잠시만 기다려 주세요. 로딩중입니다.

作物에 吸收된 放射性 同位元素의 內部照射效果에 關한 硏究(第8報)

Studies on the effects of radiation from radioisotopes incorporated into plants(Ⅷ)

한국식물학회지 1969년 12권 3호 p.26 ~ 34
孫應龍, 金吉煥, 車鍾煥,
소속 상세정보
孫應龍 (  ) - 高麗大學校
金吉煥 (  ) - 科學技術處
車鍾煥 (  ) - 東國大學校

Abstract


Through immersing barley seeds (variety; Suwon No. 6) into different dilution of carrier-free P-32 original solution (Total activity; 90mc. To; 3/21) for 24 hours at room temperature, four groups of seeds (each group consists of 200 seeds) having activity levels of 1.6×10 exp (-3) μc ^(32)P/grain, 2.3×10 exp (-1) μc ^(32)P/grain 6.9×10 exp (0) μc ^(32)P/grain and 2.5×10 exp (1) μc ^(32)P/grain respectively, were obtained. To investigate the effects of various activity levels of P-32 absorbed upon the test plants, the seeds were germinated, transplant into the pots, and the growth was observed for three months after germination.
After harvest, the inorganic contents in the leaves and the stems were also analyzed. The results:
1) Until four days after the beginning of germination, the rate of germination was found the lowest at the strongest activity level of 2.5×10 exp (1) μc/grain. At the other P-32 levels treated, it showed generally higher than the control.
2) Before transplanting the seedlings of both 1.6×10 exp (-3) μc/grain and 2.3×10 exp (-1) uo/grain levels showed more vigorous growth than the control, whereas at the 6.9×10 exp (0) uc/grain level a retarded growth was conspicuous and all of plants belonging to the highest activity level of 2.5×l0 exp (1) μc/grain were withered owing apparently to the radiation damage.
3) This trend of growth promotion was continually observed at the low activity levels even after transplanting the seedlings to the pots. As for the plants belonging to 6.9×10 exp (0) μc/grain level, a clear sign of graduai recovery from the damage afflicted at the earlier stage was observable, and as a result the plants showed more growth than those of control two months after transplanting.
4) The number of stems diverged was found somewhat small in the blocks treated with P-32, compared with that of control until two months after germination. At the later stage of growth there seemed no significant difference among themselves.
5) The dry weight of leaves and stems was proved that the lower the activity, the more it was produced. The relative increase of dry matter in each treatment compared with the control was 2% at 6.9×10 exp (0) μc/grain level, 9% at 2.3×10 exp (-1) μc/grain and 35% at 1.6×10 exp (-3) μc/grain respectively.
6) The inorganic contents of the leaves and stems harvested were proved that:
(1) Nitrogen was highest at the lowest activity level of 2.3×10 exp (-1) μc/grain.
(2) Phosphorus showed generally higher contents in the treated blocks than in control, with the peak being at 2.3×IO exp (-1) μc/grain level in the leaves and at 6.9×10 exp (0) μc/grain in the stems.
(3) These was no significant difference in potassium contents in the leaves between treatment and control, whereas in the stem the trented blocks were higher than control roughly in propotion to the activity level.
(4) Calcium in the lesves was richer in treated blocks than control while in the stem no difference was seen.
(5) Magnesium contents both in leaves and in stems there was no difference among treatments.

키워드

원문 및 링크아웃 정보

등재저널 정보