Seed quality of Hyacinth beans (Lablab purpureus L.) influenced by drying methods and storage temperatures
Lablab purpureus or known as Hyacinth bean is a high-value legume that has potential as an important vegetable crop due to its dietary value which is high in protein content. It also has anti-cancer properties but the crop has remained unexploited. To promote the cultivation of this legume good q...
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| Format: | Thesis |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/113156/1/113156.pdf http://psasir.upm.edu.my/id/eprint/113156/ |
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| Summary: | Lablab purpureus or known as Hyacinth bean is a high-value legume that has
potential as an important vegetable crop due to its dietary value which is high in
protein content. It also has anti-cancer properties but the crop has remained
unexploited. To promote the cultivation of this legume good quality seeds would
be a prerequisite. Apart from the field related production factors, problems that
often occur in seed production are the post-harvest handling which includes
drying and storage. Therefore, this study was conducted to determine suitable
drying method and storage temperature for Hyacinth bean seed. Seeds were
harvested at 30 days after anthesis (DAA) and subjected to different drying
methods namely sun, shade, oven (35±2°C) and drying beads to obtain target
moisture content (14, 12, 10%). The experiment adopted the Completely
Randomized Design (CRD) with three replicates. Dried samples were taken
randomly for seed physical characteristics, moisture content and germination.
Results showed that, Hyacinth bean seeds dried using oven and drying beads
attained 10% moisture content within 24 hours while those dried under the sun
and shade required up to 72 hours to reach 10% MC. The most rapid rate of
drying was by using drying beads and seeds dried with drying beads recorded
the highest germination percentage (71%) and had high seed vigour index
(20.46). Both shade and drying beads gave good results with drying beads being
more economical for adoption by farmers. In contrast, sun and oven drying had
large number of dead seeds. Bead- dried seeds were then stored at two storage
temperature which are ambient (27.7-34.2°C; 74±5% RH) and fridge (2.0-5.0°C;
25±5% RH) for six months. Experiment was arranged in CRD with three
replicates. The results revealed that after six months of storage, seeds stored
under refrigerated temperature at ≤5.0℃ recorded higher germination (≥70%)
compared with (≤ 50%) in ambient temperature. Seed vigour index was also
higher (17.49) when stored under refrigerated temperature compared to ambient
(8.67). In addition, under ambient declining in antioxidant enzymes activities,
germination performance and seedling growth were recorded after six months of
storage. Therefore, it is best stored refrigerated ( ≤ 5℃ ) in order to retain storability. It is concluded that Hyacinth seeds were best to bead-dried to 10%
MC and further stored under refrigerated temperature in which the germination
and defence mechanism of the Hyacinth were maintained. |
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