Influence of cyclical water stress and duration on growth, physio-biochemical and leaf anatomy of mas cotek (Ficus deltoidea Jack)
Mas Cotek (Ficus deltoidea) is a local herb species that has recently gained commercial importance due to its usage in herbal medicine. It has been used as a tonic for women’s health, rejuvenation and treatments of pneumonia, migraine, stroke, dysentery, hypertension, diabetes and for improving b...
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| Format: | Thesis |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/84083/1/IPTSM%202019%207%20-%20ir.pdf |
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| Summary: | Mas Cotek (Ficus deltoidea) is a local herb species that has recently gained commercial
importance due to its usage in herbal medicine. It has been used as a tonic for women’s
health, rejuvenation and treatments of pneumonia, migraine, stroke, dysentery,
hypertension, diabetes and for improving blood circulation. Currently,
commercialization of Mas Cotek as ingredient in bottled drinks, herbal medicines
capsules, sachets of tea or coffee and oil, has led to increase in market demand for this
species. With increasing consumer demand, efforts must be initiated to increase the
supply of raw materials and concomitantly reduces exploitation of the species from its
native habitats. Information on the response between the levels of biochemical
compounds, growth and leaf anatomical changes with water stress is still lacking for Mas
Cotek. All experiments were conducted under a shaded rain-sheltered facility at the
Malaysian Agricultural Research Institute (MARDI) Research Station, Serdang. Plant
materials of MFD 4 accession, propagated from stem cuttings, were used. In the first
experiment, study was undertaken to examine the influence of duration and cyclical
water stress on growth, dry matter yield and partitioning; and biochemical compounds
of Mas Cotek. The study was carried out using a Randomized Completed Block Design
(RCBD) with a 4 x 3 factorial arrangements of four cyclical water stress [cyclical water
stress were achieved by withholding irrigation at 0 (well watered), 7, 14, and 21 days
intervals] and three durations of the stress imposition (60, 120 and 180 days after
treatment) with 6 replications. The effects on growth, dry matter production and
partitioning, growth analysis, biochemical compounds and leaf physiological
characteristics of Mas Cotek were recorded. Results from the experiments showed that
growth of plants were affected significantly by the cyclical water stress treatment. Water
stress significantly reduced all growth parameters with higher reductions in longer
duration of stress. Data showed that the responses to cyclic water stress was significantly
decreased and biochemical compound (vitexin, isovitexin and total phenolic content)
were significantly affected by water stress. Seven days CWS can be considered as a best option for manipulation to induce higher production of bioactive compounds of Mas
Cotek base on the duration of stress imposition. In the second experiment conducted, the
responses on physiological processes and leaf anatomy of Mas Cotek imposed with
different water regimes (well water and water stressed) were investigated. Cyclic water
stress resulted in significant decrease in photosynthesis rate, stomatal conductance,
transpiration rate and water use efficiency as compared to the well watered treatment.
Chlorophyll a, chlorophyll b, total chlorophyll content, SPAD relative chlorophyll
content, relative water content, chlorophyll fluorescence and leaf tissues were not
significantly affected by water stress except for spongy cells. In conclusion, Mas Cotek
plants are not sensitive to short term water stress and able to cope with mild water stress
conditions. |
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