Effect of a serial irradiation of low dose gamma rays on the growth and photosynthesis of red pepper (Capsicum annuum L.) plants
0
조회
0
다운로드
0
인용
0
참고문헌
초록
Abstract
To reveal the relationship between the changes in the growth and photosynthesis induced by low dose radiation, red pepper (Capsicum annuum L.) plants were serially irradiated three times with gamma rays of 0.5, 1, 2, 3, and 4 Gy. The plant growth was monitored by the fresh weight, the stem length, and the leaf length & width. All the irradiation groups (0.5-4 Gy) were stimulated in growth at 1 day after the 1st irradiation (DA1I), but rather inhibited at 3 days after the 3rd irradiation (DA3I). The maximum photochemical efficiency (Fv/Fm), the photochemical quenching (qP), the non-photochemical quenching (NPQ) and the apparent rate of the photosynthetic electron transport (ETR) were used to represent the changes in the photosynthesis by the serial irradiation. The irradiation groups except 0.5 Gy had higher Fv/Fm values at 3 DA3I than the control one. After the 3rd irradiation, the qP values appeared to be a little lower in the 1-4 Gy groups than in the control and 0.5 Gy ones. In contrast, the NPQ values were rather higher in the irradiation groups except 0.5 Gy. During the whole experimental period, the ETRs decreased in the control group but remained relatively constant in the 4-Gy one. In conclusion, the results obtained indicate that the stimulatory effect of ionizing radiation on the plant growth was determined by the incident dose of the single irradiation rather than by the cumulative one of the serial irradiation. They also demonstrate that the growth stimulation induced by a low dose radiation could not be positively correlated with an alteration in the photosynthesis. Additionally, we discuss in text that an ionizing radiation may partly protect the leaf senescence by delaying the development of the plants.
참고문헌 (20)
- Batt T, "Changing activitiesduring senescence and sites of synthesis of photosyntheticenzymes in leaves of the Labiate", pp.569~579 (1975)
- Charbaji T, "Effect of low doses ofgamma irradiation on in vitro growth of grapevine", 57, pp.129~132 (1999)
- Eidus LKh, "Hypothesis regarding a membraneassociatedmechanism of biological ction due to lowdoseionizing radiation", Radiat Environ, pp.39:~
- JM Briantais, "Relationshipbetween the quantum yield of photosynthetic electrontransport and the quenching of chlorophyll fluorescence", pp.87~990 92 (1989)
- Hensel LL, "Developmental and age-related processes thatinf luence the longevity and senescence of photosynthetictissues in Arabidopsis", pp.553~564 (1993)
- Horton P, "Regulation oflight harvesting in green plants indication by nonphotochemicalquenching of chlorophyll fluorescence", pp.415~420 (1994)
- Jiang C-Z, "and their regulationby transcription in senescing soybean leaves", pp.105~112 (1993)
- Kim J-H, "Alterations in the photosynthetic pigments andantioxidant machineries of red pepper seedlings from gamma-irradiated seeds" (2004), in press
- Kim J-H, "Comparison of sensitivity to photoinhibition andUV-B stress between developing and mature leaves ofred pepper plants from controland gamma-irradiated seeds", 45, pp.66~73 (2004)
- Lee EK, "Effect of lowdose γ-ray irradiation on the germination and growthin red pepper(Capcicum annuum L.).", 39, pp.670~675 (1998)
- Lee H-Y, "Effects of low dose γ-radiation on photosynthesisof red pepper and thereduction of photoinhibition", 21:, pp.83~89 (2002)
- Lee H-Y, "Effects of low dose γ-radiation on the growth activities of enzymes and photosynthetic activities ofgourd", 20 (2002)
- Luckey TD, "Hormesis with ionizing radiation" (1980), CRCPress
- Miller MW, "Radiation Hormesis in plants", pp.607~616 (1987)
- Muller P, "Non-photochemical quenchingA response to excess light energy", 125, pp.1558~1566 (2001)
- Whole plant senescence, "InSenescence and aging in plants", (oden ld oden ld and acleopold eds), pp.391~439 (1988), Academic Press Inc
- Oxborough K, "Resolving chlorophyll afluorescence images of photosynthetic efficiency intophotochemical and non-photochemical components -Calculation of qP and Fv′", Fm′ without measuring Fo′, 1997, pp.54:, 135~142
- Smart CM, "Gene expression during leaf senescence", pp.419~448 (1994)
- Thiede ME, "Effects of gamma radiation on stem diameter growth carbon gain and biomass partitioning in Helianthusannuus", 35, pp.33~41 (1995)
- van Kooten O, "The use of chlorophyllfluorescence nomenclature in plant stress physiology", pp.147~150 (1990)