Low temperature stress at the seedling stage of rice is an important factor causing the leaf discoloration, wilting and consequently leads to non-uniform crop maturation. In order to screen the cold tolerance elite lines efficiently, the five cold treatment conditions with different water and air temperature were designed and treated at seedling stage. For the evaluation of seedling tolerance, the injury was scored by visual rate and measured by Soil and Plant Analyzer Development (SPAD) meter. In the reactions of varieties for each treatment, the treatment ‘B’ condition, 12ºC mean water with 24ºC mean air, shows clear discoloration, so it’s correlation coefficient was highest (r=−0.9, P<0.0001) among the treatments. In the treatment condition for screening the cold-tolerance elite line, the cultivar, treatment and their interaction significantly affect the SPAD value. The ‘A’ treatment, 12ºC mean water with 34ºC mean air, was the best way to observe the variation between the elite lines. On the basis of the Duncan’s test for SPAD value of cultivars, Keumo (moderate tolerant), Saetbyeol (sensitive) and Seolak (tolerant) were selected as check varieties. To study its impacts at the paddy field, the changes of crop characteristics such as height, panicle length, number of tiller and heading were investigated. In later growth period, the seedling treatment impact at the paddy field leads to heading delay. Due to the low temperature stress at the seedling stage induced by 12ºC mean cold water, Japonica and Tongil group shows the heading delay 4 to 7 and 8 to 11 days respectively.

Citations

Citations to this article as recorded by  

• Genome-wide Association Study for Cold Tolerance at Seedling Stage Using a Core Collection of Korean Rice
  Sa-Eun Park, Ngoc Ha Luong, Sang-Nag Ahn, Kyu-Chan Shim
  Journal of Agriculture & Life Science.2025; 59(2): 13.     CrossRef
• Identification of QTLs Related to Plant Growth at Low Temperatures in the Seedling Stage of Tongil Type Rice after Transplanting
  Seong-Gyu Jang, Ji-Yoon Lee, Ju-Won Kang, Youngho Kwon, So-Myeong Lee, Sais-Beul Lee, Jun-Hyeon Cho, Dong-Soo Park, Jong-Hee Lee, Soon-Wook Kwon, Sumin Jo
  Korean Journal of Breeding Science.2024; 56(3): 225.     CrossRef
• Haplotype analysis of Tongil-type rice varieties through sequence polymorphism analysis of cold tolerance-enhancing genes
  Youngeun Lee, Sais-Beul Lee, Ju-Won Kang, Jun-Hyeon Cho, Dong-Soo Park, Jong-Hee Lee, Dongjin Shin, Byung Jun Jin
  Journal of Plant Biotechnology.2024;[Epub]     CrossRef
• Temporal Changes of Leaf Spectral Properties and Rapid Chlorophyll—A Fluorescence under Natural Cold Stress in Rice Seedlings
  Árpád Székely, Tímea Szalóki, Mihály Jancsó, János Pauk, Csaba Lantos
  Plants.2023; 12(13): 2415.     CrossRef
• Efficient Cold Tolerance Evaluation of Four Species of Liliaceae Plants through Cell Death Measurement and Lethal Temperature Prediction
  Woo-Hyeong Yang, Seong-Hyeon Yong, Dong-Jin Park, Sung-Jin Ahn, Do-Hyun Kim, Kwan-Been Park, Eon-Ju Jin, Myung-Suk Choi
  Horticulturae.2023; 9(7): 751.     CrossRef