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Figure 8 | BMC Plant Biology

Figure 8

From: Iron deficiency affects nitrogen metabolism in cucumber (Cucumis sativusL.) plants

Figure 8

Schematic representation of nitrogen metabolism changes occurring in Fe-deficient cucumber plants. Orange arrows indicate the specific process investigate in this work, while the arrow thickness indicates an up- or down-activation of enzymatic activities. Red arrow indicates the possible recycle of protein and aa occurring under Fe deficiency in cucumber plants. Since NO3- assimilation (NR activity) decreases and GS/GOGAT cycle increases in both root and leaf, the source of ammonia might come from a recycling of aa deriving from protein degradation [9]as suggested in ). The aa might be partially translocated to the leaf sustaining its metabolism as supported by data presented in this work (Figures 5 and 7).

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