PENGARUH BERBAGAI KONSENTRASI DAN LAMA WAKTU PERENDAMAN GLIFOSAT TERHADAP MITOSIS DAN ABERASI KROMOSOM AKAR BAWANG BOMBAY (Allium cepa cv GLADALAN BROWN).

The research was carried out to study the effect of various concentration (0, 30, 50, 80 and 100 ppm ) and duration of soaking time (3, and 6 hours) to mitotic index and chromosomal aberration on onion root (Allium cepa cv Gladalan Brown ). This research used experimental method with completely randomized design 2X5 factorial patterns. Experiment were repeated four times for every concentration and soaking time. The data was analyzed by using ANOVA test and The Newman- Keuls test. Permanent root squash preparation used Mc Clintock’s fixative solution and stained with aceto orcein. The result showed that various glyphosate concentration and the duration of soaking time significantly influenced the reduction of mitotic index value. The lowest mitotic index on glyphosate concentration 100 ppm i.e. 10. 73% and 7.19% for the duration of soaking time 3 and 6 hours. The highest mitotic index on glyphosate concentration 0 ppm i.e. 37.71% and 32.76% for the duration of soaking time 3 and 6 hours. The result also showed that the chromosomal aberration were increased significantly. The lowest chromosomal aberration obtained from the glyphosate concentration 0 ppm i.e. 2.55% and 2.96% for the duration of soaking time 3 and 6 hours. The highest chromosomal aberration obtained from the glyphosate concentration 100 ppm i.e. 21.71% and 36.26% for the duration of soaking time 3 and 6 hours. The type of chromosomal aberration were abnormal prophase, stickiness, bridge, abnormal anaphase, clumping chromosome, c- metaphase, change of nucleous shape and siz