Journal of Food, Agriculture and Environment

Interactive effects of cadmium and salinity stresses on growth and cadmium, sodium and potassium accumulation in two hybrid maize varieties

Author(s):

Selim Eker ¹*, Hatun Barut ²

Recieved Date: 2013-07-20, Accepted Date: 2013-10-22

Abstract:

This study was carried out to determine the effects of cadmium (Cd) (0 and 2 mg kg^-1 soil) and salt stress (NaCl 0 and 3000 mg kg^-1 soil) on shoot dry weights and shoot Cd, sodium (Na) and potassium (K) concentrations of salt-tolerant (Maverik) and salt-sensitive (RX-9292) hybrid maize varieties. Plants were grown under controlled greenhouse conditions for 19 days. Shoot dry matter productions and shoot Cd, Na and K concentrations were determined following the harvest. Element contents were calculated by multiplying shoot dry weights with element concentrations. Cadmium, NaCl and Cd+NaCl treatments significantly decreased (P < 0.05) shoot dry matter productions of both varieties. The decline in dry matter production was higher in RX-9292 compared to Maverik. Higher increases in Cd concentrations and contents with Cd treatments were observed in RX-9292 than that of Maverik. Combined treatments of Cd and NaCl also yielded higher Cd concentration and contents in RX-9292 compared with Maverik. The variety of RX-9292 had higher Na concentration and content than Maverik under NaCl and Cd+NaCl treatments. Cd-induced growth decline and Cd accumulations in shoots revealed that salt-sensitive RX-9292 was more sensitive to Cd compared to the salt-tolerant Maverik. Plant tolerance of Cd and salinity should definitely be known in cultural practices carried out over agricultural lands with salinity and Cd concerns.

Keywords:

Cadmium, salinity, sodium, potassium, maize

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Agriculture
Pages: 1364-1368

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