| Budget Amount *help |
¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2017: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2015: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
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| Outline of Final Research Achievements |
In order to elucidate the carbon utilization in roots of Melaleuca cajuputi, a rhizospheric hypoxia-tolerant tree species, under rhizospheric hypoxia, analyses of enzymatic activities and metabolites in the metabolic pathways related to aromatic compounds such as lignin and transcriptome analysis were performed. The activity and RNA expression level of phenylalanine ammonia-lyase (PAL) were reduced shortly after the hypoxia treatment, but the enzyme activity recovered by 14 days after the treatment. The transient reduction and recovery of PAL activity upon rhizospheric hypoxia may relate to the high tolerance of this species to the rhizospheric hypoxia. Morphological responses such as aerenchyma development under rhizospheric hypoxia stress varied among the examined eight tropical tree species, which showed no clear relation with the extent of their tolerance to the stress.
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