ISHS Acta Horticulturae 769: XXVII International Horticultural Congress - IHC2006: International Symposium on Asian Plants with Unique Horticultural Potential
GRANULAR PROPERTIES OF PTERIDIUM AQUILINUM STARCH |
| Authors: | Qing-ming Cao, Hai-yan Zhong, Zhong-hai Li |
| Keywords: | bracken fern, eagle fern, granular properties, Pteridium aquilinum, SEM, starch, x-ray diffraction |
| Abstract:
The granular properties of Pteridium aquilinum starch have been studied using polarization microscope, scan electron microscope (SEM) and X-ray analytical diffractometer. These data showed that Pteridium aquilinum starch granules were uneven, spherical, nephroid or polygonal in shape. The surface was smooth and a navel dot was located at one side. There was an evident polarizing cross. The granular diameter was between 4.6 µm and 24.3 µm, with 11.9 µm as the average. The gelatinization temperature was 57-64-74°C. The x-ray diffraction pattern was C and similar to that of a potato’s. The crystallinity was 38.71% and it swelled as temperature enhancement. These indicate that Pteridium aquilinum starches had weaker bonding forces within the granules compared to maize starches. | |
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