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Differential responses of NH4- and NO3-N nutrition to Fe-deficient-stress response in sorghum cultivars

Differential responses of NH4- and NO3-N nutrition to Fe-deficient-stress response in sorghum cultivars

Proceedings of the International Congress of Plant Physiology, New Delhi, India, 15-20 February 1988 Volume 2: 1151-1155

Two Fe-chlorosis susceptible cultivars (CO-23 and CO-24) and 2 tolerant cultivars (TNS-24 and TNS-30) were examined for tolerance in solution culture. Plants were grown with either NH4-N or NO3-N (70 mg/litre). The results showed that when the Fe-stress was imposed, all cultivars except TNS-24 developed chlorosis, reduced the pH of the NH4-N medium from 6 to 3.5 and recovered. In TNS-24, there was no reduction in pH and no recovery.

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Accession: 002072802

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