Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling of Arabidopsis Col-0, ARF10 and mARF10 plants to identify genes regulated by ARF10 in germinating seeds

ABSTRACT: The expression profiles were determined using Affymetrix ATH1 arrays. Comparisons among the Col-0, ARF10 and mARF10 sample groups allow the identification of genes regulated by ARF10. Experiment Overall Design: Germinating seeds (22 hr imbibition) from three independent biological replicates of Col-0, ARF10 and mARF10 samples, which contain three independent seed lots each, were analyzed.

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Hiro Nonogaki

PROVIDER: E-GEOD-7227 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Repression of AUXIN RESPONSE FACTOR10 by microRNA160 is critical for seed germination and post-germination stages.

Liu Po-Pu PP Montgomery Taiowa A TA Fahlgren Noah N Kasschau Kristin D KD Nonogaki Hiroyuki H Carrington James C JC

The Plant journal : for cell and molecular biology 20070802 1

AUXIN RESPONSE FACTORS (ARFs) are transcription factors involved in auxin signal transduction during many stages of plant growth development. ARF10, ARF16 and ARF17 are targeted by microRNA160 (miR160) in Arabidopsis thaliana. Here, we show that negative regulation of ARF10 by miR160 plays important roles in seed germination and post-germination. Transgenic plants expressing an miR160-resistant form of ARF10, which has silent mutations in the miRNA target site (termed mARF10), exhibited developm ...[more]

PMID: 17672844

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Project description:In sexual reproduction, a proper communication and cooperation between male and female organs and tissue are essential for male and female gametes to unite. In flowering plants, female sporophytic tissues and gametophyte direct a male pollen tube towards an egg apparatus, which consists of an egg cell and two synergid cells. The cell-cell communication between the pollen tube and the egg apparatus, such as the reception of a signal from the egg apparatus at the pollen tube, makes the tip of pollen tube rapture to release the sperm cell. To isolate male factors involved in the interaction between a pollen tube and an egg apparatus, we focused on receptor-like kinases (RLKs), which are extensively diversified in the flowering plant lineage to comprise a large monophyletic gene family. Approximately 620 members were found in the Arabidopsis thaliana genome. Expression patterns of 558 RLKs were analyzed using an Affymetrix ATH1 microarray of A. thaliana. We focused on two RLKs, ANXUR1 (ANX1) and ANXUR2 (ANX2), and characterized their function. Here we report that pollen tubes of anx1/anx2 ruptured before arriving at the egg apparatus, suggesting that ANX1 and ANX2 are male factors controlling pollen tube behavior with directing rupture at proper timing. Furthermore, ANX1 and ANX2 were the most closely related paralogs to a female factor FERONIA/SIRENE controlling pollen tube behavior expressed in synergid cells. Our finding shows that the coordinated behaviors of female and male reproductive apparatuses are regulated by the sister genes, whose duplication might play a role in the evolution of fertilization system in flowering plants. Experiment Overall Design: Arabidopsis thaliana Col-0 was grown at 18Â°C for 8 hr in the dark and at 22Â°C for 16 hr in the light. To collect germinated pollen with pollen tubes, opened flowers were touched to cellophane layered on the pollen germination medium containing 13.5% sucrose, 10 mM CaCl2, 0.4 mM boric acid, 1 mM KCl, 0.001% myo-inositol, and 0.6% agarose. The released pollen was incubated at 25Â°C for 6 hr in the dark. For collection of seedlings, seeds were sown on Murashige-Skoog medium containing 1x Murashige and Skoog Plant Salt Mixture (Wako), 1x Gamborgâs vitamin solution (Wako), 1% sucrose, and 0.8% agar. Seedlings including roots with one or two rosette leaves were collected for RNA extraction. RNA was extracted with Isogene (Nippon Gene), precipitated with LiCl, and further purified with RNeasy. The ATH1 genechip (Affymetrix) was used for expression analysis using 10 Âµg each of total RNA following the manufacturer's instructions. Array data were processed and analyzed with the GCOS1.2 program (Affymetrix) and Excel 2004 (Microsoft). Hybridization with germinating pollen RNA was duplicated and the results were compared to that with seedling RNA.

Dataset Information

Transcription profiling of Arabidopsis Col-0, ARF10 and mARF10 plants to identify genes regulated by ARF10 in germinating seeds

Publications

Repression of AUXIN RESPONSE FACTOR10 by microRNA160 is critical for seed germination and post-germination stages.

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