Seed priming of Roselle in related to improve seedling characteristics

One of the most common strategies that researchers suggest for improving and uniformity of germination, recovery and speed of emergence and plant establishment is seed priming. The present study was been conducted in order to use seed preparation technology to increase resistance to environmental stresses and to investigate the effect of seed hydropriming and osmopriming on germination indices and seedling growth of Roselle. Eexperiment based on a completely randomized design with ۳ replicates were conducted at agriculture laboratory of Minab Higher Education Center, University of Hormozgan in ۲۰۲۰. In this experiment, the effect of different pretreatments were evaluated on germination indices of roselle. These pretreatments were the use of distilled water (۰, ۱۲ and ۲۴ hours), potassium nitrate (۰.۵ and ۱% for ۱۲ and ۲۴ hours), sodium sulfite (۰.۵ and ۱% for ۱۲ and ۲۴ hours), potassium chloride (۱ and ۲% for ۱۲ and ۲۴ hours) and calcium carbonate (۱ and ۲% for ۱۲ and ۲۴ hours. Numbers of germinated seeds in each petri-dish were counted and recorded once every ۲۴ hours and germination indices were measured at the end of the The thirteenth day which germination was fixed. Germination indices and seedling growth traits of Roselle including, germination percentage, median time of germination, coefficient velocity of germination, radicle and shoot length, leaf and root fresh weight and leaf and shoot dry weight was evaluated and measured. The analysis of variance revealed significant (P < ۰. ۰۱ and P < ۰.۰۵) differences in most of the studied traits. Application of different pretreatments increased the germination indices of Roselle. The results showed that, pretreatment with calcium carbonate ۲% for ۲۴ hours could induce the highest indices of germination and seedling growth traits in Roselle. Significant correlation conducted between coefficient velocity of germination, radicle length and median time of germination

کلیدواژه ها:

Medicinal plant ، Hydropriming ، Osmopriming ، Germination indices ، Seedling establishment