INVENTARISASI JENIS TUMBUHAN MANGROVE DI AREA TAMAN WISATA BHADRIKA PROVINSI BENGKULU

This study aims to determine the types of mangrove plants in the Bhadrika tourist park, Bengkulu Province. This study uses the method of observation. The data obtained are then immediately taken to the laboratory for identification. The identification process by observing the roots, stems, leaves, flowers and fruit. The mangroves found were, Avicennia alba, Lumnitzera racemosa, Excoecaria agallocha, Aegiceras corniculatum, Bruguiera cylindrical. There were 5 types of mangroves in the Bhadrika Tourism Park which belonged to 5 families.

Pesticidal Activity of Sundarban Mangrove Plant Extracts against Sitophilus Pests and Identification of Active Constituents Using LC-MS

Plants act as a rich source of novel natural pesticides. In the backdrop of the recent revival of interest in developing plant-based insecticides, this study was carried out to investigate the pesticidal activity of Sundarban mangrove plants. A total of nine different plant parts from five plants, namely, Aegiceras corniculatum, Excoecaria agallocha, Heritiera fomes, Xylocarpus moluccensis, and Xylocarpus granatum, were extracted with methanol and tested for insecticidal activity against two common stored product pests Sitophilus oryzae and Sitophilus zeamais using direct contact feeding deterrent wafer disc method. Three bark extracts from A. corniculatum, E. agallocha, and H. fomes showed potent and statistically significant insecticidal activity against both S. oryzae and S. zeamais pests (80–100% mortality). All the active bark extracts were further fractionated using C-18 solid-phase extraction (SPE) columns and tested for their insecticidal activity against S. oryzae pest to identify the active fraction. Only the SPE4 fraction (100% MeOH) from all the three active plants showed the activity against S. oryzae pest with a lethal concentration 50% (LC50) value of 0.5, 1.0, and 1.5 mg/disc for A. corniculatum, E. agallocha, and H. fomes, respectively. The active fraction of A. corniculatum was further profiled for identification of active compounds using LC-ESI-MS and identified (along with some unknown peaks) two previously reported compounds at m/z 625.17630 (isorhamnetin 3-O-rutinoside) and 422.25346 (paspaline) as major constituents. Insecticidal activities of these plants are reported in this study for the first time and would be useful in promoting research aiming for the development of new biopesticides from mangrove plants.

Nutritional Value Content in Mangrove Syrup From Sonneratia alba Fruit

Pedada fruit (Sonneratia alba) is a fruit of mangrove plants whose utilization can be improved through simple technology, namely the processing of Sonneratia alba fruit into syrup. Mangrove plants produce fruit that can be utilized as a processed beverage, one of which is Sonneratia alba fruit that has a sour taste and can be processed into fresh drinks in the form of mangrove syrup. The purpose of the study was to find out the nutritional value content of mangrove syrup from Sonneratia alba fruit. Research methods are experiments. We use proximal analysis, which includes tests on protein, fat, carbohydrate, and vitamin C. Proximal analysis is carried out at the organic chemistry laboratory, Faculty of MIPA Universitas Jenderal Soedirman. The results of our research show Processed mangrove syrup from Sonneratia alba fruit has nutritional content: protein 1.20%, fat 0.20%, carbohydrates 3.50%, and vitamin C 55.30%. Mangrove fruit from Sonneratia alba processed into syrup has a high nutritional and antioxidant value and is rich in fiber, which is good for health

The solutions for construction of sea dike and sea embankments system as the sandy mud trap to support mangrove plants in the coastal zone of Hai Phong city, Vietnam

Mangrove plants play a viral role in protecting the coast, retraining erosion. Especially in areas considered the variable wave conditions, complex dynamic conditions such as the coastal region of Hai Phong city. However, due to various reasons, the development/additional planting of mangrove forests in the coastal area of Hai Phong in some locations has not achieved the desired result. This study was conducted survey measurements of mangroves, terrain, and practical experience to assess the ecological impact of certain dynamic and sedimentary conditions on mangroves. Thereby proposing several solutions to build sea dykes/embankments suitable to Hai Phong conditions, strengthen sediment traps, and create favorable conditions for developing mangrove trees in this area.

\(\textit{In vitro}\) antioxidant, α-amylase and α-glucosidase inhibitory activities of endophytic bacteria from the roots of the mangrove plant \(\textit{Rhizophora stylosa}\) Griffith

Mangrove is one of the highly productive ecosystems and contains diverse plants and microbial communities. Bacterial endophytes from mangroves are considered as a prolific source of biological molecules with important functions in the protection of mangrove plants against herbivores, insects as well as pathogens. The present study aimed to isolate endophytic bacteria from the roots of mangrove plant Rhizophora stylosa and to screen antioxidant,

Review: Antioxidant Activity Test of Various Types of Mangroves

Free radicals are reactive oxygen that have unpaired electrons looking for partners by binding to electron molecules in the vicinity. Free radicals can cause several degenerative diseases such as diabetes, atherosclerosis, Parkinson's disease, Alzheimer's disease. The content of secondary metabolites in mangroves has the potential to prevent various diseases. Several methods commonly used to estimate the presence of antioxidants in plants include DPPH (2,2-diphenyl-1-picrylhydrazyl), FRAP (ferrous reducing antioxidant power), and ABTS (2,2-azinobis-3-ethylbenzothiazole-6-sulfonic acid). The results of recent studies showed that some mangrove plants have antioxidant activity including: Rhyzophora mucronata, Nypa fruticans, Avicennia marina, Sonneratia alba, Acanthus ilicifolius L, Acrostichum aureum dan Scaevola taccada. Mangrove plants that have the highest IC50 value were found in leaves (methanol extract). The antioxidant activity of mangrove plants is caused by the presence of secondary metabolites contained in the extract such as flavonoids, phenolics, saponins, and tannins.