Dataset Information

Transcriptome and proteome profiles of the diazotroph Nitrospirillum amazonense strain CBAmC in response to the sugarcane apoplast fluid

ABSTRACT: The diazotrophic CBAmC strain of Nitrospirillum amazonense has been reported to promote growth of sugarcane variety RB867515 when inoculated under field conditions in a consortium with four other nitrogen-fixing bacteria. The present work had the objective of accessing the influence of the sugarcane apoplast fluid from variety RB867515 on the global transcriptomic and proteomic profiles of CBAmC strain cultured in vitro. The comparative analysis between the transcriptome and proteome profiles showed strong consistency between the results of the two approaches. Data analysis revealed that expression levels of transcripts and proteins related to cell motility and signal transduction, among other functions, were strongly downregulated in the presence of the apoplast fluid. In contrast, transcripts and proteins were upregulated for functional categories including chaperones, iron homeostasis and multidrug efflux transporters. In conclusion, the results showed that the metabolic state of N. amazonense during cultivation in the presence of the apoplast fluid is directed to functions capable of supporting adaptation to the complex environment of the sugarcane apoplast.

INSTRUMENT(S): Synapt MS

ORGANISM(S): Nitrospirillum Amazonense Cbamc

TISSUE(S): Cell Culture

SUBMITTER: Stefan Schwab

LAB HEAD: Stefan Schwab

PROVIDER: PXD013518 | Pride | 2019-07-12

REPOSITORIES: Pride

ACCESS DATA

Dataset's files

Source:

			Action	DRS
	2016_12_16_MARCIA_1A_CBAMC.msE.zip	Other
	2016_12_16_MARCIA_1A_CBAMC.raw.zip	Raw
	2016_12_16_MARCIA_1B_CBAMC.msE.zip	Other
	2016_12_16_MARCIA_1B_CBAMC.raw.zip	Raw
	2016_12_16_MARCIA_1C_CBAMC.msE.zip	Other

Items per page:

1 - 5 of 13

Similar Datasets

Project description:In C4 sugarcane (Saccharum spp. hybrids), photosynthetic activity has been shown to be regulated by the demand for carbon from sink tissues. There is evidence, from other plant species, that sink-limitation of photosynthesis is facilitated by sugar-signaling mechanisms in the leaf that affect photosynthesis through regulation of gene expression. In this work, we manipulated leaf sugar levels by cold-girdling leaves (5oC) for 80 h to examine the mechanisms whereby leaf sugar accumulation affects photosynthetic activity and assess whether signaling mechanisms reported for other species operate in sugarcane. During this time, sucrose and hexose concentrations above the girdle increased by 77% and 81%, respectively. Conversely, leaf photosynthetic activity (A) and electron transport rates (ETR) decreased by 66% and 54%, respectively. Quantitative expression profiling by means of an Affymetrix GeneChip Sugarcane Genome Array was used to identify genes responsive to cold-girdling (56 h). A number of genes (74) involved in primary and secondary metabolic pathways were identified as being differentially expressed. Decreased expression of genes related to photosynthesis and increased expression of genes involved in assimilate partitioning, cell wall synthesis, phosphate metabolism and stress were observed. Furthermore four probe sets homologous to trehalose 6-phosphate phosphatase (TPP; EC 5.3.1.1) and trehalose 6-phosphate synthase (TPS; EC 2.4.1.15) were up- and down-regulated, respectively, indicating a possible role for trehalose 6-phosphate (T6P) as a putative sugar-sensor in sugarcane leaves. Twelve month-old field grown Saccharum spp. (L.) hybrid cv. N19 (N19) cultivated at Mount Edgecombe, KwaZulu-Natal (SASRI) were used in the study, which was conducted in November, 2006. Plants were grown on a 5 x 15 m plot located on a north-east facing slope with a gradient of ca. 10o. Cold-girdles were attached to sugarcane leaves (n=4) for a period of 56 h prior to harvest. The girdle consisted of 0.75 cm (diameter) soft plastic tubing, firmly clamped around each leaf, approximately 30 cm from the leaf base. Cooled water maintained at 5oC was then pumped through the tubing using a Grant LTD6G cooling bath (Grant Instruments, Barrington, Cambridge, UK). At harvest, leaf samples were immediately frozen in liquid nitrogen (–196oC) and subsequently milled in an A11 Basic Analysis Mill (IKA, Staufen, Germany). Ground leaf tissue was stored at –80oC in 50 ml centrifuge tubes prior to analysis.

Dataset Information

Transcriptome and proteome profiles of the diazotroph Nitrospirillum amazonense strain CBAmC in response to the sugarcane apoplast fluid

Dataset's files

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets