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Seed Germination and Seedling Emergence of Indian jointvetch (Aeschynomene indica L.) in Different Conditions

자귀풀 종자의 발아 및 출아에 미치는 환경요인

  • Jin, Chang Hao (Department of Agronomy, College of Agriculture and Life Science, Chungnam National University) ;
  • Uddin, Md. Romij (Department of Agronomy, College of Agriculture and Life Science, Chungnam National University) ;
  • Pyon, Jong-Yeong (Department of Agronomy, College of Agriculture and Life Science, Chungnam National University)
  • 김창호 (충남대학교 농업생명과학대학 식물자원학부) ;
  • 로미즈 우딘 (충남대학교 농업생명과학대학 식물자원학부) ;
  • 변종영 (충남대학교 농업생명과학대학 식물자원학부)
  • Received : 2010.01.08
  • Accepted : 2010.03.12
  • Published : 2010.03.31

Abstract

Several experiments were conducted in growth chambers and a greenhouse to determine the influence of various environmental factors on seed germination and seedling emergence of Indian jointvetch. Fully matured seeds of Indian jointvetch germinated only 42%. The germination percent increased as the storage temperature increased with time. More than 90% seeds germinated when the seeds were kept at $40^{\circ}C$ for seven months, but germination was 58.9 and 55.1% when kept at 25 and $4^{\circ}C$, respectively. Non-dormant seeds of Indian jointvetch germinated 91.1 and 92.4% at 30 and $30/25^{\circ}C$, respectively. Germination percent increased with increasing both prethermal temperature and time. The prethermal temperature of $90^{\circ}C$ for 40 minutes was the best for maximum germination (94.5%). Germination and growth of Indian jointvetch tended to decrease slightly until -0.3 MPa osmotic potential (water stress induction) and then declined drastically and the seeds did not germinate at below -0.5 MPa osmotic potential. Indian jointvetch seems to grow well in moist and flooding conditions since emergence and growth of seedling increased with increasing soil moisture content and the water level.

여러 환경요인이 자귀풀의 발아 및 출아에 미치는 영향을 생장상과 온실에서 조사하였다. 성숙된 자귀풀 종자의 발아율은 42%로 낮았으나 저장기간이 길어짐에 따라 발아율이 증가하였다. $40^{\circ}C$ 온도조건에서 7개월간 종자를 보관하였을 때는 90% 이상 발아율이 증가되었으나 $25^{\circ}C$$4^{\circ}C$에서는 각각 58.9%와 55.1%로 낮게 발아되었다. 휴면 각성된 자귀풀 종자는 $30^{\circ}C$ 항온에서는 91.1% 발아되었고, $30/25^{\circ}C$ 변온에서는 92.4% 발아되었다. $90^{\circ}C$ 고온에서 40분간 전처리한 경우에는 발아율이 94.5%로 가장 높았다. 삼투포텐셜 조절에 의하여 수분스트레스를 유기하였을 때 -0.3 MPa까지는 자귀풀의 발아와 초기 생장은 완만하게 감소되었으나 그 이하 수준으로 낮아질수록 크게 감소되어 -0.6 MPa에서는 전혀 발아되지 않았다. 자귀풀은 포장용수량이 높거나 담수상태 조건에서, 그리고 수심이 깊을수록 초기 생장량이 높은 것으로 미루어 습윤한 밭 조건이나 담수상태의 논에서 잘 생육하는 것으로 사료된다.

Keywords

References

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