Allelopathic effect of seed and glume extracts of wild oats (Avena sterilis L.) on the development of durum wheat (Triticum durum Desf.) at the germination stage

In this work, laboratory tests were carried out to evaluate the allelopathic effect of seed and glume extracts of Avena sterilis L. on root growth during the germination stages of a durum wheat landrace (MBB). A stimulating effect was observed on root number, where the maximum average number (4.91) was recorded with the 25% and 50% concentrations of powder extract. On the other hand, seed and glume extracts showed an inhibitory effect on root length at all concentrations. A minimum root length (5.17cm) was noted at the 25% concentration of the glume extract, while the lowest length (3.08cm) was recorded with the powder extract under the concentration (100%). The length of the first leaf was negatively affected by the powder extract, particularly at high concentrations (75%) and (100%), where the growth was inhibited and the first leaf was shriveled. The number of seminal roots, was relatively advantaged by all types of extracts which could be a new avenue of research at the biochemical and cytological levels.