field.
|
