Uji Aktivitas Antioksidan, Uji Antikolesterol dan Toksisitas dari Ekstrak Etanol Daun Kemuning

Daun kemuning (Murraya paniculata L.Jack) secara empiris banyak digunakan sebagai antibakteri, anti inflamasi, penurun kadar kolesterol darah dan juga sebagai antioksidan. Tujuan penelitian adalah menguji aktivitas antioksidan, antikolesterol secara in vitro dan menguji toksisitas secara BSLT menggunakan ekstrak etanol daun kemuning. Daun kemuning diekstraksi menggunakan etanol 96% secara maserasi kinetik, selanjutnya ekstrak yang diperoleh dilakukan skrining fitokimia, diuji aktivitas antioksidannya menggunakan metode peredaman radikal bebas DPPH, uji antikolesterol menggunakan metode Liebermann-Burchard dan uji toksisitas menggunakan metode Brine Shrimp Lethality Test. Hasil skrining fitokimia menunjukkan bahwa ekstrak daun kemuning mengandung flavonoid, saponin, tanin, steroid/triterpenoid, minyak atsiri dan kumarin. Hasil uji aktivitas antioksidan ekstrak etanol daun kemuning diperoleh nilai IC50 sebesar 18,56 µg/mL, hasil uji aktivitas antikolesterol dengan nilai IC50 sebesar 593,95 µg/mL dan uji toksisitas dengan nilai LC50 sebesar 149,52 µg/mL. Berdasarkan hasil penelitian menunjukkan bahwa daun kemuning mempunyai aktivitas antioksidan yang sangat kuat dan dapat dimanfaatkan sebagai obat herbal.

In-Vitro Antifungal Activity of Azadirachta indica, Ocimum tenuiflorum & Murraya paniculata Leaf Extract against Three Phytopathogenic Fungi

Fungal disease is one of the major problems in agriculture. Fungal pathogens are accountable for approximately 85% of plant diseases. Apart from these, public health conditions are also influenced by consequential fungal infection as well as approximately 1.5 million killed and more than a billion people were affected by fungal disease. Our present exploration has been conducted to assess the antifungal efficiency of Azadirachta indica, Ocimum tenuiflorum, and Murraya paniculata leaf extract against three phytopathogenic fungi viz. Pichia kudriavzevii, Lasiodiplodia theobromae and Fusarium oxysporum, at the concentration of 300 µg/disc by food poisoned technique. The result showed that all of these three extracts have significant antifungal efficiency against all of the tested fungus. Maximum antifungal activity was recorded in Murraya paniculata with an inhibition percentage of 100% (0.00±0.000 mm) against three fungi. In addition, Lasiodiplodia theobromae and Fusarium oxysporum, growth was totally suppressed in terms of Ocimum tenuiflorum and Murraya paniculata extract. The lowest antifungal effect was 47.18% (34.33±0.272 mm) revealed in Azadirachta indica extract against Pichia kudriavzevii. Among these three extracts, the order of antifungal effect was Murraya paniculata˃Ocimum tenuiflorum˃Azadirachta indica. Amis of this screening to focus antifungal effects of three experimental medicinal plants. These findings indicate leaf of these three plants may be useful for the treatment of various diseases associated with these fungi and could be useful to develop novel, secure and fecund bio-fertilizer for pest control. Further phytochemicals analysis is required to evaluate the compounds responsible for their antifungal effects.

Predicting the establishment of Diaphorina citri and Tamarixia radiata on Citrus x aurantiifolia orchards based on the plant–psyllid–parasitoid interaction on Murraya paniculata

Background The insect vector of Huanglongbing, Diaphorina citri Kuwayama, 1908 (Hemiptera: Lividae) was detected in Ecuador in 2013 and its main parasitoid Tamarixia radiata (Waterston, 1922) (Hymenoptera: Eulophidae) was reported for the first time in 2017. In the citrus production region of Manabí province, Ecuador, D. citri and T. radiata were reported for the first time on Murraya paniculata L. in 2016 and 2018, respectively. D. citri was first found infesting Citrus x aurantiifolia (Christm.) Swingle in Manabí province at the end of 2018. The present study was conducted between August 2018 and May 2021 to: (1) monitor D. citri populations on M. paniculata and C. x aurantiifolia and determine the parasitism rates of T. radiata on D. citri nymphs on both host plants, (2) establish the occurrence of T. radiata parasitizing D. citri on C. x aurantiifolia, and (3) calculate a predictive model for estimating the number of parasitized nymphs on a planting lot of M. paniculata and a C. aurantiifolia orchard. Results Diaphorina citri populations on M. paniculata decreased from 11 nymphs (2018–2019) to approximately 2 nymphs per flush (2020). This was associated with a natural increase in parasitism rates of T. radiata from 20% (2018) to 96% in 2020. The regression equation (Y = 2.049Ln (x) + 5.88) was able to estimate the number of parasitized D. citri nymphs based on parasitism on M. paniculata (R2: 0.8315). Tamarixia radiata was first detected on C. x aurantiifolia in July 2020. Populations of D. citri reached 55 nymphs per flush (no parasitism) and subsequently decreased to the minimum level of 14 nymphs per flush (parasitism rates of up to 31%). The model allowed estimating the number of parasitized nymphs by T. radiata on M. paniculata and C. x aurantiifolia, with a maximum deviation of approximately 2 nymphs. Conclusions Based on the colonization and establishment of the psyllid–parasitoid interaction on M. paniculata, it is estimated that approximately by the end of 2022, populations of D. citri on C. x aurantiifolia would decline due to the highest percentages of parasitism by T. radiata. High parasitism rates may indicate the potential of T. radiata in conservation biological control and integrated pest management programs.

Antibacterial Activity of Ethanol Extract of Kemuning (Murraya Paniculata) Against Klebsiella pneumoniae ESBL by In Vitro Test

Klebsiella pneumoniae Extended-spectrum β-lactamase (ESBL) was one of the microorganism that cause nosocomial infection which resistant to beta-lactams antibiotics. Orange Jessamine (Murraya paniculata) was traditional medicine which believed has antibacterial components, such as: fl avonoids, alkaloids, essential oils, coumarins, terpenoids, tannins, and saponins. In the previous studies, there was antibacterial activity in ethanolic extract of Murraya paniculata againsts E.coli, K.pneumoniae, S.typhi, E.faecalis, P.aeruginosa, S.fl exneri, S.aureus, and S.sonneii with concentration 200 mg/ mL. There has not experiment about ethanolic extract of Murraya paniculata against Klebsiella pneumoniae ESBL yet. The aim of this study was to fi nd out the in vitro antibacterial activity of ethanol extracts of Murraya Paniculata against Klebsiella pneumoniae ESBL Broth dilution method with concentration 200 mg/mL, 100 mg/mL, 50 mg/mL, 25 mg/mL, 12,5 mg/mL, 6,25 mg/mL, and 3,125 mg/mL were used for the determination of the Minimal Inhibitory Concentration (MIC). While the Minimal Bacterial Concentration (MBC) was assessed using streaking method in Nutrient Agar Plate. The highest concentration in this study was obtained from 100 g of Murraya paniculata leaves dissolved in 500 mL of 40% ethanol. The study was carried out 4 times replication. At the time of the sterility test extract, germ growth appeared on Nutrient Agar Plate media, so the extract was fi ltered before being used for research. After incubation at 37 °C for 24 hours, growth of bacterial colonies on all agar plates was observed. The concentration of the ethanol extract of Murraya Paniculata (200 mg/mL) did not inhibit the growth of Klebsiella pneumoniae ESBL. The ethanol extracts of Murraya paniculata in concentration 200 mg/mL had no antibacterial activity against Klebsiella pneumoniae ESBL.