Differences on Growth, Photosynthesis and Pigment Contents of Open-pollinated Pinus densiflora Families Under Elevated Temperature and Drought

온도 증가와 건조 스트레스에 따른 소나무 풍매차대묘의 가계간 생장, 광합성 및 광색소 함량 차이

  • Kim, Gil Nam (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Han, Sim-Hee (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Park, Gwan Soo (Department of Environment and Forest Resources, Chungnam National University)
  • 김길남 (국립산림과학원 산림유전자원부) ;
  • 한심희 (국립산림과학원 산림유전자원부) ;
  • 박관수 (충남대학교 산림자원학과)
  • Received : 2014.07.29
  • Accepted : 2014.08.19
  • Published : 2014.12.30


The impacts of high temperature and drought were studied on the seedlings of three families (superiorgangwon74, intermediate-gangwon77 and inferior-gangwon132) of P. densiflora which had been selected by the based on the growth indexes of 32-year-old. The seedlings were grown in controlled-environment growth chambers with combinations of four temperatures ($-3^{\circ}C$, $0^{\circ}C$, $+3^{\circ}C$ $+6^{\circ}C$; based on the monthly average for 30 years in Korea) and two water conditions (control, drought). The growth performance, photosynthetic parameters and photosynthetic pigment contents were measured at every 30 days under four temperatures and drought condition, and the end of each treatment. The superior family showed higher relative diameter at root collar growth rate and the dry weight than intermediate and inferior family in all treatments. Under elevated temperature and drought condition, growth rate was decreased, and seedlings showed lower growth rate than that of control in three families under low temperature. Photosynthetic rate, stomatal conductance and transpiration rate of three families decreased with the increase of temperature and drought condition, and that of seedlings under low temperature was lower than control. But under elevated temperature and drought condition, water use efficiency increased in three families. Photosynthetic pigment contents of leaves decreased under the increase of temperature and drought condition, but chlorophyll a/b ratio increased with the increase of temperature and drought condition in three families. The superior family showed higher total chlorophyll content than intermediate and inferior family in all treatments. In conclusion, P. densiflora is under changed temperature and drought condition, growth was decreased, seedlings more affected in elevated temperature than that of decreased temperature. The increase in monthly average temperature in Korea of more than $6^{\circ}C$, P. densiflora seedling growth in depending on region may decrease. In this study, the superior family(gangwon74) showed more excellent growth and physiological responses than intermediate (gangwon77) and inferior(gangwon132) family under changes temperature and drought.


Pinus densiflora;relative growth rate;photosynthetic rate;stomatal conductance;transpiration rate;photosynthetic pigment


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