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ABSTRACT: Two wild plant species regulate flooding survival through distinct mechanisms

PROVIDER: PRJEB1261 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	Racetosa454.bam	Bam
	Racetosa454.bam.bai	Bam
	Rpalustris454.bam	Bam
	Rpalustris454.bam.bai	Bam

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Project description:Flooding stress is a major environmental threat for many terrestrial plants. The detrimental effects of flooding stress, however, vary between different plant species. Whereas many crops are rather sensitive to flooding, some wild species from flood-prone areas are well adapted to excess water conditions. Morphological adaptations like adventitious roots and aerenchyma formation, or the ability to elongate rapidly the above-ground organs, allow these plants to thrive in water. The focus of this research is Nasturtium officinale, also known as watercress, which is an auto-tetraploid, dicotyledonous and stem-growing Brassicaceae species. Its natural habitat is near rivers and streams, but absent from stagnant water. Submergence induces underwater elongation of stems and growth suppression of petioles in Nasturtium officinale. By using the RNA sequencing technique, we aimed to uncover the underlying mechanisms for these contrasting responses. Combining submergence experiments with hormone manipulations revealed that ABA degradation is required for stem elongation.

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Universal plant phosphoproteomics workflow and its application to tomato signaling in response to cold stress

Project description:Phosphorylation-mediated signaling transduction plays a crucial role in the regulation of plant defense mechanisms against environmental stresses. To address the high complexity and dynamic range of plant proteomes and phosphoproteomes, we present a universal sample preparation procedure that facilitates plant phosphoproteomic profiling. This advanced workflow significantly improves phosphopeptide identifications, enabling deep insight into plant phosphoproteomes. We then applied the workflow to study the phosphorylation events involved in tomato cold tolerance mechanisms. Phosphoproteomic changes of two tomato species (N135 Green Gage and Atacames) with distinct cold tolerance phenotypes were profiled under cold stress. In total, we identified more than 30,000 unique phosphopeptides from tomato leaves, representing about 5,500 phosphoproteins, thereby creating the largest tomato phosphoproteomic resource to date. The data, along with the validation through in vitro kinase reactions, allowed us to identify kinases involved in cold tolerant signaling and discover distinctive kinase-substrate events in two tomato species in response to a cold environment. In particular, the activation of SnRK2s and their direct substrates may assist N135 Green Gage tomatoes in surviving long-term cold stress. Taken together, the streamlined approach and the resulting deep phosphoproteomic analyses revealed a global view of tomato cold-induced signaling mechanisms.

2018-09-20 | PXD010310 | JPOST Repository

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Project description:Phosphorylation-mediated signaling transduction plays a crucial role in the regulation of plant defense mechanisms against environmental stresses. In order to address the high complexity and dynamic range of plant proteomes and phosphoproteomes, we present a universal sample preparation procedure to facilitate profiling plant phosphoproteomes. This advanced workflow significantly improves phosphopeptide identifications, enabling deep insight into plant phosphoproteomes. We then applied the workflow to study the phosphorylation events involved in tomato cold tolerance mechanisms. Phosphoproteomic changes of two tomato species (N135 Green Gage and Atacames) with distinct cold tolerance phenotypes were profiled under cold stress. In total, we identified more than 30,000 unique phosphopeptides from tomato leaves, representing about 5,500 phosphoproteins, as the largest tomato phosphoproteomic resource. The data, along with the validation through in vitro kinase reactions, allowed us to identify kinases involved in cold tolerant signaling and discover distinctive kinase-substrate events in two tomato species under cold environment. In particular, the activation of SnRK2s and their direct substrates may assist N135 Green Gage tomatoes in surviving long-term cold stress. Taken together, the streamlined approach and the resulting deep phosphoproteomic analyses revealed a global view of tomato cold-induced signaling mechanisms.

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