ALLELOPATHIC EFFECTS OF DOPA AGAINST FOUR WEED SPECIES

Abstract

Dopa is a natural product of some plants such as velvetbean. Its herbicidal effects on weed

species; wild mustard (Sinapis arvensis), creeping thistle (Cirsium arvense), field poppy

(Papaver rhoeas) and henbit (Lamium amplexicaule) were investigated using wheat (Triticum

vulgare) and barley (Hordeum vulgare) species as control plants. Dopa showed suppressive

herbicidal effect at 1500 and 3000 mg/l concentrations on the weeds without significantly

affecting wheat and barley growth. The most affected weed species was found field poppy.

Comparing growth of all weeds, inhibition in the growth of roots was more prominent

compared to the growth of shoots.

Keywords

• Allelochemical,dopa,herbicidal effect,seedling growth,weed control

DOPA’NIN YABANCI OTLAR ÜZERİNDE ALLELOPATİK ETKİSİ

Abstract

Dopa kadife bakla gibi bazı bitkilerin tabi bir ürünüdür. Bu çalışmada yabancı otlar; Yabani

hardal (Sinapis arvensis), köy göçüren (Cirsium arvense), gelincik (Papaver rhoeas) ve

ballıbaba (Lamium amplexicaule) türleri ile buğday ve arpa üzerine dopanın herbisit etkisi

araştırılmıştır ve karşılaştırılmıştır. Dopanın 1500 ve 3000 mg/l konsantrasyonları yabancı

otların gelişimini istatistiksel olarak önemnli derecede azalma fakat buğday ve arpada çok

olumsuz bir etkisinin bulunmadığı gösterilmiştir. Dopadan en çok etkilenen türün Papaver

rhoeas olduğu bulunmuştur. Kullanılan yabancı otların geneline bakıldığında kök

uzamasındaki azalma gövde uzamasından daha fazla olmuştur.

Keywords

• Allelokimyasal,dopa,herbisit etkisi,fide büyümesi,yabancı ot kontrolü

References

1. [1] VYVYAN, J. R., “Allelochemicals as leads for new herbicides and agrochemicals”,Tetrahedron, 58: 1631-1646 (2002).
2. [2] DUKE, S. O., SCHEFFLER, B. E. AND DAYAN, F. E., “Allelochemicals as herbicides”, In: N P Bonjoch, M J Reigosa, (eds). Physiological Aspects of Allelopathy. GAMESAL, SA: First European OECD Allelopathy Symposium, Pp.47-59 (2001).
3. [3] RICE, E. L., “Allelopathy- An update”, Bot. Rev., 45: 15-109 (1979).
4. [4] RIZVI, S. J. H. AND RIZVI, V., “Allelopathy”, 1st ed. London, UK. Chapman and Hall. Pp. 1-10 (1992).
5. [5] INDERJIT., DAKSHINI, K. M. M. AND FOY, C. L., “Principles and practices in plant ecology-Allelochemical interactions” New York, NY: CRC Press. Pp.255-266 (1999).
6. [6] KOCAÇALIŞKAN, I. AND TERZI, I., “Allelopathic effects of walnut leaf extracts and juglone on seed germination and seedling growth”, J. Hort. Sci. Biotech., 76: 436-440 (2001).
7. [7] TAKAHAMA, U., “Enhancement of the peroxidase-dependent oxidation of dopa by components of Vicia leaves”, Phytochemistry, 46: 427-432 (1997).
8. [8] BATISH, D. R., KOHLI, R. K., SINGH, H.P. AND SAXENA. D. B., “Studies on herbicidal activity of parthenin, a constituent of Parthenium hysterophorus towards billgoat weed (Ageratum conyzoides)”, Curr. Sci. 73: 369-371 (1997).

9. [9] REHR, S. S., JANZEN, D.H. AND FEENY, P. P., “L-dopa in legume seeds; a chemical barrier to insect attack”, Science, 181: 81-83 (1973).
10. [10] FUJII,Y., SHIBUYA, T. AND YASUDA, T., “Allelopathy of velvetbean: its discrimination and identification of L-DOPA as a candidate of allelopathic substances”, Jpn. Agric. Res., 25: 238-247 (1992).