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http://dx.doi.org/10.5141/JEFB.2004.27.3.147

Differences in Growth and Photosynthesis among Three Half-sib Families of Betula schmidtii in Response to Cd Treatment  

오창영 (국립산림과학원 산림유전자원부)
이경준 (서울대학교 산림자원학)
이재천 (국립산림과학원 산림유전자원)
한심희 (서울대학교 산림자원학과)
Publication Information
The Korean Journal of Ecology / v.27, no.3, 2004 , pp. 147-153 More about this Journal
Abstract
The objective of this study was to understand differences among three half-sib families of Betula schmidtii seedlings in the effect of three Cd levels on growth and photosynthesis. One-year-old seedlings of B. schmidtii were treated with 0, 0.4 and 0.8 mM CdSO$_4$ㆍ8/3$H_2O$ for two months. Growth and physiological responses to Cd treatment levels of three families determined using dry weight, relative height growth rate(RHGR), apparent quantum yield and carboxylation efficiency. The B. schmidtii seedlings exposed to 0.4 and 0.8 mM Cd showed statisticall significant decrease in dry weight and RHGR relative to controls. In addition, the growth inhibition of B. schmidtii seedlings was accompanied by a significant decrease in net photosynthesis measured as $CO_2$ assimilation. Apparent quantum yield and carboxylation efficiency were also affected by Cd treatment, undergoing a significant and progressive reduction with increasing Cd concentrations in all families. We also found significant difference among three families of B. schmidtii in growth, biomass and photosynthesis when exposed to Cd stress. Therefore the present study showed that the difference in Cd tolerance among families might be attributed to genetic factor in response to Cd stress.
Keywords
Apparent quantum yield; Betula schmidtii; Carboxylation efficiency; Relative height growth rate;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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