IRRADIATED POTATOES IDENTIFICATION BY THERMOLUMINESCENCE AND SEED TUBERS GROWTH ANALYSIS IN CASE OF LOW GAMMA DOSE AND LATE IRRADIATION: Potato processing and irradiation identification
2023
Kharfi, Faycal
ABSTRACT: In this work, irradiated DESIREE potato was successfully identified by thermoluminescence technique forgamma dose up-to 1500 Gy. Selected SPUNTA and DESIREE potato seed tubers were also cultivated after being irradiatedwith different gamma low doses, varying from 10 to 150 Gy. Effects of gamma irradiation on plant growth, sugar content,and yield were studied. The potato seed tubers were late irradiated three weeks before planting. The analysis of tuber’sprogenies shows non-mutation in terms of eye colour, skin colour and texture for low doses below 25 Gy. The emergencepercentage of the plants were optimal for the dose interval of 10-25 Gy. No emergence ability has occurred at 55 Gy and75 Gy and higher dose for SPUNTA and DESIREE, respectively. Irradiation with 10-25 Gy promoted tubers formation.There was no morphological growth enhancement at 25 Gy and higher dose, and no survival of the plants at 65 Gy and85 Gy and higher doses for SPUNTA and DESIREE, respectively. The effects of gamma radiation on irradiated but notplanted tubers show that total sugars content increases from ~1.5% to ~3.5% for low doses and keeps constant for higherdoses. The harvested tubers produced from irradiated planted seeds show a constant sugar content even dose changes andnon-influence of the irradiation on total sugar consumption and production. This study indicates too that late irradiationwith low dose below 25 Gy (10Gy) significantly increases leaves number (+~75%) and growth capability in terms oftuber’s weight (15-30%).
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