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Citation:

Establishment of Cell Suspension Culture and Growth Characteristics of Wild Nitraria tangutorum

  • Received Date: 2014-08-26
  • Taking stems and leaves of wild Nitraria tangutorum Bobr. as explants to study the disinfectant effects by NaClO on explants and the effects of 2,4-D, NAA and 6-BA on callus induction and morphology. The callus morphology was analyzed and cell suspension systems were established with the loose type callus, its growth characteristics were observed. The results show that the best way of disinfection of explants was 10 minutes with NaClO, the longer or shorter the sterilization time, the lower the survival rate. Three hormones had effects on relative growth and morphology of callus and the 2,4-D was a major factor, the relative growth rate of callus from stem was higher than that of leaves. To be confirmed by callus growth rate and morphological characteristics, cultured on MS medium containing 2,4-D 1.5 mg·L-1, NAA 0.2 mg·L-1 and 6-BA 0.4 mg·L-1 was the optimum treatment combination for the establishment of N. tangutorum suspension cell lines. The calluses were loose type with light yellow, and the best inoculation dosage was 7.5 mL mother liquor. Under such condition, the cells grew in an 'S' curve. The cell mitotic index reached the maximum value of 5.1% at the seventh day, at the third day of cultured the cell got the strongest activity and the light absorption value was 0.69. The survival rate in the lag phase and stationary phase decreased slightly faster than logarithmic phase, but maintained between 84%-93%.
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Establishment of Cell Suspension Culture and Growth Characteristics of Wild Nitraria tangutorum

  • 1. Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
  • 2. Research Center of Saline and Alkali Land of State Forestry Administration, Beijing 100091, China
  • 3. Guangdong Academy of Forestry, Guangzhou 510520, Guangdong, China

Abstract: Taking stems and leaves of wild Nitraria tangutorum Bobr. as explants to study the disinfectant effects by NaClO on explants and the effects of 2,4-D, NAA and 6-BA on callus induction and morphology. The callus morphology was analyzed and cell suspension systems were established with the loose type callus, its growth characteristics were observed. The results show that the best way of disinfection of explants was 10 minutes with NaClO, the longer or shorter the sterilization time, the lower the survival rate. Three hormones had effects on relative growth and morphology of callus and the 2,4-D was a major factor, the relative growth rate of callus from stem was higher than that of leaves. To be confirmed by callus growth rate and morphological characteristics, cultured on MS medium containing 2,4-D 1.5 mg·L-1, NAA 0.2 mg·L-1 and 6-BA 0.4 mg·L-1 was the optimum treatment combination for the establishment of N. tangutorum suspension cell lines. The calluses were loose type with light yellow, and the best inoculation dosage was 7.5 mL mother liquor. Under such condition, the cells grew in an 'S' curve. The cell mitotic index reached the maximum value of 5.1% at the seventh day, at the third day of cultured the cell got the strongest activity and the light absorption value was 0.69. The survival rate in the lag phase and stationary phase decreased slightly faster than logarithmic phase, but maintained between 84%-93%.

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