Judul: The Study of Vanilla’s Water Uptake (Vanilla Planifolia A.) while Experiencing Terrestrial Root Dysfunction
Abstrak: Tanaman vanili sering kali terserang penyakit yang menyebabkan jaringan perakaran utama menjadi terputus sehingga fungsi mensuplai air dan hara ke daun terhenti. Penelitian dilakukan untuk mengevaluasi peran serapan air pada akar udara serta implikasinya terhadap pertumbuhan dan status air dalam jaringan saat tanaman vanili mengalami gagal fungsi akar utama. Penelitian dilaksanakan di Rumah Kaca Balittro pada periode Juli 2021-April 2022. Penelitian menguji faktor tunggal (pemberian akses serapan air pada akar udara saat tanaman vanili mengalami gagal fungsi akar utama) menggunakan desain Rancangan Kelompok Lengkap Teracak (RKLT) dengan ulangan sebanyak lima kali. Berdasarkan hasil penelitian, pemberian akses serapan air pada akar udara berpengaruh sangat nyata terhadap pertumbuhan tajuk. Tanaman dengan akses serapan air akar udara terbukti dapat menjaga pertumbuhan sulur dan daun dengan baik hingga pekan ke-8 setelah mengalami gagal fungsi akar utama, dibandingkan tanaman yang tanpa akses serapan air pada akar udara yang mengalami stagnasi tumbuh pada pekan ke-5. Di sisi lain, variasi respons perubahan status air jaringan tidak terdeteksi secara nyata sepanjang pengujian., Vanilla plants are often attacked by diseases causing the terrestrial root becomes disconnected so that the function of supplying water and nutrients to the leaves is stopped. This study aimed to evaluate the role of water uptake in aerial roots and its implications for growth and water status in tissues when vanilla plants experienced terrestrial root dysfunction. The research was carried out in the Balittro greenhouse in the period July 2021-April 2022. The study used a single factor (providing access to water uptake in aerial roots when the vanilla plant experienced terrestrial root dysfunction) in the Randomized Complete Block Design (RCBD) and was replicated 5 times. The results showed that providing access to water uptake in aerial roots had a very significant effect on crown growth. Plants with access to water uptake in aerial roots were proven to be able to maintain the growth of stem and leave well up to 8 weeks after experiencing terrestrial root dysfunction, compared to plants without access to water uptake in aerial roots which experienced stagnation in growth at 5 weeks. On the other hand, variations in the response to changes in tissue water status were not detected significantly throughout the research.
Keyword: Vanili, Gagal Fungsi Akar Utama, Pertumbuhan, Status Air Jaringan

Judul: Induksi Kalus Vanili (Vanilla planifolia Andrews) var. Sovania Agribun secara In Vitro
Abstrak: Vanili merupakan tanaman yang memiliki nilai ekonomis tinggi. Penyakit busuk batang vanili (BBV) yang disebabkan oleh Fusarium oxysporum f.sp. vanillae kerap menjadi masalah utama dalam pembudidayaan vanili. Pengadaan varietas unggul seperti Vanilla planifolia var. Sovania Agribun menjadi salah satu upaya dalam pengendalian BBV. Untuk mendukung ketersediaan bahan tanamnya, stek batang dapat dilakukan, namun cara tersebut membutuhkan waktu lama dan bahan induk yang banyak. Kultur jaringan dapat menjadi metode perbanyakan tanaman yang dapat dipilih. Penelitian ini bertujuan mendapatkan metode induksi kalus organogenik yang sesuai untuk pertumbuhan eksplan vanili menggunakan kombinasi zat pengatur tumbuh auksin dan sitokinin. Perlakuan kombinasi 2,4-D dan BAP berbagai konsentrasi, dengan eksplan pucuk apikal, buku ke-1, dan buku ke-2 digunakan dalam penelitian ini. Penelitian disusun menggunakan rancangan acak lengkap (RAL) dengan 9 ulangan untuk setiap perlakuan, pada masing-masing sumber eksplan. Kalus mulai tumbuh pada minggu ketiga hingga ketujuh setelah kultur. Persentase pembentukan kalus sebesar 66,67% dihasilkan dari buku ke-1 yang dikulturkan dalam media MS dengan perlakuan 1,0 mg/L 2,4-D + 0,5 mg/L BAP. Kalus yang terbentuk bertekstur remah dengan warna putih hingga putih-kekuningan, serta tekstur kompak dengan warna kuning. Kata kunci: 2,4-D, BAP, perbanyakan tanaman, toleran busuk batang., Vanilla is a plant that has high economic value. Vanilla stem rot disease (SRD) due to Fusarium oxysporum f.sp. vanillae is a major constraint to vanilla production in Indonesia. Procurement of superior varieties such as Vanilla planifolia var. Sovania Agribun is one of the efforts to control SRD. To provide a sufficient number of planting materials, stem cutting can be done but it requires extensive time and mother plant sources. In vitro culture techniques is an alternative for plant propagation. This study aimed to obtain a suitable method for an optimal organogenic callus induction using combinations of auxin and cytokinin. Treatment combinations of 2,4-D and BAP at various concentrations were applied on apical shoot, the first node, and the second node explants. The experiment was arranged using a completely randomized design (CRD) with 9 replications for each treatment for each explant source. Callus began to grow in the third to seventh week after culture. The first node explants showed better callus initiation, with 66,67% of explants forming callus when cultured on MS with 1,0 mg/L 2,4-D + 0,5 mg/L BAP. The callus had friable, white to yellowish-white in color, and yellow compact textures. Keywords: 2,4-D, BAP, plant propagation, tolerant to stem rot.
Keyword: 2,4-D, BAP, perbanyakan tanaman, toleran busuk batang

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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