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Salts in the root zone affect NO3--N losses from wheat root in light: Influence of genotype and darkness


Salts in the root zone affect NO3--N losses from wheat root in light: Influence of genotype and darkness



Cereal Research Communications 28(4): 379-386



ISSN/ISBN: 0133-3720

The influence of salts, light and darkness on root NO3--N loss has been studied on four varieties of Moroccan wheat (Triticum aestivum L. var. Achtar, Saada, Saba and Tegyey32). In light, NO3--N losses in water were relatively similar in all varieties. Salts in light reduced nitrate loss from roots of Achtar, Saada and Tegyey32, and increased from roots of Saba, as compared to water, during 8 h. In the dark, salts reduced nitrate loss from roots of Achtar during 8 h, but increased from roots of Saada (6 h), Saba (8 h) and Tegyey32 (4 h) as compared to water. Salts in the dark increase nitrate losses relative to light in Saada, and Tegyey32 (8 h), in Saba (for 2 h) and in Achtar (after 6 h). On the other hand, the increasing effect of water developed slowly in the dark period for all varieties as compared to light. Our result suggests the existence of genetic variability in the relation between salts and nitrate loss which depends on light. In this study, the varietal differences in the root losses of NO3--N are discussed.

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Accession: 011323453

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