Citation
Nur Farhanis Awang, . and Fui Ying Tsan, . Fruit ripeness effects on characteristics germination and desiccation tolerance of Syzygium myrtifolium Walp. seeds. pp. 40-50. ISSN 1985-0484
Abstract
To plant Syzygium myrtifolium Walp. on harsh urban sites planting materials of seed origin having better developed tap roots are preferred compared to those propagated from stem cuttings. However fully ripe fruits at 8 weeks after fruit set are heavily lost to birds. In the current study the unpalatable semi-ripe fruits at 7 weeks were found suitable for propagation. The seeds from the semi-ripe fruits showed mean germination rate of 93 and developed normal seedlings within 1 week although continued growth with increases in size and fresh weight (FW) in the fruits and seeds was significant towards completion of fruit ripening. Thus harvesting of fruits within the short period between these two fruit developmental phases is critical in the seed procurement process of this plant species. At the semi-ripe stage pericarp exhibiting mixture of red and black colour can be a practical guide to indicate the suitable time for harvesting the fruits. Nonetheless subsequent desiccation trial aimed to determine the storability of the seeds at postharvest found that the seeds obtained from both the semi-ripe and fully ripe fruits had drastic loss of germinability at seed moisture content of approximately 0.3 g H‚‚O/g FW. Storage of the seeds above this relatively high moisture level for future planting was detrimental because the seeds age rapidly when they remain metabolically active with high respiration rates. Microbial infestation will also be an added problem during seed storage. Therefore the seeds need to be sown fresh.
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Abstract
To plant Syzygium myrtifolium Walp. on harsh urban sites planting materials of seed origin having better developed tap roots are preferred compared to those propagated from stem cuttings. However fully ripe fruits at 8 weeks after fruit set are heavily lost to birds. In the current study the unpalatable semi-ripe fruits at 7 weeks were found suitable for propagation. The seeds from the semi-ripe fruits showed mean germination rate of 93 and developed normal seedlings within 1 week although continued growth with increases in size and fresh weight (FW) in the fruits and seeds was significant towards completion of fruit ripening. Thus harvesting of fruits within the short period between these two fruit developmental phases is critical in the seed procurement process of this plant species. At the semi-ripe stage pericarp exhibiting mixture of red and black colour can be a practical guide to indicate the suitable time for harvesting the fruits. Nonetheless subsequent desiccation trial aimed to determine the storability of the seeds at postharvest found that the seeds obtained from both the semi-ripe and fully ripe fruits had drastic loss of germinability at seed moisture content of approximately 0.3 g H‚‚O/g FW. Storage of the seeds above this relatively high moisture level for future planting was detrimental because the seeds age rapidly when they remain metabolically active with high respiration rates. Microbial infestation will also be an added problem during seed storage. Therefore the seeds need to be sown fresh.
Additional Metadata
Item Type: | Article |
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AGROVOC Term: | Syzygium |
AGROVOC Term: | Myrtaceae |
AGROVOC Term: | Plant physiology |
AGROVOC Term: | Seeds |
AGROVOC Term: | Ripeness |
AGROVOC Term: | Seed germinability |
AGROVOC Term: | Air drying |
AGROVOC Term: | Moisture content |
AGROVOC Term: | Germination rate |
AGROVOC Term: | Plant production (propagation) |
Depositing User: | Mr. AFANDI ABDUL MALEK |
Last Modified: | 24 Apr 2025 00:55 |
URI: | http://webagris.upm.edu.my/id/eprint/9886 |
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