Iron is an essential nutrient for plant metabolism such that Fe-limited plants display chlorosis and suffer from reduced photosynthetic efficiency. Differential display previously identified genes whose expression was elevated in Fe-deficient maize roots. Here, we describe the functional characterization of one of the genes identified in the screen, ZmFDR3 (Zea maize Fe-deficiency-related). Heterologous functional complementation assays using a yeast iron uptake mutant showed that ZmFDR3 functions in iron transport. ZmFDR3 contains a domain found in FliN-proteins of the type III secretion system and is predicted to localize to the thylakoid of plastids. Fluorescence immunocytochemistry showed that ZmFDR3 is localized in the plastids of roots, stems and leaves, with high expression found in guard cell chloroplasts. Transgenic tobacco expressing a 35S-ZmFDR3 construct contains elevated iron content, displays well arranged thylakoid membranes and has photosynthetic indices that are higher than those of the wild type. Together, these results suggest that ZmFDR3 functions in chloroplast iron transport.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s11427-009-0108-2 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Chronic environmental exposure to polystyrene microplastics increases the risk of nonalcoholic fatty liver disease.
Toxicology
January 2025
Yangzhou University Medical College, Yangzhou University, Yangzhou, Jiangsu Province 225009, China; Jiangsu Key Laboratory of Non coding RNA Basic and Clinical Transformation, Yangzhou University, Yangzhou, Jiangsu Province 225009, China. Electronic address:
Microplastics (MPs), as the crucial environmental pollutants, can be easily transported into the human body and accumulate in the liver. However, current studies mainly focus on acute exposure to MPs, investigations on long-term interactions with MPs alone remain limited. Thereby, we examined noxious properties of MPs and selected the most common polystyrene (PS) MPs as the research object, including unmodified PS MPs (PS-MPs) and positive-charged PS MPs (PS-NH) at 10 mg/L employing oral drinking water methods in mice for six consecutive months in vivo.
View Article and Find Full Text PDFTARGETING LUNG HEME IRON BY AEROSOL HEMOPEXIN ADMINSTRATION IN SICKLE CELL DISEASE PULMONARY HYPERTENSION.
Free Radic Biol Med
January 2025
University of Colorado, Anschutz Medical Campus School of Medicine| Translational research laboratory of Red Blood Cell Diseases and Hypoxia related illnesses| Cardiovascular Pulmonary Research (CVP) group, Pediatrics. Electronic address:
Lung tissue from human patients and murine models of sickle cell disease pulmonary hypertension (SCD-PH) show perivascular regions with excessive iron accumulation. The iron accumulation arises from chronic hemolysis and extravasation of hemoglobin (Hb) into the lung adventitial spaces, where it is linked to nitric oxide depletion, oxidative stress, inflammation, and tissue hypoxia, which collectively drive SCD-PH. Here, we tested the hypothesis that intrapulmonary delivery of hemopexin (Hpx) to the deep lung is effective at scavenging heme-iron and attenuating the progression of SCD-PH.
View Article and Find Full Text PDFBiomonitoring of the Paraopeba river: Cytotoxic, genotoxic and metal concentration analysis three years after the Brumadinho dam rupture - Minas Gerais, Brazil.
Sci Total Environ
January 2025
Laboratório de Análises Genéticas, Departamento de Ciências Naturais e da Terra, Universidade do Estado de Minas Gerais, Divinópolis, MG 35501-170, Brazil. Electronic address:
The rupture of Vale S.A. mining tailings dam in Brumadinho, Brazil, in January 2019 had significant environmental impacts on the Paraopeba River basin.
View Article and Find Full Text PDFAerogels Based on Chitosan and Collagen Modified with FeO and FeO Nanoparticles: Fabrication and Characterization.
Polymers (Basel)
January 2025
Department of Engineering and Materials Science and Transportation, University of Seville, 41092 Seville, Spain.
The necessity to mitigate the intrinsic issues associated with tissue or organ transplants, in order to address the rising prevalence of diseases attributable to increased life expectancy, provides a rationale for the pursuit of innovation in the field of biomaterials. Specifically, biopolymeric aerogels represent a significant advancement in the field of tissue engineering, offering a promising solution for the formation of temporary porous matrices that can replace damaged tissues. However, the functional characteristics of these materials are inadequate, necessitating the implementation of matrix reinforcement methods to enhance their performance.
View Article and Find Full Text PDFInvestigation of Crack Propagation in Locally Thermal-Treated Cast Iron.
Materials (Basel)
January 2025
Department of Transport Engineering, Faculty of Mechanical Engineering and Design, Kaunas University of Technology, 44249 Kaunas, Lithuania.
Cyclic failure problems in layered ductile iron are evident in a wide range of elements in transportation and mining equipment and depend on production technology and operating conditions. The aim of this study was to analyze the effect of residual stresses on the behavior of cyclic and static failure. The stress intensity factor, crack initiation, propagation patterns, static tension diagrams, and fracture behavior of compact tension (CT) specimens were determined.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!