Metroxylon Sagu Research Articles

Morphological characters of Rhynchophorus spp. (Coleoptera:Curculionidae) associated with sago, coconut, and oil palm in Indonesia

Rhynchophorus weevil is known as the most damaging insect pest of palms worldwide and the major pest in sago (Metroxylon Sagu) and coconut (Cocos nucifera) in Indonesia. Nowadays, Rhynchophorus weevil has become a threat to oil palm (Elaeis guineensis) since 2018. This study aims to identify Rhynchophorus spp. morphological characteristics and pronotal color pattern polymorphism in sago, coconut, and oil palm using 16 morphological characters, i.e., length and width of pronotum, elytra, and rostrum. The variations between samples were assessed by one-way ANOVA and principal component analysis (PCA). The results showed three types of pronotal patterns, specifically to the weevil species. They were red stripe, red stripe-spot marking, and black for oil palm, coconut, and sago, respectively. There were no significant differences in all morphological characters of Rhynchophorus spp. in coconut and oil palm. In contrast, 12 morphological characters of Rhynchophorus spp. in sago were different from oil palm and coconut. The Rhynchophorus associated with oil palm and coconut has differences in the pronotal color pattern but has similarities in all morphological characters, identified as R. vulneratus. The Rhynchophorus associated with sago has black pronotal color, and the smaller size is alleged to be R. bilineatus.

The potential for developing sago-taro intercropping in South Sulawesi: a review

FAO predicts that by 2050, food production will need to increase by up to 60 percent, while at the same time there will be a scarcity of agricultural resources, especially land / land and water. Therefore, modernization of agriculture, exploiting the potential of marginal land resources and high adaptation-powered food crops such as sago (Metroxylon sagu Rottb) is an option. However, investment in sago cultivation is seen as inefficient because it is long-term so it is not attractive, especially for poor farmers. This review is aimed at discussing the potential of developing sago plants efficiently through the introduction of Japanese taro plant, satoimo (Colocasia esculenta var antiquorum) into sago plantations, forming the sago-taro intercropping system in South Sulawesi. It was found that the native sago vegetation area in South Sulawesi, namely in the Luwu Raya regions, was socio-economically and culturally and ecologically potential for developing sago plants. It is also known that satoimo taro has a high economic potential, and is ecologically tolerant of shade so that it can be introduced into sago plantations — up to four or five years old — to form intercropping plantations. It can be concluded that intercropping of sago-taro, both of ecologically and socio-economically and culturally has high potential to be developed in South Sulawesi, especially in the Luwu Raya regions.

Keragaman Morfologi dan Genetik Beberapa Aksesi Tanaman Sagu (Metroxylon Sagu Rottb.) Berdasarkan Penanda Molekuler Gen Mat-K

Sago palm (Metroxylon sago Rottb.) is one of the carbohydrate-producing crops that has great potential in supporting food security programs. This study aims to determine the morphological and genetic diversity based on the mat-K gene marker of 15 accessions of sago pal that have been collected by the Sago Research Consortium. This research was conducted by preparing plant samples, extracting DNA, amplifying DNA with a PCR tools, visualizing the results of DNA amplification, sequencing, editing DNA sequencing, and blasting. The results showed that the sago palm accessions collected by the UNIPA Sago Research Consortium were morphologically different in the Russet stages. Based on the maturase K (mat-K) gene marker of 15 sago palm accessions were divided into two haplotypes, namely haplotype 1 which experienced deletion at base number 5 (amino acid phenylalanine) and haplotype 2 which did not experience deletion so it had phenylalanine amino acid. Phylogenetic analysis showed that 15 sago palm accessions were divided into 2 groups, namely group 1 and group 2. Sago palm were observed closely related to Metroxylon warburgii with genetic distance of 0.001.

Differential Metabolites Markers from Trunking and Stressed Non-Trunking Sago Palm (Metroxylon sagu Rottb.)

Background: Sago palm is an important agricultural starch-producing crop in Malaysia. The trunk of sago palm is responsible for the the starch to reach maturity for harvesting after ten years. However, there are sago palms that fail to develop thier trunk after 17 years of being planted. This is known as a stressed “non-trunking” sago palm, which reduces the economic value of the palms. Objective: The study was initiated to compare the differences in metabolite expression between trunking and non-trunking sago palms and secondly to determine the potential metabolite- makers that are related to differential phenotypes of sago palms. Methods: Metabolites were extracted using various solvents and analysed using NMR spectroscopy and GC-MS spectrometry. Data obtained were subjected to principal component analysis. Results: The study determined differential metabolites expression in the leaf extracts of normal trunking sago palm compared to the non-trunking palms. Metabolite groups differently expressed between trunking and non-trunking sago palm are oils and waxes, haloalkanes, sulfite esters, phosphonates, phosphoric acid, thiophene ester, terpenes and tocopherols. GC-MS analysis of Jones & Kinghorn extraction method determined two sets of metabolite markers, explaining the differences in metabolites expression of trunking and nontrunking sago palms in ethyl acetate and methanol extract of 89.55% comprising sulfurous ester compounds and 87.04% comprising sulfurous ester, sulfurous acid and cyclohexylmethyl hexyl ester, respectively. Conclusion: Two sets of metabolite markers were expressed in the trunking and nontrunking sago palms. These metabolites can potentially be used as markers for identifying normal and stressed plants.

Physicochemical properties of microwave heated sago (Metroxylon sagu) starch

Sago starch is an underutilized starch due to its low functionality in food formulation. Modification is effective in improving starch functional properties. In this study, the starch were modified to enhance its functional properties. The starch was microwave-heated with different treatment durations of 5, 10, 15, or 20 min, separately, yielding microwave-heated starches (MHT1, MHT2, MHT3, and MHT4). The modified starches have irregular shaped granules and fissures while maintaining their mean diameters. The degree of double helix had increased, indicating more double helix structure of amylose formed. The modified starches’ moisture content, solubility, and paste clarity were significantly decreased. The MHT4 had its swelling power and syneresis increase. In conclusion, the treatment duration influenced the physicochemical properties of the sago starch, which is related to the formation of amylose double helix structure. Further study should focus on the formation of double helix structure in starch and its impact towards food structure.

Changes in the Biomass Production of the Sago Palm (Metroxylon sagu Rottb.) with Age in the Natural Forest of South Sorong, West Papua, Indonesia

Changes in the Biomass Production of the Sago Palm (Metroxylon sagu Rottb.) with Age in the Natural Forest of South Sorong, West Papua, Indonesia

The impact of different soil water levels on nitrogen, phosphorus, and potassium uptake, photosynthetic performance, and sugar distribution of sago palm seedlings

AbstractUnder high soil water levels, an imbalance occurs in the utilization of photosynthate between supporting vegetative growth and storage as starch. This results in a reduction in the density of dry matter in the stem and increased plant size. On the other hand, biomass yield and starch yield are considered to be low. This study examined the response of sago palm (Metroxylon sagu Rottb.) seedlings to 50 and 80% soil water levels. To determine the response of the plant, several parameters were observed during the experiment: N, P, and K uptake, leaf photosynthesis, plant morphological growth, and sugar content in plants. It was found that the sago palm was able to show good growth performance under both 50 and 80% soil water levels. However, 50% soil water level is preferable due to trends in N, P, and K uptake, leaf photosynthetic rate, morphological growth performance, and also because no loss of starch is evident in the petiole or root.

The Constraints to Sago Development and Improvement Efforts in Siau Tagulandang Biaro (Sitaro) Islands

Sago (Metroxylon sago Rottb) is very suitable as a food ingredient because it contains carbohydrates in starch form and high calories. In eastern Indonesia, the sago plant has important social, economic, and ecological roles for most societies because it is also used as a staple food. On the contrary, its development still requires powerful and maximum support. This study aims to describe the diversity of cultivation technology applications and the constraints of sago development. The research was carried out in a plantation area in the Siau Tagulandang Biaro (Sitaro) Islands Regency, North Sulawesi Province, from June to December 2016. The research used a survey method with semi-structured interview techniques on 60 respondents and focus group discussion (FGD) techniques. The research results that have been carried out indicate that farmers have not fully implemented good sago cultivation technology. However, they understand the economic value of this plant. The components of cultivation that were still weak were the weed control aspects and pest and disease control, as well as the post-harvest aspects in terms of sago pith processing techniques.

Factors Determining Sago Starch Import Demand: Empirical Evidence from Japan

Sago starch (Metroxylon sagu Rottb.) is one of the starches imported into Japan. Recently, sago starch has been promoted as a healthy type of starch because it is gluten-free and non-allergenic. This study aims to identify the factors affecting sago starch import demand during the period 1978–2017 in Japan by using a double logarithmic linear function. The study revealed that the price of sago starch, GDP, aging population rate and tariff-rate quota policy are significant factors influencing sago starch importation in Japan.

ANALISIS SOSIAL DAN EKONOMI AGROFORESTRI BERBASIS TANAMAN SAGU (Metroxylon sagu): ALTERNATIF REHABILITASI HUTAN DAN LAHAN GAMBUT

Metroxylon sagu-based agroforestry can be an alternative pattern of rehabilitation of forests and peatlands. The study aimed to determine the social and economic aspects of Metroxylon sagu-based agro forestry activities in Pilang Village, Pulang Pisau Regency, Central Kalimantan. Pilang Village a village located in a peat area. The research methodis a survey method with interviews and questionnaires. Respondents as there search sample were farmers who were selected purposively along with as many as 40 people with the criteria of having an area of land > 0.25 ha and there were Metroxylon sagu plants. Data analysis uses descriptive qualitative and quantitative analysis for financial feasibility analysis (NPV and BCR). The results showed that socially Metroxylon sagu plant selection was determinedby: (1) hereditary (37.5%); (2) easy planting and maintenance (27.5%); (3) sourcesofincome (22%); and (4) others (12.5%). Metroxylon sagu-based agroforestry patterns can be distinguished by other types of vegetation, namely: (1) Metroxylon sagu, rubber and filler plants (32,5%); (2) Metroxylon sagu, rubber and wood (5%); (3) Metroxylon sagu, rubber, fruits and fill plants (20%); (4) Metroxylon sagu, fruit and plant fillings (42,5%). The contribution of Metroxylon sagu to Metroxylon sagu-based agroforestry revenuesis 7,63%. Based on commodity Metroxylon sagu, NPV value (5%) Rp102,464,359.8; (10%) Rp49,180,666.67; (15%) Rp47,0423,376.8 and BCR value (5%), (10%), (15%) is 23.47. Based on social and economic analysis, Metroxylonsagu-based agroforestry is recommended as an alternative to forest and peatland rehabilitation.

Realizing Minimum Service Standards for Food Based on Local Wisdom in Central Halmahera Regency

Realizing minimum service standards in the food sector is the responsibility of the Government in general, and the Government of Central Halmahera Regency in particular. Various efforts have been made, among others, through the approach of implementing "local wisdom" on food. The local wisdom in question is a culture passed down from generation to generation by the community that sago (Metroxylon sago Rottb) is the staple food after kasbi (cassava / Manihot esculenta Crantz), betatas (sweet potato / Ipomoea batatas L), banana (Musa paradisiaca L) , and maize (Zea mays L). However, in the end all of them have become alternative foods, replaced by rice (Oriza sativa L.). There are socio-cultural values contained therein that want to be preserved through this study. This study is a descriptive subjective which tries to integrate between intuitive experience and an understanding of the opportunities that exist The essence of local wisdom to food based on several previous studies and studies shows that there are other values that accompany it, namely the realization of food security in the area concerned, this is shown by the results of research by Tuti Gantini (2016). which states that “vulnerability to food insecurity with local wisdom is smaller than on vulnerability to food insecurity without local wisdom ”. According to Tupan (2014), "One of the efforts to increase the acceleration of the movement to diversify food consumption in order to achieve food security is to restore the diversification pattern of food consumption that has taken root in society as local wisdom" According to Soerjani (2005) in Marcus J. Pattinama (2009). ), by exploring and developing local wisdom, it can not only be relieving, but can also be avoided (preventing) due to the large amount of resources for the next generation. The results of the study here ultimately point to the efforts that need to be done, namely: (1). Preserving Local Wisdom and Culture on Food, (2). Collaborating skills with local wisdom on food, (3). Focus on cultivating selected superior commodities, (4). Capacity and capability enhancement, and (5). Synergy, integrity, communication and collaboration between related agencies. From the results of this study, it is hoped that the Regional Government as a stakeholder should be consistent and committed to implementing these efforts

Studies on Growth Characteristics and Starch Productivity of the Sago Palm (Metroxylon sagu Rottb.) Folk Varieties in Seram and Ambon Islands, Maluku, Indonesia

Studies on Growth Characteristics and Starch Productivity of the Sago Palm (Metroxylon sagu Rottb.) Folk Varieties in Seram and Ambon Islands, Maluku, Indonesia

Different starch sources affect physical characteristics of extruded feeds prepared for the Malaysian mahseer, Tor tambroides

ABSTRACT Starches from three local crops (sago, Metroxylon sagu; cassava, Manihot esculenta; and taro, Colocasia esculenta) were tested as replacements for corn starch in the production of extruded feed for the Malaysian mahseer, Tor tambroides . Four test feeds were formulated to contain 40.00% protein and 23.44% starch, and extruded using a single-screw extruder (120 rpm speed, 2 mm diameter die head). Temperatures at the feeding, mixing, compressing, and die zones were set at 60°C, 100°C, 120°C, and 160°C, respectively. Physical properties used to evaluate the quality of the extrudates were expansion ratio, bulk density, true density, pellet durability index, water stability, floatability index, sinking velocity, and sample microstructure. Results showed that test starches produced extrudates with fairly equal quality to corn starch extrudates for expansion ratio, pellet durability index, pellet durability index, and floatability index. Cassava starch extrudates had the best external appearance observed under electron microscopy. This study shows the potential that these three starches have in aquafeed production especially in producing quality Malaysian mahseer feed.

UJI LAPANG MESIN PENGOLAHAN SAGU PRODUKSI BENGKEL PERMESINAN AGROINDUSTRI UNIVERSITAS PAPUA

Papua and West Papua Province have the large potential of sago palm (Metroxylon sagu), however, until now the production and utilization is very low compared with its potential. This is because of most farmers in this area still use traditional method in processing sago. The traditional method is labour intensive and time consuming process. Sago farmers in this area still apply traditional ways to process sago starch due to the lack of processing machines. The objective of this research was to conduct field testing of sago processing machine produced by Agroindustry Machinery Workshop of Papua University. The machines that have been tested consist of cylinder type sago rasping machine and stirrer rotary blade sago starch extraction machine. The machine’s performance under field condition was evaluated by measuring parameters (a) rasping capacity, (b) extraction capacity, (c) starch percentage, (d) starch yield and (e) starch loss in waste. Results showed that all parts of the machine are functioning properly and farmers can easily operate the machine. The performances of the machines under field condition were (a) rasping capacity 1,159. 8 kg/hour, (b) extraction capacity 243.8 kg/hour, (c) starch percentage 38.26 %, (d) starch yield 93 kg/hour and (e) starch loss in waste 1.03 %. Keywords: cylinder type, field test, rasping machine, sago processing, starch percentage

Acceptability of ice cream products of red fruit (Pandanus conoideus lamk) with sago flour subtitution (Metroxylon sagu rottb)

Ice cream is a frozen food product that is processed through a combination of freezing processes in a mixture of various ingredients consisting of milk or milk products, sweeteners, emulsifiers, stabilizers, and flavor enhancers. The addition of ice cream with local Papuan food modifications, namely red fruit and sago flour, is expected to add nutrition and become a new innovation for local ice cream products in the City of Sorong, West Papua. The purpose of this study was to determine the acceptability of the red fruit ice cream product with sago flour substitution. The research design used was experimental research. The samples used as objects were ice cream products with the addition of red fruit juice and sago flour with 3 variations (S00, S20, S30). This study used a fairly trained panel of 25 people. The independent variable is the variety of ice cream with red fruit juice and sago flour substitution and the dependent variable is acceptance (taste, aroma, color, texture). The instrument used in this study was the hedonic test form. Acceptability analysis using the Friedman Test. The results showed that there were significant differences in taste (p-value 0.006), aroma (p-value 0.006), color (p-value 0.001), and texture (p-value 0.010) of ice cream products with the addition of red fruit juice and Sago flour. This study found that there were differences in the acceptance of ice cream with variations in the substitution of sago flour and red fruit.

Starch Based Biocomposite from Sago (Metroxylon sagu) with Nano-Chitosan reinforcement : Mechanical and Thermal Characteristics

A biocomposite system incorporating sago starch and nano-chitosan (SS/NCS) were developed by casting and solvent evaporation method. The purpose of this experiment for characterization of the film based on sago starch (SS) with a variation of the addition of nano-chitosan (0, 2, 4, 6 and 8% by weight starch) and analyze its effect on mechanical properties, thermal properties, and morphological characteristics of mixed film (SS / NCS). Possible intermolecular interactions between SS and NCS were confirmed by Fourier-transform infrared spectroscopy (FTIR) and the reduction of crystallinity in XRD. The experimental data showed that the incorporation of nano-chitosan resulted in an increase in film solubility, tensile strength and elongation at break and a decrease in Young’s modulus. Elongation at break of the (SS/NCS) films increased with increasing of nano-chitosan concentration. The water vapor permeability (WVP) of (SS/NCS) films increased with an increase of chitosan concentration and the same tendency observed for the moisture content. Based on thermogravimetric analysis (TGA), the percentage of nano-chitosan content in starch-based films can increase thermal stability.. Scanning electron microscope (SEM) shows the surface morphology and interface of NCS/SS composite films and suggests sufficient homogenization of starch and chitosan in biodegradable composite films.

Green Synthesis and Characterization of Amine‐Modified Starch Nanoparticles

AbstractIn this study, amine‐modified starch (AMS) nanoparticles are prepared from native sago starch (Metroxylon sagu) through a facile, economical, and aqueous‐based approach. Dialdehyde starch is initially synthesized by reacting sago starch with sodium periodate and followed by the addition of ethylenediamine for the preparation of AMS. The percentage of amine content and degree of substitution of AMS is determined by back‐titration technique. The degree of substitution of AMS is determined to be within the range of 0.9973 to 0.9984, respectively. Subsequently, AMS nanoparticles with mean particle diameters ranged between 170 and 280 nm are obtained by controlled precipitation through the drop‐wise addition of AMS solution into excess ethanol solution. The mean particle sizes of AMS nanoparticles are observed to be affected by the synthesis parameters including the ratio of solvent and non‐solvent system.

Sago palm (Metroxylon sagu Rottb.) response to drought condition in terms of leaf gas exchange and chlorophyll a fluorescence

ABSTRACT Sago palm (Metroxylon sagu Rottb.) photosynthetic performance was evaluated under drought conditions through leaf gas exchange and chlorophyll a fluorescence measurement. Drought has an impact on sago palm’s leaf gas exchange parameters and its chlorophyll fluorescence of PSII. Stomatal limitations were found to be the main factor limiting photosynthetic activities of sago palm under drought conditions. Photosynthetic rate decreased following the inhibition in the PSII reaction center. Early detection of interference upon the efficiency of the PSII reaction center due to drought stress was recorded by chlorophyll a fluorescence measurement.

DNA barcode of Metroxylon sagu and others palm species using matK gene

Abstract. Abbas B, Kabes RJ, Mawikere NL, Ruimassa RMR, Maturbong RA. 2020. DNA barcode of Metroxylon sagu and other palm species using matK gene. Biodiversitas 21: 4047-4057. Palm family encompasses numerous species, and they disperse broadly across tropical and subtropical countries. The palm family is generally used as an ornamental plant, food, oil, and industrial raw materials. Species of palm that accumulate large amount carbohydrate in the trunk is sago palm (Metroxylon sagu Rottb). The objectives of this study were to explore the plastid sequence associated with matK genes in the palm family and to reveal DNA barcode of 16 genera and 28 species of the palm. Plant materials used in the studies were derived from Sago Research Center (SRC), and other palm sequences were retrieved from the GenBank, NCBI accessions. The PCR product was sequenced by the 1st Base Asia, Singapore. Sequences of the matK gene that were observed in the plastid genome of M. sagu were registered into the NCBI GenBank as DNA barcode of M. sagu. Percent query cover of Blast analysis range from 98% to 100%, and identity range from 97.70% to 100%. Plastid nucleotides associated with matK genes in the chloroplast genome of palm family were shown substantial differences in inter-genera and small differences in inter-species. Genetic distance among palm family range from 0 to 0.026 with nucleotide variation observed was of 0.008822 value. The result of molecular phylogenetic analysis showed that the palm family separated into three clades and three sub-clades based on the plastid matK gene. Species of M. sagu and M. warburgii were considered closely related as compared to other palm species. The matK gene barcoding method is one powerful tool for identification inter-genera and inter-species of the palm.

Organellar genome copy number variations and integrity across different organs, growth stages, phenotypes and main localities of sago palm (Metroxylon sagu Rottboll) in Sarawak, Malaysia

The sago palm (Metroxylon sagu Rottboll) is one valuable food crop that has both high economic and nature value with promising potential to curb future global hunger issues. The organellar genomes, namely mitogenome and plastome, are indispensable in various development processes of plants, orchestrating the survivability and adaptability of the host and fulfilling its physiological needs. The long-PCR and qPCR approaches were used in couple to reveal the organellar genome copy number variations across different organs, growth stages, phenotypes and main localities in Sarawak, Malaysia. In this study, the mature leaf achieved among the highest unimpeded plastome and mitogenome copy number among other organs such as young root, mature root, young shoot, aged leaf and pneumatophore. The Plawei Manit stage scored the highest in terms of unimpeded mitogenome and plastome copy number across other four growth stages. The non-trunking and spiny phenotypes inspected have lower organellar genome copy numbers than the trunking phenotype. All three phenotypes sampled from four different localities in Sarawak, Malaysia showed no significant difference. This study serves as a steppingstone in unravelling the organellar genome copy number variations of sago palm and this knowledge is essential for future genotyping studies.