Gibberellic Acid Protection against EMS and MMS Induced Damage to Chromosomes in Pisum sativum L
1976 年 41 巻 2 号 p. 291-297
詳細
1976 年 41 巻 2 号 p. 291-297
Meiotic studies indicated that EMS (0.25%) and MMS (0.025%) induced a large number of aberrations such as reciprocal translocations comprising rings and chains of 4, 6 and 8 chromosomes; inversions consisting of chromosomal and chromatid bridges and fragements, laggards; and unequal distribution of chromosomes. In a few cases rings of 6 and 8 chromosomes were found in the same PMC, indicating that all the 7 pairs of chromosomes were labile to the action of these mutagens. Reduction in chromosome aberrations in M2 and M3 and a slight increase in M3 over M2 was observed in all treatments. Post treatment with gibberellic acid at 1000ppm effectively reduced the chromosomal damage in M1 and was more effective in the case of MMS than EMS. The aberrations in M2 and M3 in gibberellic acid post-treated plants were decreased as compared to M1 generation.
