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Differential expression of genes in shoot samples of rice seedlings with contrasting response under low nitrogen

ABSTRACT: Differential expression of genes in shoot samples of rice seedlings with contrasting response under low nitrogen

PROVIDER: PRJNA681396 | ENA |

REPOSITORIES: ENA

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Differential expression of genes in shoot samples of rice seedlings with contrasting response under low nitrogen

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Differential expression of genes in roots of rice seedlings with contrasting response under low nitrogen

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TMT-based Comparative Peptidomic Analysis of Rice Seedlings under Salt Stress

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Proteome analysis of contrasting rice genotypes under phosphorus-starvation stress

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

Project description: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.

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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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Photoreceptor control of shoot meristem activity and leaf initiation

Project description:When Arabidopsis seedlings are grown in the dark, their shoot meristem remains in a repressed state and does not develop leaves. The tight control of leaf development by light provides the opportunity to analyse a fundamental plant developmental process in its very early stages. We have observed that activation of photoreceptors in dark-grown seedlings leads to a rapid and dramatic increase in mitotic activity in and around the shoot meristem. Cotyledons also exhibit an induction of cell cycle activity by light, but this consists of endoreduplication and occurs later. Many other processes take place upon induction by light, including the development of the photosynthetic apparatus and the synthesis of sunscreens, but these processes are expected to take place in both the leaf primordia and the cotyledons. We have used this information to carry out a whole transcriptome analysis of shoot meristem activation and early stages of leaf development by light. For this we dissected the shoot apical regions from seedlings grown in the dark or 1, 2, 6, 24, 48 or 72 h after transfer to light. We also dissected cotyledons from equivalent seedlings grown in the dark or 1 or 6 h after transfer to light. From these samples we obtained RNA used for hybridisations against the ATH1 GenChip.

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Transcriptome Analysis of Wounding-Induced Root to Shoot Communication in Arabidopsis thaliana.

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