چکیده:
Laboratory studies were conducted to examine the effects of different concentrations of wild barley (Hordeum spontaneum Koch.) shoot and seed extracts on germination and seedling growth of wheat (Triticum aestivum L.) and wild barley. In this study, all wild barley shoot extract concentrations (with exception of lowest concentration) significantly reduced wheat seed germination after 7 days. Shoot extract concentrations of 60 and 120 g / L significantly reduced shoot and root lengths, shoot fresh and dry weights, and, root fresh and dry weights of wheat. Seed germination of wheat was not affected by intermediate wild barley seed extracts. Considerably, some extracts of wild barley seeds stimulated the germination and growth of wheat. Wild barley shoot and seed extracts at low level stimulated the growth of its own plant, however, its germination and seedling growth were inhibited at higher shoot extract concentrations. The results of this investigation show that wild barley shoot extracts exert more allelopathic effects on germination and growth of wheat and its own plant than those of seed extracts.
خلاصه ماشینی:
In this study, all wild barley shoot extract concentrations (with exception of lowest concentration) significantly reduced wheat seed germination after 7 days.
Considerably, some extracts of wild barley seeds stimulated the germination and growth of wheat.
Wild barley shoot and seed extracts at low level stimulated the growth of its own plant, however, its germination and seedling growth were inhibited at higher shoot extract concentrations.
The results of this investigation show that wild barley shoot extracts exert more allelopathic effects on germination and growth of wheat and its own plant than those of seed extracts.
, 1986) found that water extracts from residues of the genus Brassica significantly reduced root and coleoptile length of wheat with little effect on germination.
Results Effects of wild barley shoot and seed extracts on wheat germination and seedling growth All wild barley shoot extract concentrations (with exception of 7.
The most severe reductions were observed in wheat SL and RL treated with 60 and 120 g/L wild barley shoot extract concentrations (Figures 1B and 1C).
The effects of wild barley seed extract treatments on wheat SL and RL are showed in Figures 2B and 2C.
The data in Fig. 4G and 4H demonstrates the effects of wild barley seed extract 39 concentrations on its own root FW and DW.
Compare to wheat, the large depression in wild barley seed germination due to its own shoot extract levels may be attributed to lower resistance of this species to allelochemicals.
Extracts from the seeds of wild barley almost stimulated its own seedling growth.