Effect of enhanced CaCl₂, MgSO₄, and KH₂PO₄ on improved in vitro growth of potato

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  • Lekamge Deepchandi
    Department of Civil and Environmental Engineering, Nagaoka University of Technology
  • Sasahara Tomoki
    Department of Civil and Environmental Engineering, Nagaoka University of Technology
  • Yamamoto Shin-ichi
    Genetic Resources Center, National Agriculture and Food Research Organization
  • Hatamoto Masashi
    Department of Civil and Environmental Engineering, Nagaoka University of Technology
  • Yamaguchi Takashi
    Department of Science of Technology Innovation, Nagaoka University of Technology
  • Maki Shinya
    Department of Science of Technology Innovation, Nagaoka University of Technology

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タイトル別名
  • Effect of enhanced CaCl<sub>2</sub>, MgSO<sub>4</sub>, and KH<sub>2</sub>PO<sub>4</sub> on improved in vitro growth of potato

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<p>Potato (Solanum tuberosum L.) is a major global food crop. Contemporary potato production largely utilizes micropropagation to produce healthy seed potatoes. The micropropagation of potatoes is widely achieved through nodal explants using the conventional Murashige and Skoog (MS) medium. Currently, effective culture media that can facilitate rapid propagation are increasingly required for new cultivars that have been developed to possess improved traits. In this study, we evaluated the effect of enhanced meso nutrients (CaCl2.2H2O, MgSO4, and KH2PO4) in MS medium on the growth of S. tuberosum. The cultivars used in this study were representative of Japanese, European, and Peruvian lines. Enhanced meso nutrients improved the overall quality of all cultivars, as indicated by longer shoots and larger leaves with dark color, compared with MS medium only. Shoots grown on enhanced mesos were approximately 1.5 times longer than on MS medium. Quantitative ion analysis revealed that plantlets with improved shoot length and leaf quality in most cultivars had increased calcium, magnesium, potassium, and phosphorus uptake than plantlets on MS medium. The results suggest that the reduced iron uptake on 3.0×MS, compared with 2.0× or 2.5×MS mesos, reduced plant growth. This study revealed for the first time that mesos concentrations higher than MS medium concentrations, complemented by enhanced calcium, magnesium, potassium, phosphorus, and iron uptake, play a significant role in improving the in vitro growth of potato.</p>

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