報告書番号

U90048

タイトル（和文）

植物種子への低線量放射線照射が発芽に及ぼす効果Ｉ，発芽床の水分量，種子中の水分含有率および貯蔵期間の影響

タイトル（英文）

EFFECT OF LOW DOSES OF RADIATION ON THE GERMINATION OF PLANT SEEDS. I,WATER CONTENT IN THE GERMINATION BEDS,MOISTURE CONTENT AND STORAGE TIME OF SEEDS.

概要 （図表や脚注は「報告書全文」に掲載しております）

数種の植物種子に低線量放射線（０～３０Ｇｙ）を照射し，発芽に及ぼす効果について検討を行い，次の結果を得た。１．ホウレンソウおよびインゲンマメでは，発芽床の水分量が多い条件下では，発芽が抑制されるが，照射種子では無照射種子に比べ，高い発芽勢・発芽率を示した。２．ホウレンソウ種子を約１年間室温条件下で貯蔵した結果，貯蔵前に照射した種子が無照射種子に比べ，高い発芽勢・発芽率を示した。３．エンドウおよびインゲンマメにおいて，照射時の種子中の水分含有率を乾燥（約１１％）と湿潤（約４５％）にし，比較検討した結果，エンドウでは乾燥種子の発芽勢において，インゲンマメでは湿潤種子の発芽勢・発芽率において，照射種子が無照射種子に比べ高い値を示した。

概要 （英文）

THIS STUDY WAS CARRIED OUT TO EXAMINE THE EFFECT OF LOW DOSES OF RADIATION ON THE GERMINATION OF PLANT SEEDS. THE SEEDS WERE IRRADIATED WITH GAMMA RAYS RANGING FROM 0 TO 30 GY. AFTER IRRADIATION,THE SEEDS WERE SOWN IN PETRI DISHES AND HELD IN INCUBATORS AT 20 DEGREE FOR SPINACH AND PEAS AND AT 25 DEGREE FOR BUSH BEANS. THE RESULTS WERE AS FOLLOWS: (1)WHEN THE GERMINATION BED WAS VERY MOIST,THE GERMINATION RATES AND PERCENTAGES FOR IRRADIATED SPINACH AND BUSH BEAN SEEDS WERE HIGHER THAN THOSE FOR NON-IRRADIATED SEEDS. (2)WHEN SPINACH SEEDS WERE STORED FOR ONE YEAR AT 20 25DEGREE,THE GERMINATION RATE AND PERCENTAGE OF IRRADIATED SEEDS WERE HIGHER THAN THOSE OF NON-IRRADIATED SEEDS. (3)WHEN THE MOISTURE CONTENT OF PEA AND BUSH BEAN SEEDS BEFORE IRRADIATION WAS ABOUT 11% IN DRY SEEDS AND ABOUT 45% IN MOIST SEEDS,THE GERMINATION RATE OF DRY IRRADIATED PEA SEEDS,AND THE GERMINATION RATE AND PERCENTAGE OF IRRADIATED MOIST BUSH BEAN SEEDS WERE HIGHER THAN THOSEOF NON-IRRADIATED SEEDS.

報告者

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