Morphology and Distribution of Starch Granules from Trunking and Non-Trunking Sago Palm (Metroxylon sagu)
Sago palm (Metroxylon sagu) naturally grows in Malaysia and this species covers a large area in the state of Sarawak. The starch of sago palm is in its trunk. Sago palm is one of the oldest tropical plants exploited by man for its stem starch and one of the main starch-producing crops in the world....
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| Format: | Thesis |
| Language: | English |
| Published: |
2016
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/30682/2/Mohd%20Izzuddin%20bin%20Alias.pdf |
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| Summary: | Sago palm (Metroxylon sagu) naturally grows in Malaysia and this species covers a large area in the state of Sarawak. The starch of sago palm is in its trunk. Sago palm is one of the oldest tropical plants exploited by man for its stem starch and one of the main starch-producing crops in the world. The starch granule is mainly composed of amylose and amylopectin. Trunking sago palm is a normal sago palm with the trunk full with starch at the maturity stage. Meanwhile, the non-trunking sago palm is abnormal sago palm where the growth and development is stunted. The purpose of this research is to profile the morphology and distribution of starch from trunking and non-trunking sago palm from selected areas and selected time. The morphology and distribution of starch was viewed under Scanning Electron Microscope (SEM) and also Transmission Electron Microscope (TEM). The shape of the starch granules for trunking sago palm trunk was the same as non-trunking sago palm trunk, where the shape was oval and truncated. The average size of starch granules from trunk of both trunking and non-trunking sago palm are around 20-40 μm. The starch granules extracted from trunking and non-trunking sago palm leaves have disc shaped and oval, where the size of granules range between 1-5 μm. In TEM, the growth rings formation in the trunk of trunking and non-trunking sago palm were the same; they were made up of alternating amorphous and semi-crystalline layers. Fourier Transform Infrared (FTIR) analysis showed there were no differences between trunking and non-trunking sago palm functional group. The starch granule distribution of trunking sago palm were not significantly difference from non-trunking sago palm. |
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