Bassioni, N., Abou-Zeid, S., Abd-EI Aal, Y., EI-Kotb, H. (2006). EFFECT OF BICARBONATE AND HIGH PH ON ROOT GROWTH AND ACCUMULATION OF ORGANIC ACIDES IN TWO RICE CULTIVARS DIFFERING IN SUSCEPTIBILITY TO ZN DEFICENCY. Journal of Soil Sciences and Agricultural Engineering, 31(4), 2499-2411. doi: 10.21608/jssae.2006.203133
Nabila H. Bassioni; S. T. Abou-Zeid; Y. A. Abd-EI Aal; H. M. A. EI-Kotb. "EFFECT OF BICARBONATE AND HIGH PH ON ROOT GROWTH AND ACCUMULATION OF ORGANIC ACIDES IN TWO RICE CULTIVARS DIFFERING IN SUSCEPTIBILITY TO ZN DEFICENCY". Journal of Soil Sciences and Agricultural Engineering, 31, 4, 2006, 2499-2411. doi: 10.21608/jssae.2006.203133
Bassioni, N., Abou-Zeid, S., Abd-EI Aal, Y., EI-Kotb, H. (2006). 'EFFECT OF BICARBONATE AND HIGH PH ON ROOT GROWTH AND ACCUMULATION OF ORGANIC ACIDES IN TWO RICE CULTIVARS DIFFERING IN SUSCEPTIBILITY TO ZN DEFICENCY', Journal of Soil Sciences and Agricultural Engineering, 31(4), pp. 2499-2411. doi: 10.21608/jssae.2006.203133
Bassioni, N., Abou-Zeid, S., Abd-EI Aal, Y., EI-Kotb, H. EFFECT OF BICARBONATE AND HIGH PH ON ROOT GROWTH AND ACCUMULATION OF ORGANIC ACIDES IN TWO RICE CULTIVARS DIFFERING IN SUSCEPTIBILITY TO ZN DEFICENCY. Journal of Soil Sciences and Agricultural Engineering, 2006; 31(4): 2499-2411. doi: 10.21608/jssae.2006.203133
EFFECT OF BICARBONATE AND HIGH PH ON ROOT GROWTH AND ACCUMULATION OF ORGANIC ACIDES IN TWO RICE CULTIVARS DIFFERING IN SUSCEPTIBILITY TO ZN DEFICENCY
2Soil, Water and environment Res. Inst., A. R. C.. Cairo, Egypt.
Abstract
The objective of the present study was to evaluate the effect of bicarbonate
and high pH treatments separately on shoot and root growth and accumulation of
organic acids in the roots of two rice cultivars differing in susceptibility to Zn
deficiency. The results indicated that shoot and root dry weight of both cuitivars
decreased by the treatments with bicarbonate and high pH and the decrease in
shoot and root dry weight were greater when plants grown with bicarbonate than that
with high pH. The inhibitory effect of bicarbonate and high pH on shoot and root dry
weight of the Zn-efficient rice cultivar (S 101) was less than that of the Zn—inefficient
rice cultivar (G1?2). Root length was significantly decreased by bicarbonate and high
pH treatments for the Zn-inefficient n'ce cultivar ((3172); whereas was considerably
enhanced by bicarbonate and high pH treatments for the Zn-efficient rice
cultivar(S101), and the enhancement of root length in the Zn-efficient rice
cultivar ($101) was greater when plants grown with bicarbonate than that with high
pH. Both bicarbonate and high pH treatments increased the concentrations of
organic acids (malic. citric, fumaric and succinic) in the roots of both cultivars, but to a
greater extent for the Zn-inet'ficient than for the Zn-efficient cultivars. The results
suggest that the impairment of root growth was likely to be the initial action
of bicarbonate in inducing Zn-deficiency in low land rice, and the inhibitory effect of
bicarbonate on root growth of the Zn-inefticient cultivar might result from high
accumulation and an insufficient compartmentation of organic acids in the root cells.
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