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Rahman, Md. Atikur,Lee, Sang-Hoon,Song, Yowook,Ji, Hee Jung,Kim, Ki-Yong,Choi, Gi Jun,Lee, Ki-Won The Korean Society of Grassland and Forage Science 2019 한국초지조사료학회지 Vol.39 No.3
Salicylic acid (SA) is an essential plant growth regulator that functions as a signaling molecule in plants. The purpose of this study was to clarify how the exogenous application of SA counteracts aluminum stress-induced growth and biomass yield reduction in alfalfa exposed to aluminum (Al) stress. Two-week-old alfalfa seedlings were exposed to a combination of $AlCl_3$ ($0{\mu}M$, $50{\mu}M$ and $100{\mu}M$, respectively) and SA (0.1 mM) for 72 hours. We observed, Al stress-induced plant growth inhibition and forage yield reduction are Al stress-dependent manner. A significant reduction of plant height (42.0-52.9%), leaf relative water content (13.0-21.4%), root length (35.4-48.7%), shoot fresh weight (31.2-25.9%), root fresh weight (15.4-23.3%), shoot dry weight (12.7-22.2%), roots dry weight (47.3-53.5%), were observed in alfalfa. In contrast, SA alleviated the Al-stress and enhanced growth and biomass yield in alfalfa. This study provides useful information concerning the role of SA that counteracts aluminum stress-induced growth and yield reduction in alfalfa.
Taxonomic Revision of Subfamily Achilinae (Hemiptera: Achilidae) from Korea
Rahman, Mohammad Atikur,Kwon, Yong Jung,Su, Sang Jae Institute of Agricultural Science and Technology 2014 慶北大農學誌 Vol.32 No.4
The planthopper subfamily Achilinae (Metcalf, 1938) from Korea is taxonomically revised. Six genera and seven species are recorded among Korean fauna. Among them, one genus, Phenelia Kirkaldy, and two species, Phenelia striatella (Matsumura, 1914) and Deferunda qiana Chen and He (2010) are new to Korea. The male genital structures of all these species are described and illustrated, plus an identification key to the tribe, genus, and species is provided.
Arsenic-Induced Differentially Expressed Genes Identified in Medicago sativa L. roots
Rahman, Md. Atikur,Lee, Sang-Hoon,Kim, Ki-Yong,Park, Hyung Soo,Hwang, Tae Young,Choi, Gi Jun,Lee, Ki-Won The Korean Society of Grassland and Forage Science 2016 한국초지조사료학회지 Vol.36 No.3
Arsenic (As) is a toxic element that easily taken up by plants root. Several toxic forms of As disrupt plant metabolism by a series of cellular alterations. In this study, we applied annealing control primer (ACP)-based reverse transcriptase PCR (polymerase chain reaction) technique to identify differentially expressed genes (DEGs) in alfalfa roots in response to As stress. Two-week-old alfalfa seedlings were exposed to As treatment for 6 hours. DEGs were screened from As treated samples using the ACP-based technique. A total of six DEGs including heat shock protein, HSP 23, plastocyanin-like domain protein162, thioredoxin H-type 1 protein, protein MKS1, and NAD(P)H dehydrogenase B2 were identified in alfalfa roots under As stress. These genes have putative functions in abiotic stress homeostasis, antioxidant activity, and plant defense. These identified genes would be useful to increase As tolerance in alfalfa plants.
Rahman Md Atikur,Alam Iftekhar,Sharmin Shamima Akhtar,Kabir Ahmad Humayan,Kim Yong-Goo,Liu Gongshe,Lee Byung-Hyun 한국식물생명공학회 2021 Plant biotechnology reports Vol.15 No.6
Drought stress is one of the major constraints for soybean growth and productivity worldwide. The study was aimed to investigate drought-induced physiological and proteomic changes in soybeans, as well as drought relief using exogenous hydrogen peroxide (H2O2). In drought-stressed plants, H2O2 spray on the leaf surface improved relative water content (RWC), net photosynthetic rate (Pn), and stomatal conductance (Gs). Furthermore, exogenous H2O2 reduced drought stress-induced endogenous MDA and H2O2 levels, as well as increased the key antioxidant enzymes (SOD,CAT, APX and POD) activ- ity and proline content in H2O2-treated soybean plants. These findings showed that H2O2 treatment significantly reduced drought stress by increasing the antioxidative defense system and osmotic adjustment. Furthermore, using matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry, a total of 27 differently expressed proteins was identified, wherein 23 were up-regulated and 4 were down-regulated under drought condition. These proteins were found to be involved in photosynthesis, energy and metabolism, plant defense and antioxidant, signaling and transport, and transcription regulation in response to H2O2 treatment in soybean under drought stress, according to in silico interactome analysis. These findings add to our understanding of H2O2-mediated drought stress alleviation, as well as the physiological and molecular responses of soybean to drought stress.
Proteomic Response of Alfalfa Subjected to Aluminum (Al) Stress at Low pH Soil
Rahman, Md. Atikur,Kim, Yong-Goo,Lee, Byung-Hyun The Korean Society of Grassland and Forage Science 2014 한국초지조사료학회지 Vol.34 No.4
In order to reveal the aluminum (Al) stress tolerance mechanisms in alfalfa plant at low pH soil, a proteomic approach has been conducted. Alfalfa plants were exposed to Al stress for 5 days. The plant growth and total chlorophyll content are greatly affected by Al stress. The malondialdehyde (MDA) and $H_2O_2$ contents were increased in a low amount but free proline and soluble sugar contents, and the DPPH-radical scavenging activity were highly increased. These results indicate that antioxidant activity (DPPH activity) and osmoprotectants (proline and sugar) may involve in ROS ($H_2O_2$) homeostasis under Al stress. In proteomic analysis, over 500 protein spots were detected by 2-dimentional gel electrophoresis analysis. Total 17 Al stress-induced proteins were identified, of which 8 protein spots were up-regulated and 9 were down-regulated. The differential expression patterns of protein spots were selected and analyzed by the peptide mass fingerprinting (PMF) using MALDI-TOF MS analysis. Three protein spots corresponding to Rubisco were significantly down-regulated whereas peroxiredoxin and glutamine synthetase were up-regulated in response to Al stress. The different regulation patterns of identified proteins were involved in energy metabolism and antioxidant / ROS detoxification during Al stress in alfalfa. Taken together, these results provide new insight to understand the molecular mechanisms of alfalfa plant in terms of Al stress tolerance.
Isolation and Identification of Short Term Drought-Induced Genes in Zea mays L. Leaves
Rahman, Md. Atikur,Lee, Sang-Hoon,Choi, Gi Jun,Ji, Hee Jung,Kim, Won Ho,Lee, Ki-Won The Korean Society of Grassland and Forage Science 2017 한국초지조사료학회지 Vol.37 No.3
Drought is one of the detrimental factors that impair plant growth and productivity. In this study, we applied annealing control primer (ACP)-based reverse transcriptase PCR (polymerase chain reaction) technique to identify differentially expressed genes (DEGs) in maize leaves in response to drought stress. Two-week-old maize seedlings were exposed to drought (DT) by suspending water supply. DEGs were screened after 3 days of DT-treated samples using the ACP-based technique. Several DEGs encoding 16.9 protein, antimicrobial protein, hypothetical protein NCLIV_068840, thioredoxin M-type were identified in maize leaves under drought stress. These genes have putative functions in plant defense response, growth and development. These identified genes would be useful for predictive markers of plant defense, and growth responses under drought stress in plants.
Taxonomic Revision of Subfamily Achilinae (Hemiptera: Achilidae) from Korea
Rahman, Mohammad Atikur,Kwon, Yong Jung,Su, Sang Jae 경북대학교 농업생명과학대학 2014 Current Research on Agriculture and Life Sciences Vol.32 No.4
The planthopper subfamily Achilinae (Metcalf, 1938) from Korea is taxonomically revised. Six genera and seven species are recorded among Korean fauna. Among them, one genus, Phenelia Kirkaldy, and two species, Phenelia striatella (Matsumura, 1914) and Deferunda qiana Chen and He (2010) are new to Korea. The male genital structures of all these species are described and illustrated, plus an identification key to the tribe, genus, and species is provided.
Rahman, Md. Atikur,Lee, Sang-Hoon,Ji, Hee Chung,Kabir, Ahmad Humayan,Jones, Chris Stephen,Lee, Ki-Won MDPI 2018 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES Vol.19 No.10
<P>Aluminum (Al) toxicity is one of the major limitations that inhibit plant growth and development in acidic soils. In acidic soils (pH < 5.0), phototoxic-aluminum (Al<SUP>3+</SUP>) rapidly inhibits root growth, and subsequently affects water and nutrient uptake in plants. This review updates the existing knowledge concerning the role of mineral nutrition for alleviating Al toxicity in plants to acid soils. Here, we explored phosphorus (P) is more beneficial in plants under P-deficient, and Al toxic conditions. Exogenous P addition increased root respiration, plant growth, chlorophyll content, and dry matter yield. Calcium (Ca) amendment (liming) is effective for correcting soil acidity, and for alleviating Al toxicity. Magnesium (Mg) is able to prevent Al migration through the cytosolic plasma membrane in root tips. Sulfur (S) is recognized as a versatile element that alleviates several metals toxicity including Al. Moreover, silicon (Si), and other components such as industrial byproducts, hormones, organic acids, polyamines, biofertilizers, and biochars played promising roles for mitigating Al toxicity in plants. Furthermore, this review provides a comprehensive understanding of several new methods and low-cost effective strategies relevant to the exogenous application of mineral nutrition on Al toxicity mitigation. This information would be effective for further improvement of crop plants in acid soils.</P>
Taxonomic revision of family Tropiduchidae (Hemiptera: Fulgoromorpha) from Korea
Mohammad Atikur RAHMAN,권용정,서상재 한국곤충학회 2011 Entomological Research Vol.41 No.6
The family Tropiduchidae is revised taxonomically comprising five genera and five species from Korea. Catullia vittata Matsumura is redescribed here on the basis of a series of males recently collected in Korea. Cixiopsis punctatus Matsumura and Catullia vittata Matsumura were transferred from Achilidae to Tropiduchidae and are redescribed here with male genitalia for the first time from Korea. Ommatissus binatatus Fieber previously reported was an incorrect identification of Ommatissus lofouensis Muir. Another species, Trypetimorpha koreana Kwon and Lee, is the macropterous form of Trypetimorpha japonica Ishihara. All Korean species of the Tropiduchidae are redescribed and illustrated, and an identification key to the genera of Tropiduchidae is provided.