منابع مشابه
Nicotianamine in zinc and iron homeostasis.
Transition metals such as Fe, Zn, and Cu are essential to plants but toxic in excess, and their accumulation is tightly regulated (Palmer and Guerinot, 2009). Offering exciting possibilities for applications such as bioremediation of contaminated sites and biofortification against nutritional deficiencies (e.g., of Zn; Palmgren et al., 2008), the molecular mechanisms of metal homeostasis are be...
متن کاملNicotianamine synthase overexpression positively modulates iron homeostasis-related genes in high iron rice
Nearly one-third of the world population, mostly women and children, suffer from iron malnutrition and its consequences, such as anemia or impaired mental development. Biofortification of rice, which is a staple crop for nearly half of the world's population, can significantly contribute in alleviating iron deficiency. NFP rice (transgenic rice expressing nicotianamine synthase, ferritin and ph...
متن کاملVacuolar nicotianamine has critical and distinct roles under iron deficiency and for zinc sequestration in Arabidopsis.
The essential micronutrients Fe and Zn often limit plant growth but are toxic in excess. Arabidopsis thaliana ZINC-INDUCED FACILITATOR1 (ZIF1) is a vacuolar membrane major facilitator superfamily protein required for basal Zn tolerance. Here, we show that overexpression of ZIF1 enhances the partitioning into vacuoles of the low molecular mass metal chelator nicotianamine and leads to pronounced...
متن کاملNicotianamine secretion for zinc excess tolerance.
Plants acquire micronutrients such as iron (Fe), zinc (Zn), manganese, or copper from soil. These micronutrients are often not readily available and they need to be mobilized to the proper free ionic form in order to be taken up by plant roots. Perhaps the only exception to this is the uptake of Fe by grasses, which have evolved a so-called strategy II uptake mechanism that involves the secreti...
متن کاملHomeostasis of zinc and iron in mouse B16 melanoma.
a subcutaneous implantation of maccrated tumor bits (mela noma B16) into the right axillary region by a Becton Dickin son BD13 needle. Tumor growth was divided into three periods, according to tumor size. Using 65 Zn and 59 Fe, the homeostasis of zinc and iron in mice with melanomas was studied at 5†" 6days (unde tectable tumor), 10 days (medium-size tumor), and 18†" 20 days (large-size tum...
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ژورنال
عنوان ژورنال: The Plant Cell
سال: 2012
ISSN: 1040-4651,1532-298X
DOI: 10.1105/tpc.112.240212