Dataset Information

Proteomic analysis in transgenic hybrid aspen (Populus tremula x tremuloides) trees overexpression of vesicle-associated membrane protein PttVAP27-17

ABSTRACT: In this study we report on transgenic hybrid aspen (Populus tremula x P. tremuloides) lines that showed potential to increase biomass production both in the greenhouse and after five years of growth in the field. The transgenic lines carried an overexpression construct for Populus tremula x tremuloides vesicle-associated membrane protein (VAMP)-associated protein PttVAP27-17 (Potri.019G116400) that was selected from a gene-mining program for novel regulators of wood formation. A proteomic analysis was performed to characterize the overall effect of the overexpression of PttVAP27-17 on plant metabolic pathways. 20 mg of xylem sample for the selected wild type (WT) and three transgenic lines (lines 1,2 and 3) was collected in the following manner from two-months-old, greenhouse grown trees: The frozen bottom-part of the stem (10-17 cm portion from the base of the stem) was peeled, and the surface of the secondary xylem consisting of living vessels and fibers (into the depth of approximately one mm from the surface) was scraped. The xylem scrapings were ground to fine powder in liquid nitrogen and stored at -80oC. The analyses included 3-5 biological replicates for each of the transgenic lines, and seven replicates for the wild type.

INSTRUMENT(S): SYNAPT G2-Si

ORGANISM(S): Populus Tremula X Populus Tremuloides

TISSUE(S): Wood

SUBMITTER: Joakim Bygdell

LAB HEAD: Hannele Tuominen

PROVIDER: PXD023826 | Pride | 2021-09-10

REPOSITORIES: Pride

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Dataset's files

Source:

			Action	DRS
	2013-05-31_BIO_G1211-1.raw.zip	Raw
	2013-05-31_BIO_G1211-1_20130612165624.zip	Other
	2013-05-31_BIO_G1211-2.raw.zip	Raw
	2013-05-31_BIO_G1211-2_20130612181625.zip	Other
	2013-05-31_BIO_G1211.raw.zip	Raw

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Publications

Overexpression of vesicle-associated membrane protein PttVAP27-17 as a tool to improve biomass production and the overall saccharification yields in Populus trees.

Gandla Madhavi Latha ML Mähler Niklas N Escamez Sacha S Skotare Tomas T Obudulu Ogonna O Möller Linus L Abreu Ilka N IN Bygdell Joakim J Hertzberg Magnus M Hvidsten Torgeir R TR Moritz Thomas T Wingsle Gunnar G Trygg Johan J Tuominen Hannele H Jönsson Leif J LJ

Biotechnology for biofuels 20210216 1

<h4>Background</h4>Bioconversion of wood into bioproducts and biofuels is hindered by the recalcitrance of woody raw material to bioprocesses such as enzymatic saccharification. Targeted modification of the chemical composition of the feedstock can improve saccharification but this gain is often abrogated by concomitant reduction in tree growth.<h4>Results</h4>In this study, we report on transgenic hybrid aspen (Populus tremula × tremuloides) lines that showed potential to increase biomass produ ...[more]

PMID: 33593413

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Project description:<h4>Background</h4>Bioconversion of wood into bioproducts and biofuels is hindered by the recalcitrance of woody raw material to bioprocesses such as enzymatic saccharification. Targeted modification of the chemical composition of the feedstock can improve saccharification but this gain is often abrogated by concomitant reduction in tree growth.<h4>Results</h4>In this study, we report on transgenic hybrid aspen (Populus tremula × tremuloides) lines that showed potential to increase biomass production both in the greenhouse and after 5 years of growth in the field. The transgenic lines carried an overexpression construct for Populus tremula × tremuloides vesicle-associated membrane protein (VAMP)-associated protein PttVAP27-17 that was selected from a gene-mining program for novel regulators of wood formation. Analytical-scale enzymatic saccharification without any pretreatment revealed for all greenhouse-grown transgenic lines, compared to the wild type, a 20-44% increase in the glucose yield per dry weight after enzymatic saccharification, even though it was statistically significant only for one line. The glucose yield after enzymatic saccharification with a prior hydrothermal pretreatment step with sulfuric acid was not increased in the greenhouse-grown transgenic trees on a dry-weight basis, but increased by 26-50% when calculated on a whole biomass basis in comparison to the wild-type control. Tendencies to increased glucose yields by up to 24% were present on a whole tree biomass basis after acidic pretreatment and enzymatic saccharification also in the transgenic trees grown for 5 years on the field when compared to the wild-type control.<h4>Conclusions</h4>The results demonstrate the usefulness of gene-mining programs to identify novel genes with the potential to improve biofuel production in tree biotechnology programs. Furthermore, multi-omic analyses, including transcriptomic, proteomic and metabolomic analyses, performed here provide a toolbox for future studies on the function of VAP27 proteins in plants.