Abstract
Seagrass is the only flowering plant which has a true roots, leaves, and stems, an angiosperm plant that adapted to live entirely in the ocean. Seagrass produces several compounds which produced through secondary metabolism, one of the secondary metabolism is the phytochemicals. Seagrass ecosystem in Tanjung Benoa was discovered along Samuh Beach, where 9 kinds of seagrass species were found around the seagrass ecosystem in Tanjung Benoa. Samuh Beach has a tranquil water conditions and sandy substrate. The activities of marine tourism and hotel waste disposal in Tanjung Benoa waters cause major ecological pressure and physical pressure for the seagrass ecosystem. This study aims to determine the content of phytochemicals in the leaves and roots of seagrass. Screening method was used to determine the content of bioactive alkaloids, flavonoids, saponins, steroids, and tannin compounds. Each of these compounds has an important role in the seagrass. The existence of chemical compounds of the flavonoid, alkaloid and steroid groups in the roots and leaves of Cymodocea rotundata seagrass, Enhalus acoroides, Thalassia hemprichi, Halophila ovalis, Halophila minor, Halodule uninervis and Sryngodium isoetifolium in this study indicate that the seven species of seagrass has potential as a natural chemical antifouling, antifungal, and antibacterial.Then the seagrass will be protected from the danger of predators or epiphanies that interfere with the growth of seagrass and the ecosystems on Samuh Beach will remain intact.
Highlights
Abstrak Lamun merupakan satu satunya tumbuhan angiospermae atau tumbuhan berbunga yang memiliki daun, batang, dan akar sejati yang telah beradaptasi untuk hidup sepenuhnya di dalam laut
This study aims to determine the content of phytochemicals in the leaves and roots of seagrass
The existence of chemical compounds of the flavonoid, alkaloid and steroid groups in the roots and leaves of Cymodocea rotundata seagrass, Enhalus acoroides, Thalassia hemprichi, Halophila ovalis, Halophila minor, Halodule uninervis and Sryngodium isoetifolium in this study indicate that the seven species of seagrass has potential as a natural chemical antifouling, antifungal, and antibacterial.Then the seagrass will be protected from the danger of predators or epiphanies that interfere with the growth of seagrass and the ecosystems on Samuh Beach will remain intact
Summary
Lamun merupakan salah satu tumbuhan air yang banyak ditemukan di perairan Indonesia memiliki biji tertutup(angiospermae) atau tumbuhan berbunga yang memiliki daun, batang, dan akar sejati yang telah beradaptasi untuk hidup sepenuhnya di dalam laut (Tuwo, 2011). Senyawa metabolit sekunder ini bisa ditemukan pada suatu organ atau jaringan yang terpapar oleh stres dari lingkungan seperti infeksi atau serangan pathogen salah satunya pada daun dan akar lamun.Dalam penelitian ini bagian lamun yang digunakan adalah daun dan akarnya. Daun berfungsi sebagai tempat berlangsungnya proses fotosintesis sedangkan akar untuk menyimpan zat hara, menyokong tumbuhan dan menyimpan air (Haryanti, 2010).Salah satu bagian dari senyawa metabolit sekunder yaitu fitokimia dimana fitokimia merupakan senyawa bioaktif yang dihasilkan oleh tumbuhan salah satunya tumbuhan lamun (Rohmatussholihat, 2009). Beberapa penelitian mengenai fitokimia pada lamun telahbanyak dilakukan misalnyaolehTeffo et al,(2009) di Sulawesi Utara, Mardiyana et al,(2014) di Pulau Pramuka,Mani et al, (2012) di IndiadanSudirman et al, (2016).Namun di daerah Bali penelitian tentang fitokimia belum pernah dilakukan serta perbandingan fitokimia pada daun dan akar lamun juga belum pernah dilakukan, melihat dari fungsi dari fitokimia yang banyak digunakan untuk pembuatan obat– obatan maka penelitian ini perlu dilakukan
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