Resumen

TIRYAKI, ISKENDER  y  KAPLAN, SAKIR ANIL. Enhanced germination performance of dormant seeds of Eragrostis tef in the presence of light. Trop. Grassl.-Forrajes Trop. [online]. 2019, vol.7, n.3, pp.244-251. ISSN 2346-3775.  https://doi.org/10.17138/tgft(7)244-251.

Lack of germination or low germination due to seed dormancy prevents successful crop establishment in several important plants. To determine the presence of innate seed dormancy and effects of stress-related plant hormones on germination performance of Teff (Eragrostis tef) seeds, we primed seeds in 1% KNO3 for 24 hours in dark conditions at 21 ( 0.5 ºC along with varying concentrations of chemicals known to influence seed germination, including: acetyl salicylic acid (ASA); methyl jasmonate (JA-Me); giberellic acid (GA3); and indole acetic acid (IAA). Primed seeds were incubated either in constant light (210 µM/m2/s) or in darkness at 21 ( 0.5 ºC. The results indicated that priming significantly improved final germination percentage (FGP) in both light (92.5%) and dark (89.4%) conditions compared with untreated seeds. The inclusion of plant hormones in the priming media generally had limited effects, except for 10 (M ASA (94.5%) and 100 (M GA3 (92.5%). ASA generally provided faster seed germination than seeds primed in 1% KNO3 only, while the other plant hormones had no effect on the time required for 50% of FGP in the dark. Priming had no significant effect on time span of germination in either light or dark incubation conditions. The results demonstrate that E. tef has light-inducible seed germination and about half of freshly harvested seeds can be dormant, which can be eliminated to some extent by priming seeds in 1% KNO3.

Palabras clave : Dormancy; hormone; photoblastism; priming; Teff.

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