• 제목/요약/키워드: Plant development

검색결과 8,559건 처리시간 0.035초

Expression of BrD1, a Plant Defensin from Brassica rapa, Confers Resistance against Brown Planthopper (Nilaparvata lugens) in Transgenic Rices

  • Choi, Man-Soo;Kim, Yul-Ho;Park, Hyang-Mi;Seo, Bo-Yoon;Jung, Jin-Kyo;Kim, Sun-Tae;Kim, Min-Chul;Shin, Dong-Bum;Yun, Hong-Tai;Choi, Im-Soo;Kim, Chung-Kon;Lee, Jang-Yong
    • Molecules and Cells
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    • 제28권2호
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    • pp.131-137
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    • 2009
  • Plant defensins are small (5-10 kDa) basic peptides thought to be an important component of the defense pathway against fungal and/or bacterial pathogens. To understand the role of plant defensins in protecting plants against the brown planthopper, a type of insect herbivore, we isolated the Brassica rapa Defensin 1 (BrD1) gene and introduced it into rice (Oryza sativa L.) to produce stable transgenic plants. The BrD1 protein is homologous to other plant defensins and contains both an N-terminal endoplasmic reticulum signal sequence and a defensin domain, which are highly conserved in all plant defensins. Based on a phylogenetic analysis of the defensin domain of various plant defensins, we established that BrD1 belongs to a distinct subgroup of plant defensins. Relative to the wild type, transgenic rices expressing BrD1 exhibit strong resistance to brown planthopper nymphs and female adults. These results suggest that BrD1 exhibits insecticidal activity, and might be useful for developing cereal crop plants resistant to sap-sucking insects, such as the brown planthopper.

2004년 주요 농작물 병해 발생개황 (Review of Disease Incidence of Major Crops of the South Korea in 2004)

  • 명인식;박경석;홍성기;박진우;심홍식;이영기;이상엽;이승돈;이수헌;최홍수;최효원;허성기;신동범
    • 식물병연구
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    • 제11권2호
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    • pp.89-92
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    • 2005
  • 2004년은 전년에 비해 기온이 높았고 강수량이 적었다. 벼 못자리 병, 잎도열병 발생 필지, 잎집무늬마름병, 흰잎마름병과 고추 역병, 탄저병 및 바이러스병, 시설참외의 급성 시들음 증상, 흰가루병 등이 2003년에 비해 증가하였다. 특히 벼잎집무늬마름병과 흰잎마름병은 전년에 비해 2배 이상 병 발생이 증가하였다. 벼 이삭도열병이 전년 $3\%$에서 2004년 $0.7\%$로 감소된 것은 출수기 동안 평균기온은 높았으나 강수일수, 강수량 및 습도가 낮아 잎도열병균이 이삭으로의 전파를 억제한 것으로 추정되었다. 고추역병은 전년에 비해 크게 감소되었다. 그리고 발표하지 않은 다른 병에 의한 피해는 다소 감소 혹은 유사한 수준이었다.

Effect of Sowing Date and Plant Density on Yield of Rapeseed in Autumn Sowing

  • Kwon Byung-Sun;Choi Seung-Sun;Lim Jung-Mook;Choi Gab-Lim;Kim Sang-Kon
    • Plant Resources
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    • 제8권3호
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    • pp.258-262
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    • 2005
  • In autumn, to determine the optimal planting date and plant density of rapeseed in southern areas of Korea, Yudal variety for autumn sowing, the highest yielding variety was grown under three different planting dates and five different plant densities. Yield components such as plant height, ear length, number of seedling stand per $m^2$, number of branches and pod length were highest at the plots with Sep. 30 of planting date and 30/20 cm drilling of plant density. Yield of seed, oil and 1,000 grains weight were highest at the Sep.30 of planting date and 30/20 cm drilling of plant density. Judging from the results reported above, at optimum planting date and plant density of rapeseed seemed to be Sep.30 of planting date and 30/20cm plant density in autumn sowing.

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The WRKY Superfamily of Rice Transcription Factors

  • Jang, Ji-Young;Choi, Chang-Hyun;Hwang, Duk-Ju
    • The Plant Pathology Journal
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    • 제26권2호
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    • pp.110-114
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    • 2010
  • WRKY transcription factors are known to be involved in many different biological processes including plant response to biotic stress, abiotic stress, and plant development. WRKY proteins are extensively studied in Arabidopsis. Recently, reports on WRKY proteins are rapidly increasing in the other plant species, especially in rice. Therefore, this review will discuss the function of rice WRKY proteins reported so far.