The Korean Journal of Ecology

The Ecological Society of Korea (한국생태학회)
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Germination Responses of Cassia mimosoides var nomame Seeds to Temperature

온도에 대한 차풀(Cassia mimosoides var nomame)종자의 발아 반응

  • Lee, Ho-Joon (Department of Biology, Callege of Science, Kon-Kuk University) ;
  • Ji-Seok Suh (Department of Biology, Callege of Science, Kon-Kuk University) ;
  • Young-Jin Yoon (Department of Biology, Callege of Science, Kon-Kuk University) ;
  • Ung-Kyu Lim (Department of Agricultural Biology, Seoul National University)
  • Published : 1996.06.01
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Abstract

The germination responses of Cassia mimosoides var. nomame seeds to temperature were examined under various conditions. The temperature range allowing germination was $20~40^{\circ}C$, and the linear relationship between the germination rate and temperature appeared to exist between $28~38^{\circ}C$ The total thermal time required for germination (10~80%) of C. mimosoides seeds ranged from 259 Kh (degree Kelvin$\times$hours) to 421 Kh and base temperature range was relatively constant, i.e., $23.39~26.68^{\circ}C$. In the increasing temperature (IT) regime, C. mimosoides seeds started to germinate at $16^{\circ}C$ and showed greater germination rate with increasing temperatures. The final germination rate was 64% at $36^{\circ}C$. On the other hand, in the decreasing temperature (DT) regime, the seeds began to germinate at $36^{\circ}C$, and the final germination rate was 52% at $20^{\circ}C$. An induced dormancy occurred at $16^{\circ}C$ in the DT regime.

Keywords

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