S. M. El-Darier
Botany Department, Faculty of Science, Alexandria University, Alexandria, Egypt
R. S. Youssef
Botany Department, Faculty of Science, Alexandria University, Alexandria, Egypt
M. A. Hemada
Botany Department, Faculty of Science, Alexandria University, Alexandria, Egypt
ABSTRACT
In study area the pH of the soil under cotton and tomato plants was increased by CaCO3 fall-out on the soil surface. The two species received the maximum deposition of CaCO3 dust (1.09 and 1.64 mg cm-2 of leaf surface area respectively) at plot I (lies directly on the road). This may explain why their growth was significantly retarded at this plot as compared with plot II and III (40 and 100 m respectively away from the road). Such reduction in plant growth had resulted in a significant decrease in fruit yield, which amounted to 54, and 25% respectively relative to plot III. Chlorophyll `a` increased in both plants with the increase in CaCO3 dust whereas chlorophyll `b` decreased and the increase in the first exceeded the decrease in the latter causing an increase in chl a/b ratio.The percentage increase in N (62%) and K (31%) in cotton and P (79%) and K (150%) in tomato was higher in the vicinity of the road (plot I). The other elements (P, Na, Ca and Mg in cotton; N, Na, Ca and Mg in tomato) showed tendency to decrease with the increase in CaCO3 dust. In this context, the low concentration of Na and high concentration of K in the two species at the same plot has lead to a decrease in Na/K ratio. Currently, the low Ca2+ content in two species in the vicinity of the road indicate that these plants may bind Ca2+ taken in water insoluble form and can maintain themselves to some extent in CaCO3 polluted environment. Mg followed the same trend as that of Ca2+.
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How to cite this article
S. M. El-Darier, R. S. Youssef and M. A. Hemada, 2001. Ecophysiological Disturbances in Cotton (Gossypium barbadense L.) and Tomato (Lycopersicon esculentum Mill.) Plants in Response to CaCO3 Dust, Emitted from Asphalt-Batch Processes. Pakistan Journal of Biological Sciences, 4: 1406-1410.
DOI: 10.3923/pjbs.2001.1406.1410
URL: https://scialert.net/abstract/?doi=pjbs.2001.1406.1410
DOI: 10.3923/pjbs.2001.1406.1410
URL: https://scialert.net/abstract/?doi=pjbs.2001.1406.1410
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