Simulated Storage Germination and Growth Responses in Carrot Seedlings Grown from Artificially-Aged Seeds
Simulated Storage Germination and Growth Responses in Carrot Seedlings Grown from Artificially-Aged Seeds
Uzma Arif1, Sadar Uddin Siddiqui2, Muhammad Fareed Khan1, Muhammad Arshad3 and Shakeel Ahmad Jatoi2
ABSTRACT
Seed deterioration behavior during storage of carrot seeds was assessed by subjecting them to controlled-ageing for different temperatures and incubation time during 2016 at Seed Preservation Laboratory, Bio-resources Conservation Institute, NARC, Islamabad. Forced seed ageing was carried out at 25, 30, 35 and 40°C for Day-one (D1) through day-six (D6) of incubation period. Observations were recorded for percent germination, shoot length (cm), root length (cm), fresh seedling biomass (g) and dry seedling biomass (g); revealing significant differences at all temperature regimes, controlled incubation period for ageing as well as their interaction. Rising temperatures was much steeper and negatively correlated as compared to the incubation period. The germination rate declined gradually at all temperatures, whereas, at higher temperature of 45°C accompanied with longer incubation periods (D5 and D6) the germination process ceased to progress. Similarly, the growth performances of the seedlings were slower at higher temperatures coupled with longer storage periods. The aging led to decline in seedling fresh and dry biomass as well as root and shoot development capacity; while the deleterious effect of higher temperature (45°C) were more pronounced and severely affected the seedling growth and development from start. The information generated on seed behavior under storage conditions in this study; would be helpful to devise better strategy for short- and long-term storage of carrot seeds as well as seed of other crops of similar category.
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