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Articles by Erni Suminar
Total Records ( 3 ) for Erni Suminar
  Syariful Mubarok , Erni Suminar and Nadia Nuraniya Kamaluddin
  Ethylene regulates many aspects of plant growth and development. During the post-harvest handling of ornamental plants, ethylene presence must be minimized to prevent quality decrease of post-harvest life, such as petal abscission and leaf senescence. To minimize the ethylene effect, several prevention strategies were developed, such as inhibition of ethylene biosynthesis and ethylene perception. This review described the inhibition of ethylene perception through chemical compounds application. Inhibition of ethylene perception is a more effective technique compared to ethylene biosynthesis in preventing ethylene effect. This was due to both endogenous and exogenous ethylene can be blocked. 1-Methylcyclopropene (MCP) is one of the common chemical compound used as ethylene inhibitor. Two formulations of 1-MCP had been developed in the recent years, gas-released powder (volatile 1-MCP) and water-soluble powder (sprayable 1-MCP). Despite having the same active ingredient, the two formulations had different affinity in ethylene effect prevention. The effectiveness of 1-MCP had been widely investigated on several ornamental plants such as Chrysanthemum, Pelargonium, Kalanchoe, Grevillea. Recently, 1-MCP had been used to improve other plants such as and Phalaenopsis, Curcuma and Ginger.
  Sudarjat , Andra Leovika , Erni Suminar , Vijaya Isnaniawardhani , Muhamad Abdilah Hasan Qanit , Ardika Albi Fauzi and Syariful Mubarok
  Background and Objective: Dragon fruit is a popular cultivated fruit in Indonesia because of its nutritional value. Recently, farmers have begun to cultivate coloured varieties of dragon fruit such as yellow (Hylocereus megalanthus), red (H. polyrhizus), orange and black (H. Hybrid). However, the morphological characters of these varieties are yet to be elucidated. The objective of this study was to evaluate the morphological characters of four coloured dragon fruit varieties. Materials and Methods: Four dragon fruit genotypes (Hylocereus megalanthus, H. polyrhizus and two H. Hybrid) were cultivated in Pangandaran regency of Indonesia with an altitude of 10 m above sea level with the minimum and maximum temperature of 24 and 37°C, respectively. The experiment was conducted from November, 2017 to September, 2018. About 75 individual plants for each genotype were cultivated. Parameters related to plant growth such as growth rate, stem height, number of shoot and also plant phenotype were recorded during plant growth and development. Results: The result showed that the four dragon fruit genotypes each have different characterizations. The red variety has the best growth condition, while the yellow variety exhibited the lowest growth rate. Conclusion: This study concluded that the red variety is more suitable and adaptable to be cultivated in Pangandaran.
  Erni Suminar , Mita Indriani , Sulistyaningsih , Denny Sobardini , Noladhi Wicaksana and Syariful Mubarok
  Background and Objectives: Establishing new protocol for in vitro propagation of turmeric from vegetative tissue is needed to be studied more due to the demand of turmeric increased every year and also for producing a faster rhizome propagation and free-disease rhizome. The MS solid medium mostly used in in vitro culture. To make a faster explant multiplication, cytokinine must be supplemented to MS medium. The objective of this study was to study the effect of various cytokinins and concentration of Naphthalene Acetic Acid on the explant multiplication of turmeric. Materials and Methods: This study was conducted in the Laboratory of Tissue Culture, Faculty of Agriculture, Universitas Padjajaran. Young shoot of sprout rhizome was cultured in MS basal medium supplemented with different kinds of cytokinins (BAP, TDZ and Zeatin) were combined with 0.01 and 1.0 mg L–1 of NAA. All parameters were tested by analysis of t-student test at the 5% significance level. Results: Three kinds of cytokinins (BAP, TDZ and Zeatin) were combined with 0.01 and 1.0 mg L–1 of NAA and supplemented to MS solid medium. The result showed that TDZ was more effective than BAP and Zeatin for explant multiplication. The supplementation of TDZ combined with NAA resulted the best effect on shoot multiplication resulted in the highest shoot number compared with control but the supplementation of cytokinins affected in the root elongation resulted the short root length. Conclusion: It was concluded that supplementation of cytokinine in MS medium significantly effects on the shoot formation but inhibit the root elongation. The TDZ was the best type of cytokinine that affects shoot multiplication.
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