(1) Faculty of Engineering, Shinshu University, Nagano 380-8553, Japan;(2) Princes Sirindhorn Peat Swamp Forest Research and Nature Study Center, Amphor Sungai Kolok, Naratiwat, 96120, Thailand;(3) Creative Research Initiative Souse (CRIS), Hokkaido University, Kita-21, Nishi 10, Kitaku Sapporo, 001-0021, Japan;(4) Laboratory of Plant Nutrition, Graduate School of Agriculture, Hokkaido University, Kita-9, Nishi-9, Kitaku Sapporo, 060-8589, Japan
Abstract:
We investigated the relationships between starch concentrations and activities of starch synthetic enzymes in sago palms (Metroxylon sagu Rottb.) under acid sulfate and mineral soil conditions. Plants grown naturally that had reached their maturated stage were sampled. We found that the growth in acid sulfate soil is lower than that in mineral soil and that starch granules were larger and there was more amylase activity in acid sulfate soil than in mineral soil. Lower amylase activity in mineral soil could eliminate the degradation of starch, making the smaller granules suitable for storing large amounts of starch in a limited space inside cells.
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(CRIS), Hokkaido University, Kita-21, Nishi 10, Kitaku Sapporo, 001-0021, Japan;(4) Laboratory of Plant Nutrition, Graduate School of Agriculture, Hokkaido University, Kita-9, Nishi-9, Kitaku Sapporo, 060-8589, Japan