EFFECT OF SOME PLANT EXTRACTS ON MORPHOLOGICAL AND ANATOMICAL CHARACTERS OF Corchorus olitorius L., IN RELATION TO ITS RESISTANCE TO DODDER INFECTION

Document Type : Original Article

Authors

1 Plant Protection Dept., Fac. Agric .• Fayoum, Cairo Univ.

2 Agricultural Botany Dept., Fac. Agric., Cairo Un;v., Giza

Abstract

Aqueous plant extracts of ajowan, belladonna and canna were applied to
study their effects on the growth of dodder (Cuscuta camp < /em>estris Yunck) infecting jews
mallow (Corchorus olitorius L ) , to find out whether these effects would specify the
nature of resistance to dodder ( mechanical or chemical ). The results of dodder
growth showed a gradual corresponding inhibition by increasing the concentrations of
the extract source.The highest positive results were achieved by ajowan extract,
followed by belladonna • while canna was the lowest .On the contrary , the
components of the vegetat:ve yield (fresh and dry weights) of jews mallow were
increased by decreasing the concentration as the lowest extract concentration of
either ajowan or belladonna gave the highest vegetative yield components. Treatment
of dodder seeds with jew's mallow extract showed no effect on germination indicating
the high susceptibility of jew's mallow to dodder infection while, the chemical
resistance was clearly observed in treatment with ajowan extract. The disadvantage of
the high concentration of ajowan was that it decreased the vegetative growth and the
stem diameter of jews mallow. The anatomical study revealed that, this was due to the
decrease in thickness of different tissues, although the parasite failed completely to
penetrate the epidermis.The lowest concentration gave a reverse effect by increasing
thickness of the vascular system although it gave 86.5% resistance.

Keywords

Journal of Plant Production
Volume 29, Issue 1
January 2004
Pages 175-190

Files

Share

How to cite

Statistics