Growth, antioxidant activity and volatile compounds of lemon basil (Ocimum citriodorum Vis.) affected by led irradiance, nutrient concentration and postharvest stroge.
In this study, the effects of irradiance levels of LEDs of red and blue spectra, EC of nutrient solution, and nitrogen concentration on growth performance, yield productions, phytochemical contents (antioxidant activity), and volatile compounds of lemon basil (Ocimum citriodorum Vis.) were invest...
| Main Author: | |
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| Format: | Thesis |
| Language: | English English |
| Published: |
2020
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/112375/1/FP%202020%2052%20-%20IR.pdf |
| _version_ | 1825940119599710208 |
|---|---|
| author | Mat Daud, Zurafni |
| author_facet | Mat Daud, Zurafni |
| author_sort | Mat Daud, Zurafni |
| collection | UPM |
| description | In this study, the effects of irradiance levels of LEDs of red and blue spectra, EC
of nutrient solution, and nitrogen concentration on growth performance, yield
productions, phytochemical contents (antioxidant activity), and volatile
compounds of lemon basil (Ocimum citriodorum Vis.) were investigated. A lightemitting
diode (LEDs) has tremendous potential as a sole-source lighting system
for crop production in a controlledenvironment facility. Their small size, long
operating lifetime, durability, wavelength specificity, and relatively cool emitting
surfaces make these solid-state light sources idealfor use in the plant lighting
system. The objective of this study was to examine the effectsof varying irradiance
levels of LEDs with red and blue spectra (4 to 1 ratio) on the growth performance,
yield productions, and phytochemical contents (antioxidant activity) of lemon
basil (Ocimum citriodorum Vis.) in a controlled environment facility.
The effect of varying irradiance levels of LEDs of red and blue spectra on plant
growth can be seen on 12 days after planting and beyond. Similar trends of
responses were also seen in the plant canopy, leaf number, and leaf area.
Differences in all parameters measured were significant as the plant growth
advanced. The fresh weight of leaves, stem, and roots were markedly affected
by the treatments. Moreover, lemon basil cultivated at irradiance levels of LEDs
with red and blue spectra at 160 μmol m-2 s-1 also contributed to more significant
quality attributes such as chlorophyll a, total chlorophyll,carotenoid contents, total
flavonoid contents, and total phenolic contents as well as an individual phenolic
compound such as rosmarinic acid and gentisic acid, but lower in nitrate content
as compared with other irradiance levels. Data generated from this study
revealed that LEDs of red and blue spectra at irradiance level of 160 μmol m-2 s
1 could be used effectively as an artificial light source for the lemon basil
production under controlled environmental conditions.
In the subsequent study, the effects of different irradiance levels of LEDs of red
and blue spectra and electrical conductivity of the nutrient solution and
nitrogen concentrations on the growth performances, yield
productions and phytochemical contents (antioxidant activities) and volatile
compounds were determined. The results indicated that the high irradiance
levels of LEDs of red and blue spectra at 160 μmol m-2 s-1 and moderate
electrical conductivity of nutrient solution at 2.6 mS cm-1 and nitrogen
concentrations at mg L-1 contributed to better growth performance (plat height,
canopy diameter, and the number of leaves), higher yield production and
quality attributes as well as carotenoid contents, total flavonoid, and total
phenolic contents as well as caftaric acid concentration.
The postharvest quality of lemon basil (Ocimum citriodorum Vis.) stored under
different storage temperature at different storage period that cultivated under
different irradiance levels of LEDs of red and blue spectra was studied. The
results demonstrated that irradiance levels of LEDs, storage temperature, and
storage period affected the total flavonoid contents, total phenolic contents, and
antioxidant activity of lemon basil. Increasing temperature and irradiance levels
of LEDs increased total flavonoid and total phenolic contents, and antioxidant
activity of lemon basil. Storage temperature at 5˚C was better in retaining total
flavonoid contents and antioxidant activity, while storage temperature at 15˚C
was better in the retention of phenolic compounds concentration of caftaric and
rosmarinic acid.
Overall, the present study’s findings have improved our understanding of the
effects of irradiance levels of LEDs of the red and blue spectra, the electrical
conductivity of the nutrient solution, and nitrogen concentrations
and their interaction on lemon basil plants. Besides, this is beneficial
for optimizing irradiance levels and electrical conductivity of the nutrient
solution and nitrogen concentrations to enhance crop production and
quality. In addition, the storage temperature also crucial for better
postharvest quality attributes. |
| first_indexed | 2024-12-09T02:23:51Z |
| format | Thesis |
| id | upm.eprints-112375 |
| institution | Universiti Putra Malaysia |
| language | English English |
| last_indexed | 2024-12-09T02:23:51Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | upm.eprints-1123752024-10-01T08:30:35Z http://psasir.upm.edu.my/id/eprint/112375/ Growth, antioxidant activity and volatile compounds of lemon basil (Ocimum citriodorum Vis.) affected by led irradiance, nutrient concentration and postharvest stroge. Mat Daud, Zurafni In this study, the effects of irradiance levels of LEDs of red and blue spectra, EC of nutrient solution, and nitrogen concentration on growth performance, yield productions, phytochemical contents (antioxidant activity), and volatile compounds of lemon basil (Ocimum citriodorum Vis.) were investigated. A lightemitting diode (LEDs) has tremendous potential as a sole-source lighting system for crop production in a controlledenvironment facility. Their small size, long operating lifetime, durability, wavelength specificity, and relatively cool emitting surfaces make these solid-state light sources idealfor use in the plant lighting system. The objective of this study was to examine the effectsof varying irradiance levels of LEDs with red and blue spectra (4 to 1 ratio) on the growth performance, yield productions, and phytochemical contents (antioxidant activity) of lemon basil (Ocimum citriodorum Vis.) in a controlled environment facility. The effect of varying irradiance levels of LEDs of red and blue spectra on plant growth can be seen on 12 days after planting and beyond. Similar trends of responses were also seen in the plant canopy, leaf number, and leaf area. Differences in all parameters measured were significant as the plant growth advanced. The fresh weight of leaves, stem, and roots were markedly affected by the treatments. Moreover, lemon basil cultivated at irradiance levels of LEDs with red and blue spectra at 160 μmol m-2 s-1 also contributed to more significant quality attributes such as chlorophyll a, total chlorophyll,carotenoid contents, total flavonoid contents, and total phenolic contents as well as an individual phenolic compound such as rosmarinic acid and gentisic acid, but lower in nitrate content as compared with other irradiance levels. Data generated from this study revealed that LEDs of red and blue spectra at irradiance level of 160 μmol m-2 s 1 could be used effectively as an artificial light source for the lemon basil production under controlled environmental conditions. In the subsequent study, the effects of different irradiance levels of LEDs of red and blue spectra and electrical conductivity of the nutrient solution and nitrogen concentrations on the growth performances, yield productions and phytochemical contents (antioxidant activities) and volatile compounds were determined. The results indicated that the high irradiance levels of LEDs of red and blue spectra at 160 μmol m-2 s-1 and moderate electrical conductivity of nutrient solution at 2.6 mS cm-1 and nitrogen concentrations at mg L-1 contributed to better growth performance (plat height, canopy diameter, and the number of leaves), higher yield production and quality attributes as well as carotenoid contents, total flavonoid, and total phenolic contents as well as caftaric acid concentration. The postharvest quality of lemon basil (Ocimum citriodorum Vis.) stored under different storage temperature at different storage period that cultivated under different irradiance levels of LEDs of red and blue spectra was studied. The results demonstrated that irradiance levels of LEDs, storage temperature, and storage period affected the total flavonoid contents, total phenolic contents, and antioxidant activity of lemon basil. Increasing temperature and irradiance levels of LEDs increased total flavonoid and total phenolic contents, and antioxidant activity of lemon basil. Storage temperature at 5˚C was better in retaining total flavonoid contents and antioxidant activity, while storage temperature at 15˚C was better in the retention of phenolic compounds concentration of caftaric and rosmarinic acid. Overall, the present study’s findings have improved our understanding of the effects of irradiance levels of LEDs of the red and blue spectra, the electrical conductivity of the nutrient solution, and nitrogen concentrations and their interaction on lemon basil plants. Besides, this is beneficial for optimizing irradiance levels and electrical conductivity of the nutrient solution and nitrogen concentrations to enhance crop production and quality. In addition, the storage temperature also crucial for better postharvest quality attributes. 2020-08 Thesis NonPeerReviewed text en http://psasir.upm.edu.my/id/eprint/112375/1/FP%202020%2052%20-%20IR.pdf Mat Daud, Zurafni (2020) Growth, antioxidant activity and volatile compounds of lemon basil (Ocimum citriodorum Vis.) affected by led irradiance, nutrient concentration and postharvest stroge. Doctoral thesis, Universiti Putra Malaysia. Lamiaceae Phytochemicals Light emitting diodes English |
| spellingShingle | Lamiaceae Phytochemicals Light emitting diodes Mat Daud, Zurafni Growth, antioxidant activity and volatile compounds of lemon basil (Ocimum citriodorum Vis.) affected by led irradiance, nutrient concentration and postharvest stroge. |
| title | Growth, antioxidant activity and volatile compounds of lemon basil (Ocimum citriodorum Vis.) affected by led irradiance, nutrient concentration and postharvest stroge. |
| title_full | Growth, antioxidant activity and volatile compounds of lemon basil (Ocimum citriodorum Vis.) affected by led irradiance, nutrient concentration and postharvest stroge. |
| title_fullStr | Growth, antioxidant activity and volatile compounds of lemon basil (Ocimum citriodorum Vis.) affected by led irradiance, nutrient concentration and postharvest stroge. |
| title_full_unstemmed | Growth, antioxidant activity and volatile compounds of lemon basil (Ocimum citriodorum Vis.) affected by led irradiance, nutrient concentration and postharvest stroge. |
| title_short | Growth, antioxidant activity and volatile compounds of lemon basil (Ocimum citriodorum Vis.) affected by led irradiance, nutrient concentration and postharvest stroge. |
| title_sort | growth antioxidant activity and volatile compounds of lemon basil ocimum citriodorum vis affected by led irradiance nutrient concentration and postharvest stroge |
| topic | Lamiaceae Phytochemicals Light emitting diodes |
| url | http://psasir.upm.edu.my/id/eprint/112375/1/FP%202020%2052%20-%20IR.pdf |
| work_keys_str_mv | AT matdaudzurafni growthantioxidantactivityandvolatilecompoundsoflemonbasilocimumcitriodorumvisaffectedbyledirradiancenutrientconcentrationandpostharveststroge |