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Transcriptomics of lateral root initiation in Maize

ABSTRACT: We developed a method to synchronize the induction of lateral roots in primary and adventitious roots of Zea mays, and used it to perform a genome-wide transcriptome analysis of the pericycle cells in front of the phloem poles during lateral root initiation.

ORGANISM(S): Zea mays

PROVIDER: GSE45691 | GEO | 2013/07/16

SECONDARY ACCESSION(S): PRJNA195912

REPOSITORIES: GEO

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Transcriptomics of lateral root initiation in Maize

Project description:We developed a method to synchronize the induction of lateral roots in primary and adventitious roots of Zea mays, and used it to perform a genome-wide transcriptome analysis of the pericycle cells in front of the phloem poles during lateral root initiation. Lateral roots were induced in primary and adventitious roots of Maize. For the primary root, plants were germinated and grown 64 hours in NPA 50 ÂµM, and then transfered to NAA 50 ÂµM. For the adventitious roots, plants were germinated and grown in water for 6 days, then tranfered 4 days in NPA 25 ÂµM, and finally transfered to NAA 25 ÂµM. For all these roots, pericycle cells located in front of the phloem poles in segments of roots located between 5 and 10 mm distance from the root tip were isolated using laser capture microdissection after cryosection. Material was sampled at 0 hours (NPA) and after 2, 3 and 4 hours of NAA treatment, for both the primary and adventitious roots and also after 6 hours and 9 hours of NAA treatment for the adventitious roots.

2013-07-16 | E-GEOD-45691 | biostudies-arrayexpress

Transcriptome response of maize (B73) shoot-borne root stele to local high nitrate stimulation

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The maize genome encodes novel members of the purple acid phosphatase (PAP) subgroup Ia

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Arabidopsis transcriptional profile in response to chromate (K2CrO4)

Project description:Transcriptional profiling of Arabidopsis thalina seedlings in response to high (140 µM) and low (20 µM) concentrations of chromate (K2CrO4). Low concentrations of chromate (e.g. 40 µM) promoted primary root growth, while high concentrations (e.g. 140 µM) repressed growth and increased formation of root hairs, lateral roots and adventitious roots.

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Identification of auxin and cytokinin cross-talk components involved in lateral root initiation

Project description:Genome wide transcriptome profiling of pericycle cells from roots exposed to auxin, cytokinin and both hormones simultaneously. Lateral root organogenesis in Arabidopsis is governed by a complex network of hormonal regulations. Plant hormones auxin and cytokinin were demonstrated to be the key regulators of this lateral root organogenesis and their mode of interaction is antagonistic. The aim of the project is to understand the role of the auxin - cytokinin signalling pathways in lateral root organogenesis.

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Zea mays B73 corn-leaf aphids feeding time-course raw sequence reads

Project description:As a response to insect attack, maize (Zea mays) has inducible defenses that involve large changes in gene expression and metabolism. Piercing/sucking insects such as corn leaf aphids (Rhopalosiphum maidis) cause direct damage by acquiring phloem nutrients as well as indirect damage through the transmission of plant viruses. To elucidate the metabolic processes and gene expression changes involved in maize responses to aphid attack, leaves of inbred line B73 were infested with R. maidis for two to 96 hours.

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Zea mays Transcriptome or Gene expression

Project description:In this study RNA-sequencing was used to monitor gene expression changes in four tissues (meristematic zone, elongation zone, and cortex and stele of the mature zone) of maize (Zea mays L.) primary roots in response to water deficit to gain a better understanding of the mechanisms underlying drought tolerance.

2015-10-08 | E-MTAB-4297 | biostudies-arrayexpress

RNA-Seq analysis of adventitious rooting zone of Arabis alpina main stem during extended cold exposure.

Project description:Arctic alpine species experience extended periods of cold and unpredictable conditions during flowering. Thus, often, alpine plants use both sexual and asexual means of reproduction to maximise fitness and ensure reproductive success. We used the arctic alpine perennial Arabis alpina to explore the role of prolonged cold exposure on adventitious rooting. We exposed plants to 4 °C for different durations and scored the presence of adventitious roots on the main stem and axillary branches. Our physiological studies demonstrated the presence of adventitious roots after 21 weeks at 4 °C saturating the effect of cold on this process. Notably, adventitious roots on the main stem developingin specific internodes allowed us to identify the gene regulatory network involved in the formation of adventitious roots in cold using transcriptomics. These data and histological studies indicated that adventitious roots in A. alpina stems initiate during cold exposure and emerge after plants experience growth promoting conditions. While the initiation of adventitious root was not associated with changes of DR5 auxin response and free endogenous auxin level in the stems, the emergence of the adventitious root primordia was. Using the transcriptomic data, we discerned the sequential hormone responses occurring in various stages of adventitious root formation and identified supplementary pathways putatively involved in adventitious root emergence, such as glucosinolate metabolism. Together, our results highlight the role of low temperature during clonal growth in alpine plants and provide insights on the molecular mechanisms involved at distinct stages of adventitious rooting.

2024-04-01 | GSE176054 | GEO

Arabidopsis transcriptional profile in response to chromate (K2CrO4)

Project description:Transcriptional profiling of Arabidopsis thalina seedlings in response to high (140 M-BM-5M) and low (20 M-BM-5M) concentrations of chromate (K2CrO4). Low concentrations of chromate (e.g. 40 M-BM-5M) promoted primary root growth, while high concentrations (e.g. 140 M-BM-5M) repressed growth and increased formation of root hairs, lateral roots and adventitious roots. Three-condition experiment, high (140 M-BM-5M) and low (20 M-BM-5M) concentrations of chromate (K2CrO4) vs non-chromate added (Control). Four biological replicates, one replicate per array.

2013-02-21 | E-GEOD-44324 | biostudies-arrayexpress

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