Shading effects on leaf gas exchange, leaf pigments and secondary metabolites of polygonum minus huds., an aromatic medicinal herb
The growing demand for high value aromatic herb Polygonum minus-based products have increased in recent years, for its antioxidant, anticancer, antimicrobial, and anti-inflammatory potentials. Although few reports have indicated the chemical profiles and antioxidative effects of Polygonum minus, no...
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| Format: | Article |
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MDPI AG
2021
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| _version_ | 1796983031505879040 |
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| author | Mohd Yusof, Fairuz Fatini Yaacob, Jamilah Syafawati Osman, Normaniza Ibrahim, Mohd Hafiz Wan-Mohtar, Wan Abd Al Qadr Imad Berahim, Zulkarami Mohd Zain, Nurul Amalina |
| author_facet | Mohd Yusof, Fairuz Fatini Yaacob, Jamilah Syafawati Osman, Normaniza Ibrahim, Mohd Hafiz Wan-Mohtar, Wan Abd Al Qadr Imad Berahim, Zulkarami Mohd Zain, Nurul Amalina |
| author_sort | Mohd Yusof, Fairuz Fatini |
| collection | UPM |
| description | The growing demand for high value aromatic herb Polygonum minus-based products have increased in recent years, for its antioxidant, anticancer, antimicrobial, and anti-inflammatory potentials. Although few reports have indicated the chemical profiles and antioxidative effects of Polygonum minus, no study has been conducted to assess the benefits of micro-environmental manipulation (different shading levels) on the growth, leaf gas exchange and secondary metabolites in Polygonum minus. Therefore, two shading levels (50%:T2 and 70%:T3) and one absolute control (0%:T1) were studied under eight weeks and 16 weeks of exposures on Polygonum minus after two weeks. It was found that P. minus under T2 obtained the highest photosynthesis rate (14.892 µmol CO2 m−2 s−1), followed by T3 = T1. The increase in photosynthesis rate was contributed by the enhancement of the leaf pigments content (chlorophyll a and chlorophyll b). This was shown by the positive significant correlations observed between photosynthesis rate with chlorophyll a (r2 = 0.536; p ≤ 0.05) and chlorophyll b (r2 = 0.540; p ≤ 0.05). As the shading levels and time interval increased, the production of total anthocyanin content (TAC) and antioxidant properties of Ferric Reducing Antioxidant Power (FRAP) and 2,2-Diphenyl-1-picrylhydrazyl (DPPH) also increased. The total phenolic content (TPC) and total flavonoid content (TFC) were also significantly enhanced under T2 and T3. The current study suggested that P.minus induce the production of more leaf pigments and secondary metabolites as their special adaptation mechanism under low light condition. Although the biomass was affected under low light, the purpose of conducting the study to boost the bioactive properties in Polygonum minus has been fulfilled by 50% shading under 16 weeks’ exposure. |
| first_indexed | 2024-03-06T11:00:34Z |
| format | Article |
| id | upm.eprints-95058 |
| institution | Universiti Putra Malaysia |
| last_indexed | 2024-03-06T11:00:34Z |
| publishDate | 2021 |
| publisher | MDPI AG |
| record_format | dspace |
| spelling | upm.eprints-950582023-01-09T02:10:42Z http://psasir.upm.edu.my/id/eprint/95058/ Shading effects on leaf gas exchange, leaf pigments and secondary metabolites of polygonum minus huds., an aromatic medicinal herb Mohd Yusof, Fairuz Fatini Yaacob, Jamilah Syafawati Osman, Normaniza Ibrahim, Mohd Hafiz Wan-Mohtar, Wan Abd Al Qadr Imad Berahim, Zulkarami Mohd Zain, Nurul Amalina The growing demand for high value aromatic herb Polygonum minus-based products have increased in recent years, for its antioxidant, anticancer, antimicrobial, and anti-inflammatory potentials. Although few reports have indicated the chemical profiles and antioxidative effects of Polygonum minus, no study has been conducted to assess the benefits of micro-environmental manipulation (different shading levels) on the growth, leaf gas exchange and secondary metabolites in Polygonum minus. Therefore, two shading levels (50%:T2 and 70%:T3) and one absolute control (0%:T1) were studied under eight weeks and 16 weeks of exposures on Polygonum minus after two weeks. It was found that P. minus under T2 obtained the highest photosynthesis rate (14.892 µmol CO2 m−2 s−1), followed by T3 = T1. The increase in photosynthesis rate was contributed by the enhancement of the leaf pigments content (chlorophyll a and chlorophyll b). This was shown by the positive significant correlations observed between photosynthesis rate with chlorophyll a (r2 = 0.536; p ≤ 0.05) and chlorophyll b (r2 = 0.540; p ≤ 0.05). As the shading levels and time interval increased, the production of total anthocyanin content (TAC) and antioxidant properties of Ferric Reducing Antioxidant Power (FRAP) and 2,2-Diphenyl-1-picrylhydrazyl (DPPH) also increased. The total phenolic content (TPC) and total flavonoid content (TFC) were also significantly enhanced under T2 and T3. The current study suggested that P.minus induce the production of more leaf pigments and secondary metabolites as their special adaptation mechanism under low light condition. Although the biomass was affected under low light, the purpose of conducting the study to boost the bioactive properties in Polygonum minus has been fulfilled by 50% shading under 16 weeks’ exposure. MDPI AG 2021-03-23 Article PeerReviewed Mohd Yusof, Fairuz Fatini and Yaacob, Jamilah Syafawati and Osman, Normaniza and Ibrahim, Mohd Hafiz and Wan-Mohtar, Wan Abd Al Qadr Imad and Berahim, Zulkarami and Mohd Zain, Nurul Amalina (2021) Shading effects on leaf gas exchange, leaf pigments and secondary metabolites of polygonum minus huds., an aromatic medicinal herb. Plants, 10 (13). art. no. 608. pp. 1-18. ISSN 2223-7747 https://www.mdpi.com/2223-7747/10/3/608 10.3390/plants10030608 |
| spellingShingle | Mohd Yusof, Fairuz Fatini Yaacob, Jamilah Syafawati Osman, Normaniza Ibrahim, Mohd Hafiz Wan-Mohtar, Wan Abd Al Qadr Imad Berahim, Zulkarami Mohd Zain, Nurul Amalina Shading effects on leaf gas exchange, leaf pigments and secondary metabolites of polygonum minus huds., an aromatic medicinal herb |
| title | Shading effects on leaf gas exchange, leaf pigments and secondary metabolites of polygonum minus huds., an aromatic medicinal herb |
| title_full | Shading effects on leaf gas exchange, leaf pigments and secondary metabolites of polygonum minus huds., an aromatic medicinal herb |
| title_fullStr | Shading effects on leaf gas exchange, leaf pigments and secondary metabolites of polygonum minus huds., an aromatic medicinal herb |
| title_full_unstemmed | Shading effects on leaf gas exchange, leaf pigments and secondary metabolites of polygonum minus huds., an aromatic medicinal herb |
| title_short | Shading effects on leaf gas exchange, leaf pigments and secondary metabolites of polygonum minus huds., an aromatic medicinal herb |
| title_sort | shading effects on leaf gas exchange leaf pigments and secondary metabolites of polygonum minus huds an aromatic medicinal herb |
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