Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Effect of Simulated Acid Rain on Germination, Growth, Acid Buffering Capacity and Nutrient Leaching in Impatiens balsamina L. and Tagetes patula L.

산성비가 봉선화(Impatiens balsamina L.) 및 만수국(Tagetes patula L.)의 발아, 생장, 완충능력 및 양료용탈에 미치는 영향

  • 김학윤 (경북대학교 농업과학기술연구소) ;
  • 이인중 (경북대학교 농과대학 농학과) ;
  • 신동현 (경북대학교 농과대학 농학과) ;
  • 김길웅 (경북대학교 농과대학 농학과) ;
  • 조문수 (대구대학교 자연자원대학 원예학과)
  • Published : 2000.12.01
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Abstract

This study was conducted to investigate the effect of simulated acid rain (SAR) on germination, growth, acid buffering capacity and nutrient leaching in Impatiens balsamina L. and Tagetes patula L.. In both species, germination was not inhibited at pH 4.0, but the germination rate decreased at the lower pH of 3.0, showing higher rate in Inpatiens balsamina L. than Tagetes patula L.. As the pH decreases, the growth of radicle was markedly decreased than that of hypocotyl in both species. The plant height, root length, leaf area, total dry weight, relative growth rate and net assimilation rate were inhibited by SAR. The acid buffering capacity in the leaves were increased at pH 4.0, on the other hand, it was shown a tendency to decrease at pH 2.0 in both species. As the pH levels decreased from 5.6 to 2.0, the nutrient leaching from leaves was significantly increased in both species. Based on the results, there are a great difference in the responses to SAR between the two species. In general, Tagetes patula L. represented a higher tolerance to SAR than Impatiens balsamina L.. These results suggested that interspecific variation in the acid buffering capacity and nutrient leaching from leaves may be responsible for the interspecific susceptibility to SAR.

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