Judul: Metabolomics Analysis of Taro (Colocasia esculenta L.) Accessions Grown in Different Water Level
Abstrak: Talas merupakan tanaman amfibi yang mampu ditanam pada lahan kering dan basah. Mekanisme pertahanan tanaman pada kondisi cekaman yaitu dengan menghasilkan senyawa metabolit sekunder. Penelitian ini bertujuan untuk mengidentifikasi senyawa metabolit sekunder aksesi talas pada kondisi budidaya air yang berbeda. Penelitian dilakukan dengan perlakuan varietas Satoimo (V1), Jepang hijau (V2), Pratama (V3), Ketan (V4), dan Kuning (V5) dan perlakuan air kapasitas lapang 60% (A1), 80% (A2), 100% (A3), 120% (A4), dan 140% (A5). Hasil penelitian menunjukkan perlakuan air tidak berpengaruh nyata terhadap parameter vegetatif tanaman talas. Perlakuan varietas memberikan pengaruh nyata terhadap parameter vegetatif tanaman talas. Hasil analisis GCMS terhadap umbi talas kondisi kering dan genangan diperoleh 108 senyawa metabolit. Golongan senyawa metabolit sekunder yang teridentifikasi diantaranya asam lemak, alkaloid, poliketida, monoterpenoid, triterpenoid, fenolik, seskuiterpen, steroid, benzenoid, kuinon, dan metanol. Senyawa metabolit sekunder pada kondisi kering lebih tinggi dibanding kondisi genangan., Taro is an amphibian plant that can be grown on dry and wet land. The defense mechanism of plants under stress conditions is to produce secondary metabolites. This study aims to identify secondary metabolites of taro accessions under different water treatment. The research was conducted with the treatment varieties of Satoimo (V1), Jepang hijau (V2), Pratama (V3), Ketan (V4), and Kuning (V5) and field capacity water treatment of 60% (A1), 80% (A2), 100% (A3), 120% (A4), and 140% (A5). The results showed that water treatment had no significant effect on the vegetative parameters of taro plants. Varietal treatment had a significant effect on the vegetative parameters of taro plants. The results of the GCMS analysis of taro tubers in dry and flooded conditions revealed 108 metabolite compounds. The identified secondary metabolites included fatty acids, alkaloids, polyketides, monoterpenoids, triterpenoids, phenolics, sesquiterpenes, steroids, benzenoids, quinones, and methanol. Secondary metabolite compounds in dry conditions were higher than in flooded conditions.
Keyword: Field capacity, gcms, heatmap, secondary metabolites, taro tubers

Judul: Adaptation of taro (Colacasia esculenta (L.) Schoot) at different soil water availability
Abstrak: Indonesia is one of the countries with the greatest diversity of taro variety, while the study of taro's morphology and nutritional characteristics is limited. The aim of this study was to evaluate the anatomical of plant and nutritional value of taro tuber. This research observed fourteen genotypes of Colacasia esculenta (7 Eddoe types, 7 Dasheen types) and 3 Xanthosoma genotypes. In three blocks of replications, the eddoe and Xanthosoma genotypes were cultivated using cormel and the dasheen genotypes with sucker. Plant anatomy (leaf, stem, and root) and tuber nutritional characteristics were analyzed. From this research, explained that stomata and epidermis number, length from stomata and epidermis, number leaf epidermis, length of leaf and stem epidermis, also length of root epidermis, endodermis, cortex, and stele among 17 genotypes of taro were statistically different. The diversity of taro based on the nutrition content of tuber between 17 genotypes of taro was considered high, as represented by water, ash, fat, protein, carbohydrate, energy, and glucomannan, which were statistically different.
Keyword: keragaman, perubahan iklim, TALAS; CEKAMAN. AIR, KEKERINGAN, GENANGAN, TALAS, AIR

Judul: Asymptotic Distribution of Estimator for the Intensity Function of a Doubly Periodic Poisson Process
Abstrak: In this manuscript, estimation of the intensity function of a doubly periodic Poisson process is discussed. It is assumed that only a single realization of the Poisson process is observed in a bounded window [0,n]. It is also assumed that the period of the intensity function is known. The rate of consistency and asymptotic normality of the estimator are formulated. Finally, a confidence interval for the local intensity function is also formulated.
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