Pengaruh Tepung Daun Lemna (Lemna minor) Fermentasi pada Pakan Formulasi terhadap Pertumbuhan Ikan Gurame (Osphronemus gouramy)

Slamat Harianto Sukran; Indra Suharman; Adelina Adelina

doi:10.31258/jipas.9.2.p.86-93

Pengaruh Tepung Daun Lemna (Lemna minor) Fermentasi pada Pakan Formulasi terhadap Pertumbuhan Ikan Gurame (Osphronemus gouramy)

Ilmu Perairan (Aquatic Science) ◽

10.31258/jipas.9.2.p.86-93 ◽

2021 ◽

Vol 9 (2) ◽

pp. 86

Author(s):

Slamat Harianto Sukran ◽

Indra Suharman ◽

Adelina Adelina

Keyword(s):

Lemna Minor

Penelitian ini dilaksanakan pada bulan Desember 2016 s/d Februari 2017. Penelitian ini bertujuan untuk mengetahui jumlah tepung daun lemna fermentasi dalam pakan yang berpengaruh terhadap pertumbuhan dan efisiensi pakan ikan gurami (Osphronemus gouramy). Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan satu faktor, lima taraf perlakuan dan tiga ulangan. Ikan yang digunakan berukuran bobot rata-rata 1,5 g dan panjang 4 cm. Ikan dipelihara dalam keramba berukuran 1 m3 dengan padat tebar 25 ekor/m3. Perlakuan pada penelitian ini adalah pemberian pakan dengan penggantian tepung kedelai dengan tepung daun lemna fermentasi, adapun perlakuannya adalah kontrol P0 (0:100%), P1 (10:90%), P2 (15:85%), P3 (20:80%) dan P4 (25:75%) untuk kandungan protein 30%. Hasil penelitian menunjukkan bahwa tepung daun lemna fermentasi berpengaruh nyata (P<0,05) terhadap pertumbuhan, efisiensi pakan dan retensi protein. Hasil penelitian ini menunjukkan bahwa protein bungkil daun lemna yang difermentasi dapat menggantikan hingga 10% dari tepung kedelai dalam pakan untuk pertumbuhan ikan gurami.

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Low temperature x-ray microanalysis of frozen-hydrated tobacco leaves

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100111537 ◽

1984 ◽

Vol 42 ◽

pp. 284-285

Author(s):

S. Edith Taylor ◽

Patrick Echlin ◽

May McKoon ◽

Thomas L. Hayes

Keyword(s):

Low Temperature ◽

Lemna Minor ◽

Root Tips ◽

Tobacco Leaves ◽

X Ray ◽

Whole Cells ◽

Carbon Coated ◽

The Right ◽

Beam Currents ◽

The University

Low temperature x-ray microanalysis (LTXM) of solid biological materials has been documented for Lemna minor L. root tips. This discussion will be limited to a demonstration of LTXM for measuring relative elemental distributions of P,S,Cl and K species within whole cells of tobacco leaves.Mature Wisconsin-38 tobacco was grown in the greenhouse at the University of California, Berkeley and picked daily from the mid-stalk position (leaf #9). The tissue was excised from the right of the mid rib and rapidly frozen in liquid nitrogen slush. It was then placed into an Amray biochamber and maintained at 103K. Fracture faces of the tissue were prepared and carbon-coated in the biochamber. The prepared sample was transferred from the biochamber to the Amray 1000A SEM equipped with a cold stage to maintain low temperatures at 103K. Analyses were performed using a tungsten source with accelerating voltages of 17.5 to 20 KV and beam currents from 1-2nA.

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Elemental Analysis of Phloem Tissue in Lemna Minor Root Tips

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s1431927600003470 ◽

1980 ◽

Vol 38 ◽

pp. 798-799

Author(s):

Patrick Echlin ◽

Thomas Hayes ◽

Clifford Lai ◽

Greg Hook

Keyword(s):

Vascular Tissue ◽

Lemna Minor ◽

Atomic Weight ◽

Companion Cell ◽

Root Tips ◽

Phloem Tissue ◽

Cell Stage ◽

Phloem Parenchyma ◽

Parenchyma Cells ◽

Xylem Element

Studies (1—4) have shown that it is possible to distinguish different stages of phloem tissue differentiation in the developing roots of Lemna minor by examination in the transmission, scanning, and optical microscopes. A disorganized meristem, immediately behind the root-cap, gives rise to the vascular tissue, which consists of single central xylem element surrounded by a ring of phloem parenchyma cells. This ring of cells is first seen at the 4-5 cell stage, but increases to as many as 11 cells by repeated radial anticlinal divisions. At some point, usually at or shortly after the 8 cell stage, two phloem parenchyma cells located opposite each other on the ring of cells, undergo an unsynchronized, periclinal division to give rise to the sieve element and companion cell. Because of the limited number of cells involved, this developmental sequence offers a relatively simple system in which some of the factors underlying cell division and differentiation may be investigated, including the distribution of diffusible low atomic weight elements within individual cells of the phloem tissue.

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