Ali,, I., Sabh, A. (2004). EFFECT OF SOME PLANT EXTRACTS ON MORPHOLOGICAL AND ANATOMICAL CHARACTERS OF Corchorus olitorius L., IN RELATION TO ITS RESISTANCE TO DODDER INFECTION. Journal of Plant Production, 29(1), 175-190. doi: 10.21608/jpp.2004.238472
I. H. H. Ali,; A. Z. E. Sabh. "EFFECT OF SOME PLANT EXTRACTS ON MORPHOLOGICAL AND ANATOMICAL CHARACTERS OF Corchorus olitorius L., IN RELATION TO ITS RESISTANCE TO DODDER INFECTION". Journal of Plant Production, 29, 1, 2004, 175-190. doi: 10.21608/jpp.2004.238472
Ali,, I., Sabh, A. (2004). 'EFFECT OF SOME PLANT EXTRACTS ON MORPHOLOGICAL AND ANATOMICAL CHARACTERS OF Corchorus olitorius L., IN RELATION TO ITS RESISTANCE TO DODDER INFECTION', Journal of Plant Production, 29(1), pp. 175-190. doi: 10.21608/jpp.2004.238472
Ali,, I., Sabh, A. EFFECT OF SOME PLANT EXTRACTS ON MORPHOLOGICAL AND ANATOMICAL CHARACTERS OF Corchorus olitorius L., IN RELATION TO ITS RESISTANCE TO DODDER INFECTION. Journal of Plant Production, 2004; 29(1): 175-190. doi: 10.21608/jpp.2004.238472
EFFECT OF SOME PLANT EXTRACTS ON MORPHOLOGICAL AND ANATOMICAL CHARACTERS OF Corchorus olitorius L., IN RELATION TO ITS RESISTANCE TO DODDER INFECTION
2Agricultural 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.
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