2001 年 66 巻 4 号 p. 373-378
The present investigation study the morphological and cytogenetic effects of Calotropis procera extract on Vicia faba L. The control plants being normal while treated ones are significantly affected. Four concentrations (5, 15, 30, 60%) of this extract were applied for 3 duration time. For treated seeds, low doses caused increase in mitotic indix (MI) and exhibit stimulatory effect on percentage of germination and plant height. On the other hand high concentratiosn gave rise to substantial reduction in MI, percentage of germination and plant height and all were found dose and time dependent. In contrast, all parameters tested for treated roots were found negatively affected with no exception and found more harmful and effective compared to seed treatment experiment. Various types of mitotic and meiotic abnormalities were observed. Their percentage of these abnormalities was also found dose and time dependent. Stickiness type was found more frequent compared with other types. The extract also affect chromosome association during meiosis. Chromosome pairing, chiasma frequency and pollen fertility were found negatively affected and dose dependent. The present data confirm the use of this extract as insect control at high concentrations is harmful to plants as non-target organism. It also recommend the use of lower concentration (15%), which has a significant affect on insect with very low side effects on plants.