Seed Priming Improves the Germination Traits of Tall Fescue (Festuca arundinacea)

Abstract

A couple of experiments were carried out to investigate the effects of osmopriming and hydropriming treatments on the germination indexes and seed vigor of Tall fescue (Festuca arundinacea). In the first experiment, fulfilled based on randomized complete block designed with four replicates, the effect of polyethyleneglycol 6000 solution with five osmotic potentials (-8, -10, -12, -14 and -16 bar), two temperatures (15 and 25 o C) and four time intervals (12, 24, 36 and 48 hours) was analized. The second experiment was fulfilled by using distilled water at two temperatures (15 and 25 o C) and four time intervals (12, 24, 36 and 48 hours) with four replicates on the above mentioned data. Then, based on the maximum germination rate and vigor indexes, the optimal treatment composition was determined for osmopriming and hydropriming solutions in regard to the osmotic potential, temperature and priming duration. In osmopriming experiment, treatment composition of 12 hours at 15 o C and -8 bar had the most significant effect on the percent and speed of germination, length of radicle, coleoptile and seedling, as well as vigor indexes in Tall fescue. For hydropriming, the effect analyzed in the same condition as osmopriming, was observed in the majority of evaluated traits; treatment composition of 12 hours prime and 15 o C had the maximum numerical value in comparison to control and other treatments. Finally, it is inferred that favorable effects of osmoand hydropriming at 15 o C temperature are more significant in comparison with the control group (none prime seeds).

Assessment of salinity tolerance in polycross progenies of tall fescue [Lolium arundinaceum (Schreb) S. J. Darbysh.)]

“…Low phenotypic (CVp) and genotypic (CVg) coefficient of variations were observed in RL (0.05 and 0.02), FWL (0.14 and 0.05), and DWL (0.15 and 0.07) for parents and in RL (0.05 and 0.02), FWL (0.13 and 0.07), and LL (0.26 and 0.18) in progenies indicated the unstable nature of the traits and are indicative of difficulty for improvement of the traits through selection but using the molecular marker and decrease the effect of environment interaction can help the breeder to improve these traits (Falconer and Mackay 1996). Observation of genetic variability in this study agreed with the results of the others who found significant difference among tall fescue genotypes for germination and emergence traits (Rouhi et al, 2011;Zhou 2006). …”

Effect of Pre-treatment of Barley Grain on Germination and Seedling Growth Under Drought Stress

“…Priming treatment is a successful practice for improving seed germination criteria performance and/or counteracted the harmful effect of drought stress. These results corroborate with the finding of Jalilian et al [52]; Rouhi et al [53] for hydropriming; and Ansari et al [4]; Rouhi et al [6]; Espanany et al [54] for potassium nitrate priming; and Afef et al [32], Hameed et al [35]; Ghajari et al [55] for silicon priming as well as Rouhi et al [53]; Aghbolaghi and Sedghi [56] for polyethyleneglycol, and Hamada and Khulaef [57]; Sayed and Gadalla [58] for thiamin they found that germination parameter were significantly increased by seed priming treatment under normal or drought stress conditions. Moreover, primed seedlings are known to emerge additional quickly and grow additional vigorously than those from nonprimed seeds [59].…”

“…In the present investigation, increasing drought stress induced a significant and prominent reduction in barley germination criteria. Similar results were reported [4,6,29,32], on a range of plant species. It can be proposed that under water restriction the velocity of water absorption is affected, where the absorption and consequently the hydrolysis and mobilization of carbohydrates are slower [48].…”

“…Germination and seedling stablishment are critical stages within the plant life cycle, in special beneath a biotic stress condition like drought [4,5]. Under a biotic stress cereal production is wide restricted by poor stand establishment and germination tends to be irregular and might extend over long periods as well as inhibited seedling growth [4,6]. The ensuing poor crop stands leave gaps within the canopy, which are rapidly filling with vigorously growing weeds.…”

Biomaterials Technology for AgroFood Resilience

“…to control water imbibition in seeds, which is particularly preferred for improving germination in cereal crops under drought stress. [24][25][26] Halopriming is a process where seeds are pretreated in salt (e.g., NaCl) solutions before sowing, which generally imparts tolerance against soil salinity to seed germination and subsequent seedling emergence. [27][28][29] Hormonal priming includes soaking seeds in aerated solutions of plant growth regulators such as ascorbic acid, salicylic acid, gibberellic acid, abscisic acid, and cytokinins, which has shown beneficial effects on seeds grown in saline soils [30][31][32] and under extreme temperatures.…”