جستجوی مقالات مرتبط با کلیدواژه "آللوکمیکال" در نشریات گروه "بیوتکنولوژی و ژنتیک گیاهی"

To determine the allelopathic potential of Ziziphora clinopodioides Lam. on seed germination and seedling growth of chickpea and soybean in laboratory condition, an experiment based on completely randomized design with four replications and six treatments was carried out including distilled water as control, aqueous extract concentrations of Z. clinopodioides by 2.5, 5, 7.5, 10 and 15% (w/v) at Complex Higher Education of Shirvan during 2014. Germination percentage and rate, seedling shoot and root length, dry weight of chickpea and soybean significantly affected by aqueous extract concentrations of Z. clinopodioides in 5% probability levels. Germination percentage and rate of chickpea and soybean significantly decreased by increasing extract concentration. The most inhibitive effect was observed in 15%, that germination percentage of chickpea and soybean decreased by 17.5 and 23.5%, respectively compared to control. Z. clinopodioides extract had more inhibitive on germination rate than germination percentage. Z. clinopodioides aqueous extract significantly delayed the germination of chickpea and soybean. With increasing concentration of aqueous extract of shoot and root inhibition was more impressed than chickpea and soybean. Shoot and root dry weight of soybean showed more reduction than seedling dry weight of chickpea. However, shoot and root dry weight of soybean seedling decreased by 82.2 and 67% respectively, compared to control, while shoot and root dry weight of chickpea seedling decreased by 60 and 53.2%, respectively. According to the inhibitory effect of Z. clinopodioiedes, on growth of chickpea and soybean in farms growing perennial herbs such as Z. clinopodioiedes is not recommended.

Broomcorn is extensively cropped in Miyaneh region for traditional broom production and occasionally included in rotation with barley by local farmers. The research objective was clarifying of broomcorn allelopathic potential on barley germination and initial growth. Allelopathic properties of 2.5, 5, 7.5, and 10% of broomcorn roots and shoots aqueous extracts sampled 1, 2, 3, and 4 months after planting, also root exudates using equal compartment agar method and 5 and 10% of intact and burnt crop residues aqueous extract on barley germination and initial growth were evaluated. Also, 2.5, 5, 7.5, and 10% of 3-month broomcorn foliar extracts on barley seedlings growth was evaluated in greenhouse condition. Broomcorn root extracts was less allelopathic on barley seed germination, also 3-month foliar was the most allelopathic studied plant organs on seed germination and growth of barley. Also, broomcorn root exudates were more toxic on barley plumule than radicle. Residue burning decreased allelopathic effect of broomcorn residue up to 77%. Irrigating with broomcorn extracts had less allelopathic effects than direct bioassay on barley seedlings in laboratory. Considering remarkable allelopathic potential of broomcorn on barley, its residue management should be concerned in broomcorn-barley rotations.