PERAN MIKORIZA PADA SEMAI Acacia mangium Willd. DARI BEBERAPA SUMBER BENIH YANG TUMBUH PADA TANAH KEKERINGAN
Acacia mangium willd. (mangium) is one of potential plants for rehabilitation of critical land caused by physical, biological, and chemical damage. Drought and limited availability of nutrients is a problem in critical land rehabilitation efforts. Plants that have mycorrhizal symbiosis tend to be mo...
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| Main Authors: | , |
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| Format: | Theses and Dissertations NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2012
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| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/98691/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=54704 |
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| Institution: | Universitas Gadjah Mada |
| Summary: | Acacia mangium willd. (mangium) is one of potential plants for rehabilitation of
critical land caused by physical, biological, and chemical damage. Drought and limited
availability of nutrients is a problem in critical land rehabilitation efforts. Plants that have
mycorrhizal symbiosis tend to be more resistant to the drought because external hyphae of
mycorrhizal will expand the surface of water uptake and it can infiltrate into
capillary pores so that water uptake for the host plant need will increase. This study aimed
to know the response and adaptation mechanisms of mangium in facing drought stress, to
investigate mycorrhizal roles in overcoming drought stress on mangium, and to select the
origin of mangium seed source that is tolerant to drought stress.
The study used mangium seedlings from four different seed sources and was
arranged in split plot pattern of randomized block design, with three factors. The first
factor (main plot) was mycorrhizal (with and without inoculation), the second factor (first
sub plot) was the watering interval treatments (3, 6, 9 and 12 days of watering), and the
third factor (second sub plot) is origin of the seed sources (Group A, Group B, Group C
and F-1 Wonogiri seed sources). Parameters observed in this study were the percentage of
mycorrhizal infection, height, diameter, total biomass, leaf relative water content, specific
leaf area, and root shoot ratio.
Mangium root infected by mycorrhizal decreased along with increasing level of
watering intervals. Mycorrhiza increased height-diameter growth and total biomass of
mangium for the entire seed source. Total biomass growth of seven month mangium was
significantly influenced by the origin of seed source. The highest total biomass was
derived from F-1 Wonogiri (7.14 grams) and followed by Group B (6.82 grams), Group C
(6.21 g) and Group A (5.84 g). Adaptation mechanisms of mangium seedlings during
drought stress were keeping the water status of the plant, improving plant roots system,
and thickening the leaf blades. |
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