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Microarray expression data for iron and zinc stresses in maize

ABSTRACT: Microarray expression data for iron and zinc stresses in maize

PROVIDER: PRJNA505662 | ENA |

REPOSITORIES: ENA

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Microarray expression data for iron and zinc stresses in maize

Project description:Elucidation of molecular basis of Iron and zinc homeostasis is crucial to breed iron and zinc use efficient and iron -zinc biofortified maize cultivars. The present investigation was framed to decipher the global expression snapshot maize seedlings in response to iron and zinc starvtion. Genome-wide transcriptome assay was performed with ~18,000 transcripts distributed across the maize genome, in maize seedlings after exposing the seedlings to three Fe and Zn stress treatments (+Fe–Zn, –Fe+Zn, –Fe–Zn) along with control (+Fe+Zn). Microarrays were used to study the global gene expression pattern iron and zinc starvation responsive genes in maize.

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Project description:Intercropping is a vital technology in resource-limited agricultural systems with low inputs. Peanut/maize intercropping enhances iron (Fe) nutrition in calcareous soil. Proteomic studies of the differences in peanut leaves, maize leaves and maize roots between intercropping and monocropping systems indicated that peanut/maize intercropping not only improves Fe availability in the rhizosphere but also influences the levels of proteins related to carbon and nitrogen metabolism. Moreover, intercropping may enhance stress resistance in the peanut plant (Xiong et al. 2013b). Although the mechanism and molecular ecological significance of peanut/maize intercropping have been investigated, little is known about the genes and/or gene products in peanut and maize roots that mediate the benefits of intercropping. In the present study, we investigated the transcriptomes of maize roots grown in intercropping and monocropping systems by microarray analysis. The results enabled exploration differentially expressed genes in intercropped maize. Peanut (Arachis hypogaea L. cv. Luhua14) and maize (Zea mays L. cv. Nongda108) seeds were grown in calcareous sandy soil in a greenhouse. The soil was enhanced with basal fertilizers [composition (mg·kg−1 soil): N, 100 (Ca (NO3)2·4H2O); P, 150 (KH2PO4); K, 100 (KCl); Mg, 50 (MgSO4·7H2O); Cu, 5 (CuSO4·5H2O); and Zn, 5 (ZnSO4·7H2O)]. The experiment consisted of three cropping treatments: peanut monocropping, maize monocropping and intercropping of peanut and maize. After germination of peanut for 10 days, maize was sown. Maize samples were harvested after 63 days of growth of peanut plants based on the degree of Fe chlorosis in the leaves of monocropped peanut. The leaves of monocropped peanut plants exhibited symptoms of Fe-deficiency chlorosis at 63 days, while the leaves of peanut plants intercropped with maize maintained a green color.

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