Faculty Profiles - EHARA Hiroshi

Papers - EHARA Hiroshi

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Identification of differentially expressed transcripts for trunk formation in sago palm using annealing control primer GeneFishing technique Reviewed

Hussain Hasnain, Edward-Atit Anastasia Shera, Julaihi Norzainizul, Tommy Rina, Nisar Mehvish, Hamdan Nurhazlina, Ehara Hiroshi

Journal of Applied Biology and Biotechnology Vol. 10 ( 2 ) page： 21 - 34 2022.2

Detection of Suitable Wetlands for Paddy Field Harvesting of Taro (Colocasia esculenta) to Minimize Damage Caused by Taro Beetles (Papuana uniondis) on Gau Island, Fiji

MIYAMOTO Kana, ITAYA Akemi, NAKASHIMA Chiharu, MISHIMA Takashi, TOKUDA Hiromi, YOSHIMATSU Takao, EHARA Hiroshi

Tropical Agriculture and Development Vol. 66 ( 2 ) page： 64 - 72 2022

Language：English Publishing type：Research paper (scientific journal) Publisher：Japanese Society for Tropical Agriculture

Taro beetle damage has recently been reported on Gau Island, Fiji, causing economic loss for the taro business. This significantly reduced farmers’ incomes and the cultural value of taro. Swamp taro cultivation is expected to be a solution to taro beetle damage. Even though studies investigating the mitigation of taro beetle damage in paddy fields are not common, taro beetles do not have the ability to go beyond a certain depth in muddy condition. This study investigated suitable wetlands for taro cultivation by using the topographic wetness index (TWI). The calculation also considered protection forest zones and accessibility as analyzed by RapidEye satellite images, normalized difference vegetation index (NDVI), and buffer function. Results showed that 26.03% of the island’s mass has potential for the development of paddy fields. Although the result was larger than predicted, there are differences between potential areas for each village. However, these areas were more than double size of the existing farmland of each village. Estimated yields corresponding to the potential areas were also presented in the study; these indicated that more than half of villages might be able to yield more than 0.50 t of taro production.

DOI： 10.11248/jsta.66.64

CiNii Research

Effect of chicken manure and chemical fertilizer on the yield and qualities of white mugwort at dissimilar harvesting times Reviewed

Ornprapa Thepsilvisut, Preuk Chutimanukul, Sudathip Sae-Tan, Hiroshi Ehara

PLOS ONE Vol. 17 ( 4 ) page： e0266190 - e0266190 2022

Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Public Library of Science (PLoS)

One of the key components that affects soil productiveness, plant growth, and crop quality is fertilization. The effect of fertilizer, both organic and chemical, on the extremely acidic (pH 4.10) sandy loam soil chemical properties, yield, and quality of white mugwort grown were evaluated in this study. The field experiment arranged in a randomized complete block design, with four replications was conducted in Prachin Buri province, Thailand. There were six treatments, no fertilization (control), chemical fertilizer (25-7-7 + 46-0-0) applied at 187.50 (66.56 N:6.77 P2O5:6.77 K2O kg ha-1) kg ha-1 and applied at 375.00 (133.12 N:13.13 P2O5:13.13 K2O kg ha-1) kg ha-1, chicken manure applied at 3.36, 6.72, and 10.08 t ha-1. After harvesting, application of chicken manure tended to increase soil organic matter compared to the control, however, the application of chemical fertilizer did not show the same effect. The fresh weight of white mugwort increased with the rise in both fertilizer levels. Chicken manure application at 10.08 t ha-1 produced the highest fresh weight at all times. The level of accumulated nitrate was significantly greater when fertilizer rates increased. In addition, the total phenolic content of the white mugwort fertilized with chicken manure was higher than that fertilized with chemical fertilizer. However, there was no association between the DPPH radical scavenging capacity at harvesting times and different fertilization. Based on the results, chicken manure applied at 10.08 t ha-1 gave the best yield and higher total phenolic content of white mugwort, which was probably due to the improved soil organic matter.

DOI： 10.1371/journal.pone.0266190

Web of Science

Scopus

PubMed

Comparison of growth and ion absorption with compatible solute accumulation of three wild Vigna species under salt stress Reviewed

Yoshida, J., Tomooka, N., Mishima, T., Matsuda, Y. and Ehara, H.

Tropical Agriculture and Development Vol. 65 ( 4 ) page： 194 - 205 2021.12

Arbuscular mycorrhizal communities in the roots of sago palm in mineral and shallow peat soils Reviewed International coauthorship International journal

Asano, K., Kagong, W. V. A., Mohammad, S. M. B., Sakazaki, K., Talip, M. S. B. H. A., Sahmat, S. S., Yok, M. C. K., Isoi, T., Nakata-Kano, M. and Ehara, H.

Agriculture Vol. 11 ( 11 ) 2021.12

Response and resilience of Asian agrifood systems to COVID-19: An assessment across twenty-five countries and four regional farming and food systems Reviewed International coauthorship International journal

John M. Dixon, Jeevika Weerahewa, Jon Hellin, Maria Fay Rola-Rubzen, Jikun Huang, Shalander Kumar, Anup Das, Muhammad Ejaz Qureshi, Timothy J. Krupnik, Kamil Shideed, Mangi L. Jat, P.V. Vara Prasad, Sudhir Yadav, Aamer Irshad, Abdybek Asanaliev, Aigul Abugalieva, Aziz Karimov, Basundhara Bhattarai, Carol Q. Balgos, Fred Benu, Hiroshi Ehara, Jharendu Pant, Jon M.P. Sarmiento, Jonathan C. Newby, Jules Pretty, Hiromi Tokuda, Horst Weyerhaeuser, Larry N. Digal, Lingling Li, Md. Abdur Rouf Sarkar, Md. Zihadul Abedin, Pepijn Schreinemachers, Quentin Grafton, Ram C. Sharma, Saidjamol Saidzoda, Santiago Lopez-Ridaura, Shuan Coffey, Suan Pheng Kam, Su Su Win, Suwanna Praneetvatakul, Tek Maraseni, Van Touch, Wei-li Liang, Yashpal Singh Saharawat, Jagadish Timsina

Agricultural Systems Vol. 193 page： 103168 - 103168 2021.10

Traditional knowledge of medicinal plants on Gau Island, Fiji: differences between sixteen villages with unique characteristics of cultural value Reviewed International coauthorship International journal

Kana Miyamoto, Hiroshi Ehara, Randolph Thaman, Joeli Veitayaki, Takehito Yoshida, Hikaru Kobayashi

Journal of Ethnobiology and Ethnomedicine page： 17 - 58 2021.10

Commercialization of sago starch in Indonesia: Production, consumption and international trading Reviewed International coauthorship International journal

Marlisa Ayu Trisia, Hiroshi Ehara

Sago Palm Vol. 29 ( 1 ) page： 39 - 47 2021.8

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

Aidil Azhar, Daigo Makihara, Hitoshi Naito, Koki Asano, Mai Takagi, Saeka Unoki, Rena Tomita, Barahima Abbas, Hiroshi Ehara

PLANT PRODUCTION SCIENCE Vol. 24 ( 1 ) page： 65 - 72 2021.1

Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：TAYLOR & FRANCIS LTD

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.[GRAPHICS].

DOI： 10.1080/1343943X.2020.1794914

Web of Science

Scopus

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

Aidil Azhar, Fitri Audia, Koki Asano, Daigo Makihara, Hitoshi Naito, Daisuke Sugiura, Hiroshi Ehara

Agrosystems, Geosciences & Environment Vol. 4 ( 3 ) 2021

The Role of the Sago Supply Chain for Rural Development in Indonesia: A Review and Perspective Reviewed International coauthorship International journal

Marlisa Ayu Trisia , Masashi Tachikawa , Hiroshi Ehara

Reviews in Agricultural Science 2021

Factors Determining Sago Starch Import Demand: Empirical Evidence from Japan Reviewed International journal

Marlisa Ayu Trisia, Hironobu Takeshita, Mayumi Kikuta, Hiroshi Ehara

Journal of International Logistics and Trade Vol. 18 ( 4 ) page： 159 - 167 2020.12

Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Jungseok Research Institute of International Logistics and Trade

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.

DOI： 10.24006/jilt.2020.18.4.159

Scopus

From producers to consumers: An analysis of distribution channels and added value of sago products in East Java, Indonesia Reviewed

Trisia, M. A, Ehara, H

Sago Palm Vol. 28 ( 2 ) page： 49 - 55 2020.12

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：The Japanese Societ of Sago Palm Studies

The distribution channel is vital in the sago business because it connects producers and consumers. In this paper, we identify the distribution channels of sago products and their functional classification. We found that the distribution of sago products, such as dried sago and roasted sago (sagu kotak), in East Java is classified as indirect distribution, which relies on intermediaries. Intermediaries such as distributors, wholesale agents, and retailers are primarily actors that directly coordinate buying, selling, storing, and distributing sago products from Riau and Maluku to consumers in East Java. In addition, our calculation showed that sago pudding has a highly profitable value-added process as compared to that of roasted sago.

DOI： 10.57418/sagopalm.28.2_49

CiNii Research

Potassium fertilizer under iron toxicity stress of ex-situ conditions and its effect to Fe content in the rice grain Reviewed International coauthorship

Saeka Unoki, Trias Sitaresmi, Hiroshi Ehara, Yudhistira Nugraha

Jurnal Penelitian Pertanian Tanaman Pangan Vol. 4 ( 2 ) page： 81 - 81 2020.8

Language：English Publishing type：Research paper (scientific journal) Publisher：Indonesian Agency For Agricultural Research and Development (IAARD)

Iron toxicity affects the growth and yield of rice plant. Overcoming the damage of rice production by iron toxicity requires furthermore researches from laboratory to field levels. Here, we study responses of rice genotypes to iron toxicity between vegetative stage in hydroponic and whole grow stages in the pot. The first experiment was hydroponic experiment using twelve rice genotypes which were growth in the Yoshida Solution with addition of 0.2 % of agar. Three level of iron was given at 0, 500 and 700 ppm. The second experiment was the pot experiment using alluvial soil added with 3.000 ppm of ferrous combine with four levels of potassium and the control on Cilamaya Muncul (tolerant), Inpara 8 (moderate tolerant) and IR 64 (susceptible). In hydroponic experiment, even though the symptom appeared obviously, the leaf bronzing score (LBS) of tolerant and sensitive genotypes were not different. Physiological traits were significantly affected by Fe treatment in all varieties. Then symptom and physiological traits were significantly correlated. Through the pot experiment, it was confirmed the tolerance of each varieties. However, we couldn’t see the correlation between the LBS on hydroponic and soil at this time. And the heading delay was new finding, but it depended on varieties. We also could see the possibility of potassium application to inhibit iron toxicity but still we need to explore how it works. Kata kunci: iron toxicity, rice, hydroponic, soil

DOI： 10.21082/jpptp.v4n2.2020.p81-88

Potential yield and nutrient requirements of direct-seeded, dry-season rice in Cambodia Reviewed International coauthorship International journal

Kong , K, Hin, S, Seng, V, Ismail, A. M, Vergara, G, Choi, I-R, Ehara, H, Kato, Y

Experimental Agriculture Vol. 56 ( 2 ) page： 255 - 264 2020.4

Importance of phosphorus and potassium in soil-specific nutrient management for wet-season rice in Cambodia. Experimental Agriculture Reviewed International coauthorship International journal

Kong, K, Hin, S, Seng, V, Ismail, A. M, Vergara, G, Choi, I-R, Ehara, H, Kato, Y

Experimental Agriculture Vol. 56 ( 2 ) page： 204 - 217 2020.4

Unique responses of three highly salt tolerant wild Vigna species against salt stress Reviewed International coauthorship International journal

Yoshida, Y, Tomooka, N, Khaing, T. Y, Shantha, P. G. S, Naito, H, Matsuda, Y, Ehara, H

Plant Production Science Vol. 23 ( 1 ) page： 114 - 128 2020.1

Evaluating sago palm (Metroxylon sagu Rottb.) photosynthetic performance in waterlogged conditions: utilizing pulse-amplitude-modulated (PAM) fluorometry as a waterlogging stress indicator Reviewed International coauthorship International journal

A. Azhar, D. Makihara, H. Naito, H. Ehara

Journal of the Saudi Society of Agricultural Sciences Vol. 19 ( 1 ) page： 37 - 42 2020

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：King Saud University

Photosynthetic performance of sago palm (Metroxylon sagu Rottb.) was evaluated in normal and waterlogged conditions. Net assimilation rate (AN), light response curve of net assimilation rate (AN/I) and pulse-amplitude modulation fluorescence vs. irradiance (PAM/I), leaf water potential, leaf chlorophyll content and leaflet area were measured. AN was higher in a particular period of waterlogging than in the normal condition. However, prolonged waterlogging (more than two months) negatively affected sago palm photosynthetic capacity. This was indicated by reduction in several photosynthetic parameters such as AN, maximum value of AN obtained at maximum irradiance (AN ( I max)), quantum yield at zero to 200 µmol m−2 s−1 irradiance (ϕ( I o_ I 200)), asymptotic photosynthetic efficiency (αo), and maximum electron transport rate (ETRmax). The plants experiencing waterlogging produced high qNmax and NPQmax values. Prolonged waterlogging period also caused significant reduction in leaf water potential (ψleaf) and photosynthetic pigments content. Normal soil conditions with a sufficient amount of water are preferable in order for the plant to generate higher photosynthetic capacity and facilitate stable sago production.

DOI： 10.1016/j.jssas.2018.05.004

Scopus

Colonization of Roots in Sago Palm Seedlings Associated with Commercial Mycorrhizal Inocula Reviewed International coauthorship

Asano, K., Isoi, Y., Murano, H., Azhar, A., Pasolon, Y. B. and Ehara, H.

Sago Palm Vol. 27 ( 1 ) page： 9-14 2020

Agro-economic evaluation of fertilizer management for wet season rice in southern Cambodia Reviewed International coauthorship

Kong, K., Kato, Y., Men, S., Seng, V., Yamauchi, A., Kikuta, M., Choi, I-R. and Ehara, H.

Tropical Agriculture and Development Vol. 64 ( 4 ) page： 210-218 2019.12

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Papers - EHARA Hiroshi