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Bulletin of Botanical Research ›› 1996, Vol. 16 ›› Issue (1): 108-113.

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EFFECTS OF 60Co-r RAY RADIATION ON TOMATO'S ROOT TIP CELLS WITH RADIATING TOMATO SEEDS

Guo Gui-yun, Wang Yan-ying, Liu Zhen-dong, Mi Xiao-ju, Wang Gui-ling, Xie Gui-qin   

  1. Biology Department of Harbin Normal University Harbin, 150080, Heilongjiang
  • Received:1995-05-01 Online:1996-03-15 Published:2016-06-14

Abstract: We studied the effect of tomato root tip cells radiated tomato dry seeds with 60Co-r Ray, after they grew root in the water, observed chromosome bridge, chromosome fragments (including lagging chromosome), adhesion, micronucles ect abnormal chromosome type. The result show that the abnormal rate is lowest, when irradiation dose is in range 5-10 Krad; it is the highest and the types of abnormal chromosome is the most abundant, when the irradialion dose is in 10-20 Krad. In this range, quantity of the chromosome fragment is increasing, when the irradiation dose is enhanced, poly-bridge exist, besides single chromosome bridge. Chromosome are damaged seriously, when the irradiation dose is over 20 Krad. This dose is harmful to growth of tomato and the cells. By C. K. experiment and statistics. We can say, the irradiation dose controls the splits of root tip's cells.

Key words: Tomato, 60Co-r ray, Abnormal chromosome, Adhesion, Chromosome fragment, Chromosome bridge, Micronucles