current experimental work has been designed to study the effect of UV-B
exposure on the seedling growth and meiotic consequences of Eclipta alba
Methodology: The seedlings were exposed to UV-B radiation for
different time durations, i.e., 40, 80, 120 min along with control sets. UV-B
irradiated seedlings along with respective controls were sown in the field
and young floral buds were fixed in Carnoy?s fixative for 24 hrs and
preserved in 90% ethanol for meiotic study.
Results: Exposure of UV-B exposure resulted in various
chromosomal aberrations like stickiness, laggards, bridges, unorientation,
precocious, multivalents etc. Chromosomal stickiness was profound abnormality
encountered at shorter duration (40 min) to UV-B exposure. The results
revealed that UV-B exposure for shorter duration is quite beneficial to plant
as it induces significant cytomorphological and biochemical variations.?? ???????????
Interpretation: Shorter exposure to UV-B radiation
induced certain beneficial traits in Eclipta alba. Since, Eclipta
alba is a medicinally significant plant, hence, it is essential to
improve their quantitative and qualitative traits through induced mutagenesis
using UV-B radiation to impel the novel characteristics of plant.? ?????
Meiotic aberrations, Seedling growth, UV-B radiation