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Gene expression profile of rice shoot in response to nitrogen deficiency condition

ABSTRACT: Nitrogen (N) are pivotal element for proper plant growth and development. We performed microarray analysis of rice shoot under nitrogen deficiency (-N) to obtain a global view of gene regulations associated with plant response to -N.

ORGANISM(S): Oryza sativa Oryza sativa Japonica Group

PROVIDER: GSE73772 | GEO | 2019/10/06

REPOSITORIES: GEO

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Gene expression profile of rice shoot and root in response to nitrogen deficiency treatment under phosphorus deficiency condition.

Project description:Nitrogen (N) and phosphorus (P) are pivotal element for proper plant growth and development. We performed microarray analysis of rice shoot and root after nitrogen deficiency (-N) treatment under phosphorus deficiency (-P) condition to obtain a global view of gene regulations associated with plant response to -N under -P condition.

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Gene expression profile of rice shoot in response to macronutrient deficiency

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Gene expression profile of rice shoot in response to macronutrient deficiency

Project description:Macronutrients are pivotal elements for proper plant growth and development. We performed microarray analysis of rice shoot under nitrogen (N), phosphorus (P), and potassium (K) deficiency conditions to obtain a global view of gene regulations associated with plant response to essential nutrients. We performed microarray analysis of rice shoot under N, P and K deficiency conditions (1/4, 1/16 and 1/64 of normal concentration) and control for each nutrient. We collected a total of 36 microarray data corresponding to 12 samples with 3 replicates.

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Shoot-to-root mobile CEPD-like 2 integrates shoot nitrogen status to systemically regulate nitrate uptake in Arabidopsis

Project description:Plants modulate the efficiency of root nitrogen (N) acquisition in response to shoot N demand. However, molecular components directly involved in this shoot-to-root communication remain to be identified. Here, we show that phloem-mobile CEPD-like 2 (CEPDL2) polypeptide is upregulated in the leaf vasculature in response to decreased shoot N status and, after translocation to the roots, promotes high-affinity uptake and root-to-shoot transport of nitrate by activating nitrate transporter genes such as NRT2.1, NRT3.1 and NRT1.5. Loss of CEPDL2 decreases nitrate uptake and root-to-shoot transport activity in roots, leading to a reduction in shoot nitrate content and plant biomass. CEPDL2 contributes to N acquisition cooperatively with CEPD1 and CEPD2 that mediate root N status, and their complete loss severely impairs N homeostasis in plants. Reciprocal grafting analysis provided conclusive evidence that the shoot CEPDL2/CEPD genotype defines the root high-affinity uptake activity of nitrate. Our results indicate that plants integrate shoot N status and root N status in leaves and systemically regulate the efficiency of root N acquisition.

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