Influence of gamma rays on cell division in the seed roots of irradiated dry seeds of Vinca rosea L.

Journal Article · Fri Sep 01 04:00:00 EDT 1972 · Cytologia (Tokyo), v. 37, no. 3, pp. 445-456

OSTI ID:4319232

Sudhakaran, I V

The dry seeds of Vinca rosea L. were irradiated using different doses of gamma rays. The germinanting seeds exhibit delay in the time of germination and reduction in the percentage of germination. A decrease in the rate of increase in the length of the seed roots with increasing dose of gamma rays is also observed. The mitotic abnormalities such as stickiness and clumping of the chromosomes, sticky bridges, and structural changes followed by the bridges and fragments are quite frequently met with in the dividing cells in the present plants. These are relatively the same as the usual characters observed in the actively dividing irradiated cells of root tip in other plants by previous workers. It is to be noted that in the present plant the cells of the root tips are not directly exposed to radiation and these cells are formed later in the root tips during germination of the irradiated seeds and it is quite likely that any metabolic imbalance can be induced in the cells. Thus these abnormalities of chromosomes during cell division cannot probably be attributed only to the direct effect of irradiation on the chromosomes but it is likely that these irregularities and others leading to mitotic delay and inhibition of mitosis are due to the formation of mitotic poison through the breakdown of micro- and macromolecules in the cytoplasm in the dividing cells during the germination of the irradiated seeds. (auth)

• Research Organization: Inst. of Science, Bombay
• NSA Number: NSA-29-018585
• OSTI ID: 4319232
• Journal Information: Cytologia (Tokyo), v. 37, no. 3, pp. 445-456, Journal Name: Cytologia (Tokyo), v. 37, no. 3, pp. 445-456; ISSN CYTOA
• Country of Publication: Japan
• Language: English

Related Subjects

*CELL DIVISION-- BIOLOGICAL RADIATION EFFECTS
*PLANT CELLS-- MITOTIC INDEX
*ROOTS-- CELL DIVISION
*SEEDS-- GERMINATION
GAMMA RADIATION
IRRADIATION
N48410* --Life Sciences--Radiation Effects on Plants--Basic Studies
PLANTS