• Title/Summary/Keyword: agricultural resources

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Effects of Supplementary Composts on Microbial Communities and Rice Productivity in Cold Water Paddy Fields

  • Xie, Kaizhi;Xu, Peizhi;Yang, Shaohai;Lu, Yusheng;Jiang, Ruiping;Gu, Wenjie;Li, Wenying;Sun, Lili
    • Journal of Microbiology and Biotechnology
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    • v.25 no.5
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    • pp.569-578
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    • 2015
  • Cold water paddy field soils are relatively unproductive, but can be ameliorated by supplementing with inorganic fertilizer from animal waste-based composts. The yield of two rice cultivars was significantly raised by providing either chicken manure or cow dung-based compost. The application of these composts raised the soil pH as well as both the total nitrogen and ammonium nitrogen content, which improved the soil's fertility and raised its nitrification potential. The composts had a measurable effect on the abundance of nitrogencycling-related soil microbes, as measured by estimating the copy number of various bacterial and archaeal genes using quantitative real-time PCR. The abundance of ammonia oxidizing archaea and bacteria was markedly encouraged by the application of chicken manure-based compost. Supplementation with the composts helped promote the availability of soil nitrogen in the cold water paddy field, thereby improving the soil's productivity and increasing the yield of the rice crop.

Characteristics and functions of shaker like potassium channels in rice (벼 shaker like potassium channel들의 특성과 기능)

  • Hwang, Hyun-Sik;Kim, Hyun-Mi;Jeong, Min-A;Kim, Dong-Hern;Byun, Myung-Ok;Kim, Beom-Gi
    • Journal of Plant Biotechnology
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    • v.37 no.4
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    • pp.539-548
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    • 2010
  • Potassium ($K^+$) is one of the most abundant cations in higher plant. It comprises about 10% of plant dry weight and it plays roles in numerous functions such as osmo- and turgor regulation, charge balance of plasma membrane and control of stomata and organ movement. Several potassium transporters and potassium channels regulate $K^+$ homeostasis in response to $K^+$ uptake systems. In this review, we describe the biological, biochemical and physiological characteristics of shaker like potassium channels in higher plant. Especially, we searched the rice genome databases and analysized expressed genes, genome structures and protein domain characteristics of shaker like potassium channels.

Promoted Growth of Maize by the Phosphate Solubilizing Bacteria Isolated from North-east China

  • Wu, Hai-Yan;Wang, Li-Chun;Gao, Xing-Ai;Jin, Rong-De;Fan, Zuo-Wei;Kim, Kil-Yong;Zhao, Lan-Po
    • Korean Journal of Soil Science and Fertilizer
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    • v.44 no.1
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    • pp.112-117
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    • 2011
  • A strain of phosphate solubilizing bacterium was isolated from rhizosphere and identified as Burkholderia sp. by 16S-rRNA gene sequence analyses. The bacterium was found to release gluconic acid and the solubilization of hydroxyapatite in the liquid medium by a significant drop in pH to 3.7 from an initial pH 7.0. The soluble-P concentration continuously increased during the incubation periods and the total amount of soluble P released in culture filtrate was detected at 990 mg $L^{-1}$ after 10 days of inoculation. Most promoted maize growth was found in the standard NPK (240-120-120 kg $ha^{-1}$) soil inoculation with Burkholderia sp. (Twenty milliliters/plant, 106 CFU) and also in the absence of Burkholderia sp. inoculation, the soil amended with only 2/3 levels of P gave significant higher plant yield compared to 1/3 levels of P or without P supplementation.

Draft Genome Sequence of Xylaria grammica EL000614, a Strain Producing Grammicin, a Potent Nematicidal Compound

  • Park, Sook-Young;Jeon, Jongbum;Kim, Jung A;Jeon, Mi Jin;Yu, Nan Hee;Kim, Seulbi;Park, Ae Ran;Kim, Jin-Cheol;Lee, Yerim;Kim, Youngmin;Choi, Eu Ddeum;Jeong, Min-Hye;Lee, Yong-Hwan;Kim, Soonok
    • Mycobiology
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    • v.49 no.3
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    • pp.294-296
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    • 2021
  • An endolichenic fungus, Xylaria grammica strain EL000614, showed strong nematicidal effects against plant pathogenic nematode, Meloidogyne incognita by producing grammicin. We report genome assembly of X. grammica EL000614 comprised of 25 scaffolds with a total length of 54.73 Mb, N50 of 4.60 Mb, and 99.8% of BUSCO completeness. GC contents of this genome were 44.02%. Gene families associated with biosynthesis of secondary metabolites or regulatory proteins were identified out of 13,730 gene models predicted.