RNA sequencing of Oryza sativa japonica control and OsRALF17/19 knockout mutant in mature rice anthers
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ABSTRACT: Pollen tube growth is essential for successful fertilization and stable crop yields. We constructed loss-of-function/knock-out mutants that simultaneously target two rice genes using the CRISPR/Cas9 mutagenesis system. The selected OsRALF17 and OsRALF19 genes are strongly expressed in rice bicellular/tricellular pollen and have essential functions in the pollen tube growth. For the corresponding transcriptomic analysis, we sampled mature pollen anthers from a control group and an OsRALF17/19 knock-out mutant.
Project description:We generated single loss-of-function knockout mutants targeting a specific rice gene, Ruptured Pollen Tube (RUPO, GTrD2; LOC_Os06g03610), a member of the Catharanthus roseus RLK1-like (CrRLK1L) subfamily. RUPO is strongly expressed in mature anthers and pollen, and its knockout results in reduced pollen ROS levels and impaired pollen tube elongation, leading to germination defects. Consequently, RUPO mutants fail to produce self-fertilized seeds. This dataset comprises mature anther transcriptome data from RUPO single mutants, with samples collected from mature anthers for analysis.
Project description:We created a triple loss-of-function/knockout mutant targeting three rice genes simultaneously. The three selected genes are as follows: OsADF1 (LOC_Os02g44470), OsADF6 (LOC_Os04g46910), and OsADF9 (LOC_Os07g30090). These three ADFs are strongly transcriptional expressed in the rice mature anthers (stages 13) and bi-/tricelluler pollen. The triple mutant of these OsADFs does not produce self-fertilizing seeds due to the short length of the pollen tube (male-sterile). This data is about mature anther transcriptome data about the triple mutant of OsADFs (ADFmT). We sampled mature anther for the analysis.
Project description:We created a double loss-of-function/knockout mutant targeting three rice genes simultaneously. The two selected genes are as follows: OsABCG16 (LOC_Os06g51460), OsABCG28 (LOC_Os11g22350). These two ABCGs are strongly transcriptional expressed in the rice mature anthers (stages 13) and bi-/tricelluler pollen. The double mutant of these OsABCGs does not produce self-fertilizing seeds due to the short length of the pollen tube inside the pistil (male-sterile). This data is about mature anther transcriptome data about the double mutant of OsABCGs. We sampled mature anther for the analysis.
Project description:We generated single loss-of-function knockout mutant targeting a specific rice gene, GTrD5; LOC_Os11g20384), a member of the Suppressor of Actin 1 (Sac1) domain phosphoinositide phosphatase subfamily. GTrD5 is strongly expressed in mature anthers and pollen, and its knockout results in germination defects. Consequently, GTrD5 mutants have reduced self-fertilized seed production. This dataset comprises mature anther transcriptome data from GTrD5 single mutants, with samples collected from mature anthers for analysis.
Project description:We created a double loss-of-function/knockout mutant targeting two rice genes simultaneously. The selected genes are as follows: OsCNGC4(LOC_Os03g44440) and OsCNGC5(LOC_Os12g28260). These two CNGCs are strongly transcriptional expressed in the rice mature anthers (stages 13-14). The mutant of these OsCNGC4/5 displayed a low seed-setting rate. This data refers to the transcriptome of mature anthers from the double mutant of OsCNGC4 and OsCNGC5. We sampled mature anther for the analysis.
Project description:Rice anthers at anthesis stage from the wild type and osrac6-1 mutant anther (Dongjin cultivar) We collected the sample from our field and immediately froze the samples with liquid nitrogen.
Project description:Soil salinity is a major production constrain for agricultural crops, especially in Oryza sativa (rice). Analyzing physiological effect and molecular mechanism under salt stress is key for developing stress-tolerant plants. Roots system has a major role in coping with the osmotic change impacted by salinity and few salt-stress-related transcriptome studies in rice have been previously reported. However, transcriptome data sets using rice roots grown in soil condition are more relevant for further applications, but have not yet been available. The present work analyzed rice root and shoot physiological characteristics in response to salt stress using 250 mM NaCl for different timepoints. Subsequently, we identified that 5 day treatment is critical timepoint for stress response in the specific experimental design. We then generated RNA-Seq-based transcriptome data set with rice roots treated with 250 mM NaCl for 5 days along with untreated controls in soil condition using rice japonica cultivar Chilbo. We identified 447 upregulated genes under salt stress with more than fourfold changes (p value < 0.05, FDR < 0.05) and used qRT-PCR for six genes to confirm their salt-dependent induction patterns. GO-enrichment analysis indicated that carbohydrate and amino-acid metabolic process are significantly affected by the salt stress. MapMan overview analysis indicated that secondary metabolite-related genes are induced under salt stress. Metabolites profiling analysis confirmed that phenolics and flavonoids accumulate in root under salt stress. We further constructed a functional network consisting of regulatory genes based on predicted protein–protein interactions, suggesting useful regulatory molecular network for future applications.
Project description:- Pollen tube growth is important process for successful double fertilization, which is critical for grain yield in crop plants. Despite much progress in identification of rapid alkalization factors (RALFs) which serve as ligand for signaling transduction during fertilization in Arabidopsis, there is no functional study of RALF in mono-cotyledon plant. - We functionally characterized two pollen specific RALF in rice (Oryza sativa) using multiple CRISPR/Cas9 induced loss-of-function mutants, peptide treatment, expression analyses, tag reporter lines. - OsRALF17 is specifically expressed in pollen and pollen tube as the strongest level among 41 RALF members in rice. Exogenously applied OsRALF17 inhibits pollen tube germination and elongation at high concentration, but enhances tube elongation at low concentration, indicating the regulation of growth balance. Double mutant of OsRALF17 with OsRALF19 exhibit almost male sterile, with defect on pollen germination and tube elongation. - Our study revealed that functionally-redundant OsRALF17 and 19 peptides binds to the OsMTD2, CrRLK1L family member, and transmits ROS signal for pollen tube germination and integrity maintenance in rice. We provide new insights into the role of RALF and expanding our understanding of the biological role of RALF in regulating rice fertilization.
Project description:Protein lysine acetylation (KAC) is a dynamic and reversible post-translational modification, playing important biological roles in many organisms.Here, we reported results from a proteomic investigation to detect KAC status of the developing rice anthers near the time of meiosis (RAM), providing strong biochemical evidence for roles of many KAC-affected proteins during rice anther development and meiosis. We identified a total of 1,354 KAC sites in 676 proteins.
Project description:Illumina sequencing was employed to examine the expression profiles of rice anther miRNAs from the a non-pollen male sterile line Wuxiang S (WXS), one of photo-thermo sensitive genical male sterile (PTGMS) line rice, during in the fertility transition stage. A total of 493 known miRNAs and 273 novel miRNAs were identified during rice anther development. Based on the number of sequencing reads, a total of 26 miRNAs were discovered to be significant difference expression between WXS(S, Sterility) and WXS(F, Fertility), and the results were partially validated by qRT-PCR. Among these, 11 miRNAs were decreased and 15 miRNAs were increased in WXS(S) compared with WXS(F). The expression patterns for targets of osa-miR156a-j, osa-miR3879, osa-miR159c/d/e, osa-miR171a/c/e/i, osa-miR398b, osa-miR164d, osa-miR528 and osa-miR408 were selectively examined, and the results showed that there was a negative correlation on the expression patterns between miRNAs and their targets. These targets have previously been reported to be related with pollen development and male sterility, suggesting that miRNAs might act as regulators of rice anthers. Furthermore, miRNA editing events were observed. The U-to-C and U-to-A editing phenomenon was validated by molecular cloning and sequencing. Examine small RNA profiles change of four tissues of the rice non-pollen male sterile line Wuxiang S under two different environments.