Abstract
Deciphering molecular mechanisms vital for identifying key genes associated with high grain Zn in rice. Rice adapted complex strategies for the acquisition of Zn from the rhizosphere, its uptake by roots, its transport from root to shoot, and its movement in shoots, nodes, and leaves to the meristematic tissues and grain. Zn metabolic processes are regulated temporally and spatially by several genes. A few major gene families, viz., zinc-iron regulated proteins, heavy metal ATPases phytosiderophores like nicotinamide, and Yellow Stripe-Like transporters, natural resistance-associated macrophage proteins, and metal tolerance proteins associated with Zn uptake in rice have been characterized. Here, we review recent developments in understanding the molecular mechanism of Zn metabolism in rice and its implications in the development of Zn-biofortified rice varieties.
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