Shoot Multiplication and Callus Induction of Labisia pumila var. alata as Influenced by Different Plant Growth Regulators Treatments and Its Polyphenolic Activities Compared with the Wild Plant.
This study aims to investigate whether the in vitro-cultured L. pumila var. alata has higher antioxidant activity than its wild plant. An 8-week-old L. pumila var. alata nodal segment and leaf explants were cultured onto Murashige and Skoog (MS) medium supplemented with various cytokinins (zeatin, kinetin, and 6-benzylaminopurine (BAP)) for shoot multiplication and auxins (2,4-dichlorophenoxyacetic acid (2,4-D) and picloram) for callus induction, respectively. The results showed that 2 mg/L zeatin produced the optimal results for shoot and leaf development, and 0.5 mg/L 2,4-D produced the highest callus induction results (60%). After this, 0.5 mg/L 2,4-D was combined with 0.25 mg/L cytokinins and supplemented to the MS medium. The optimal results for callus induction (100%) with yellowish to greenish and compact texture were obtained using 0.5 mg/L 2,4-D combined with 0.25 mg/L zeatin. Leaves obtained from in vitro plantlets and wild plants as well as callus were extracted and analyzed for their antioxidant activities (DPPH and FRAP methods) and polyphenolic properties (total flavonoid and total phenolic content). When compared with leaf extracts of in vitro plantlets and wild plants of L. pumila var. alata, the callus extract displayed significantly higher antioxidant activities and total phenolic and flavonoid content. Hence, callus culture potentially can be adapted for antioxidant and polyphenolic production to satisfy pharmaceutical and nutraceutical needs while conserving wild L. pumila var. alata.
['Najhah|Mat Yunus|MY|', 'Jaafar|Hawa Z E|HZE|', 'Nakasha|Jaafar Juju|JJ|', 'Hakiman|Mansor|M|0000-0001-6074-8625']
D015084:2,4-Dichlorophenoxyacetic Acid D000975:Antioxidants D001593:Benzyl Compounds D001713:Biphenyl Compounds D002146:Bony Callus D003470:Culture Media D019587:Dietary Supplements D005419:Flavonoids D066298:In Vitro Techniques D007701:Kinetin D019800:Phenol D010846:Picloram D010851:Picrates D010937:Plant Growth Regulators D018515:Plant Leaves D010940:Plant Proteins D018517:Plant Roots D018520:Plant Shoots D010944:Plants D059808:Polyphenols D029623:Primulaceae D011687:Purines D015026:Zeatin
shoot multiplication callus induction Labisia pumila var. alata plant growth regulator polyphenolic activities antioxidant activities