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Re-establishment of desiccation tolerance in protruded radicles of Medicago truncatula Wt and abi5 seeds

ABSTRACT: Desiccation tolerance (DT) is the capacity to withstand total loss of cellular water. This property is acquired during seed filling and lost just after germination. However, in many species, a germinated seed can regain DT under adverse conditions such as osmotic stress. We discovered that the germinated seeds of the abscisic acid insensitive 5 (Mtabi5) mutant of Medicago truncatula lost their ability to re-establish DT during osmotic stress. To characterize the molecular processes that are influenced by MtABI5 during the re-establishment of DT tolerance, a transcriptome analysis was performed on the protruded radicles of germinated Mtabi5 mutants and wilt type before and after an osmotic treatment. Six-condition experiment, R108_T versus R108_P, abi5-1_T versus abi5-1_P, abi5-2_T versus abi5-2_P. Biological replicates: 9 controls (R108-T, abi5-1_T, abi5-2_T), 9 treatments (R108-P, abi5-1_P, abi5-2_P), independently grown and harvested. One replicate per array.

ORGANISM(S): Medicago truncatula

SUBMITTER: Sandra Pelletier

PROVIDER: E-GEOD-51830 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Re-establishment of desiccation tolerance in protruded radicles of Medicago truncatula Wt and abi5 seeds

Project description:Desiccation tolerance (DT) is the capacity to withstand total loss of cellular water. This property is acquired during seed filling and lost just after germination. However, in many species, a germinated seed can regain DT under adverse conditions such as osmotic stress. We discovered that the germinated seeds of the abscisic acid insensitive 5 (Mtabi5) mutant of Medicago truncatula lost their ability to re-establish DT during osmotic stress. To characterize the molecular processes that are influenced by MtABI5 during the re-establishment of DT tolerance, a transcriptome analysis was performed on the protruded radicles of germinated Mtabi5 mutants and wilt type before and after an osmotic treatment.

2013-10-30 | GSE51830 | GEO

Transcriptome of Medicago truncatula abi5 mutants during seed development

Project description:A transcriptome analysis of developing abi5 and wild type (R108) seeds from Medicago truncatula was performed to decipher the role of ABI54 in the regulation of late seed maturation and seed longevity.

2016-09-24 | GSE87313 | GEO

Genome-wide analysis of desiccation tolerance-related genes in Arabidopsis seeds

Project description:The combination of robust physiological models with “omics” studies holds promise for the discovery of genes and pathways linked to how organisms deal with drying. Here we used a transcriptomics approach in combination with an in vivo physiological model of re-establishment of desiccation tolerance (DT) in Arabidopsis thaliana seeds. We show that the incubation of desiccation-sensitive (DS) germinated Arabidopsis seeds in a polyethylene glycol (PEG) solution re-induces the mechanisms necessary for expression of DT. Based on a SNP-tile array gene expression profile, our data indicates that the re-establishment of DT, in this system, is related to a programmed reversion from a metabolic active to a quiescent state similar to prior to germination. Our findings show that transcripts of germinated seeds after the PEG treatment are dominated by those encoding LEA, seed storage and dormancy-related proteins. On the other hand, a massive repression of genes belonging to many other classes such as photosynthesis, cell wall modification and energy metabolism occurs in parallel. Furthermore, comparison with a similar system for Medicago truncatula reveals a significant overlap between the two transcriptomes. Such overlap may highlight core mechanisms and key regulators of the trait DT. Taking into account the availability of the many genetic and molecular resources for Arabidopsis, the described system may prove useful for unraveling DT in higher plants. Desiccation-sensitive seeds vs. desiccation-tolerant seeds in the same developmental stage in triplicate.

2013-06-21 | E-GEOD-30853 | biostudies-arrayexpress

Transcription profiling of Medicago truncatula Mt TTG1 mutant seed

Project description:Medicago truncatula Tnt-1 insertional mutant for MtTTG1 gene (NF977) versus the wild-type R108. The seed samples are harvested at 16 days after pollination. Their transcript profiles were compared.

2009-08-14 | E-MEXP-1757 | biostudies-arrayexpress

Seed comparative genomics in three coffee species evidence desiccation tolerance mechanisms among intermediate seeds

Project description:In contrast to the desiccation tolerant (DT) ‘orthodox’ seeds, the so-called ‘intermediate’ seeds cannot survive complete drying and are short-lived. All species of the genus Coffea produce intermediate seeds but show a considerable variability for the seed DT level, which may help to decipher the molecular basis of seed DT in plants. We thus led a comparative transcriptome analysis of developing seeds in three coffee species with contrasting seed DT levels. Seeds of all species shared a major transcriptional switch during late maturation that governs a general slow-down of metabolism. However, numerous key stress-related genes, including those coding for the late embryogenesis abundant protein EM6 and the osmosensitive calcium channel ERD4, were upregulated during DT acquisition in the two species with high seed DT, C. arabica and C. eugenioides. By contrast, an upregulation of numerous players of the metabolism, transport and perception of auxin was observed in C. canephora seeds with low DT. Moreover, species with high DT showed a stronger down-regulation of the mitochondrial machinery dedicated to the tricarboxylic acid cycle and oxidative phosphorylation. Accordingly, respiration measurements during seed dehydration demonstrated that intermediate seeds with the highest DT levels are better prepared to cease respiration and avoid oxidative stresses.

2020-05-26 | PXD015806 | Pride

Next-Generation Sequencing Facilitates Quantitative Analysis of Wild Type and abi5 Transcriptomes

Project description:It has been known that ABA INSENSITIVE 5 (ABI5) plays a vital role in regulating seed germination. In the present experiment, we showed that 3-amino-1,2,4-triazole (3-AT) inhibits seed germination of the loss-of-function mutant abi5-1, but promotes seed germination of the ABI5-overexpression transgenic line, and that ABI5 affects reactive oxygen species (ROS) homeostasis. RNA-sequencing analysis indicates that the transcription of the genes involved in ROS metabolic process or genes responsive to ROS stress is impaired in abi5-1 seeds. Together, all the findings suggest that ABI5 regulates seed germination at least partly by affecting ROS homeostasis.

2017-07-11 | GSE90004 | GEO

Influence of osmopriming on rape seeds germination

Project description:Transcriptomic study of the impact of osmopriming on rape seeds (Brassica napus L.; cv 'Libomir') during priming process and after germination. The assays were replicated twice on two independent priming and germination experiments. Seeds were osmoprimed in PEG solution (-1.2 MPa osmotic potential) during 7 days, dried to initial moisture content and then germinated for 7 hours on water. The analysis during different phases of priming procedure (soaking and drying), after whole osmopriming process and germination were done. 10 samples, four condition experiment; non dried primed seeds (Pnd) vs. dry unprimed seeds (UPd) (PEG soaking), non dried primed seeds (Pnd) vs dry primed seeds (Pd) (drying after soaking), dry primed seeds (Pd) vs. dry unprimed seeds (UPd) (full osmopriming process), primed seeds imbibed on water (P7h) vs unprimed seeds imbibed on water (UP7h) (germination after osmopriming). Biological replicates: 2 replicates for comparison PEG soaking, drying after soaking, full osmopriming process and germination after osmopriming.

2014-11-23 | E-GEOD-61702 | biostudies-arrayexpress

Comparison of genes differentially expressed between Medicago R108 and abi3 mutants (NF3185 and NF6003) during different stages of seed development (16, 24, 32 and 40 DAP)

Project description:ABI3 is a B3-domain transcription factor that acts as a master regulator of seed maturation. To identify genes that are regulated specifically by ABI3 in the model legume Medicago R108 during seed development, using the Medicago NimbleGen chip, a transcriptomic analysis was performed between abi3 mutants (NF3185 and NF6003) and R108 wild-type at 4 stages of seed development.

2021-07-29 | GSE181013 | GEO

Medicago truncatula R108: permissive medium versus non permissive medium. Comparison of the transcriptomic response of medicago truncatula plants.

Project description:12plex_medicago_2013-08 - r108 permissive medium versus non permissive medium. - Two experiments to compare the transcriptomic response of medicago plants: Agar medium versus Phytagel medium (exp1) and rhizobium WT versus BacA (exp2). - Medicago truncatula R108 seedlings were inoculated with S. medicae WSM419 and were cultivated during three days on buffered nidulation medium solidified with Phytagel or Agar.

2018-11-01 | GSE121771 | GEO

Quantitative Proteomic Atlas Uncovering the widespread Ubiquitylation regulation in the Embryo of Germinating Rice Seed

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2022-02-23 | PXD006526 | Pride

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