Differential expression of rice lipid transfer protein gene(LTP) classes in response to abscisic acid, salt, salicylic acid, and the fungal pathogenMagnaporthe grisea

Abstract

Rice lipid transfer protein(LTP) genes belong to a complex multigene family and are differentially regulated. The organ specificity of expression for the different classes of riceLTP gene Subfamily I was investigated here.LTPC1 (Class I) was highly expressed in flowers and stems, whileLTPC2 (Class II) showed higher expression in leaves and stems.LTPC3 (Class III) showed higher expression in stems, whereas corresponding mRNA was barely detected in leaves. Treatment of 3-wk-old plants with ABA induced the expression ofLTPC1 andLTPC3 after 1 d. Expression of all threeLTP isoforms was induced in response to salicylic acid. Because some of these genes are reportedly induced by pathogens, we also investigated whether they might be responsive to infection byMagnaporthe grisea. Transcripts ofLTPC1 started to accumulate in the leaves at 8 h after incompatible inoculation, reaching a maximum level at 48 h. In contrast, the response was much slower and weaker after compatible inoculation.

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Correspondence to Tae Hyun Kim or Moon Chul Kim or Jong Ho Park or Seong Sook Han or Byung Ryun Kim or Byoung Yong Moon or Mi Chung Suh or Sung Ho Cho.

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Kim, T.H., Kim, M.C., Park, J.H. et al. Differential expression of rice lipid transfer protein gene(LTP) classes in response to abscisic acid, salt, salicylic acid, and the fungal pathogenMagnaporthe grisea . J. Plant Biol. 49, 371 (2006). https://doi.org/10.1007/BF03178814

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Keywords

  • lipid transfer protein
  • Magnaporthe grisea
  • pathogen
  • rice
  • stress