Waterlogging
effects on leaf element concentrations and
cane
weight of sugarcane genotypes
S.P.
Singh1*, S. Singh1, R. Jain1, A.D. Pathak1
and N. Pandey2
1ICAR-Indian
Institute of Sugarcane Research, Lucknow-226 002, India
2Department of
Botany, University of Lucknow, Lucknow-226 007, India
*Corresponding
Author Email :
sps.nduat@gmail.com *ORCiD:
https://orcid.org/0000-0003-2787-8879
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Abstract
Aim:
The aim of the present experiment was to examine whether waterlogging induced
deficiency or excess of elements, is the cause for reduction in cane weight
of sugarcane genotypes under waterlogged conditions.
Methodology: The experiment was conducted in pots with eleven
sugarcane genotypes grown under control and waterlogged conditions.
Waterlogging treatment was imposed at 120 days crop age for a period of 60
days. Cane weight and element concentrations were measured at the end of
waterlogging.
Results:
Compared to control, reduction in cane weight of sugarcane genotypes under
waterlogging varied from 5.3% (A-46-11) to 32.3% (CoJ 64). Waterlogging caused
a significant decrease in leaf N, P, K, S, Zn and Cu concentrations of
sugarcane genotypes; the extent of decreases in leaf N and S were more and
values for these elements dropped below their reported critical deficiency
level for most genotypes. There was a significant inverse correlation between
leaf K and S concentration, and reduction in cane weight of sugarcane
genotypes, indicating that genotypes with high leaf K and S under
waterlogging have relatively less reduction in cane weight. There were significant
increase in the leaf Fe, Al, Mn and Na concentrations under waterlogging,
however, increase in these elements were not correlated with reduction in
cane weight of sugarcane genotypes.
Interpretation: The results
suggest that deficiencies of N, K and S rather than excess of Fe, Al and Mn
is a major cause for reduction in cane weight of sugarcane genotypes under
waterlogged condition. The genotypes tolerant to N, K and S deficiencies
under waterlogging can be utilized in breeding program for developing
sugarcane varieties with improved waterlogging tolerance.
Key words: Cane weight, Element deficiencies, Element
toxicities, Sugarcane, Waterlogging
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