Changes in the allocation of endogenous strigolactone improve plant biomass production on phosphate-poor soils.

Details

Ressource 1Download: Liu_et_al-2018-New_Phytologist.pdf (2427.18 [Ko])
State: Public
Version: Final published version
License: Not specified
Serval ID
serval:BIB_08C6C58FD78E
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Changes in the allocation of endogenous strigolactone improve plant biomass production on phosphate-poor soils.
Journal
The New phytologist
Author(s)
Liu G., Pfeifer J., de Brito Francisco R., Emonet A., Stirnemann M., Gübeli C., Hutter O., Sasse J., Mattheyer C., Stelzer E., Walter A., Martinoia E., Borghi L.
ISSN
1469-8137 (Electronic)
ISSN-L
0028-646X
Publication state
Published
Issued date
01/2018
Peer-reviewed
Oui
Volume
217
Number
2
Pages
784-798
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
Strigolactones (SLs) are carotenoid-derived phytohormones shaping plant architecture and inducing the symbiosis with endomycorrhizal fungi. In Petunia hybrida, SL transport within the plant and towards the rhizosphere is driven by the ABCG-class protein PDR1. PDR1 expression is regulated by phytohormones and by the soil phosphate abundance, and thus SL transport integrates plant development with nutrient conditions. We overexpressed PDR1 (PDR1 OE) to investigate whether increased endogenous SL transport is sufficient to improve plant nutrition and productivity. Phosphorus quantification and nondestructive X-ray computed tomography were applied. Morphological and gene expression changes were quantified at cellular and whole tissue levels via time-lapse microscopy and quantitative PCR. PDR1 OE significantly enhanced phosphate uptake and plant biomass production on phosphate-poor soils. PDR1 OE plants showed increased lateral root formation, extended root hair elongation, faster mycorrhization and reduced leaf senescence. PDR1 overexpression allowed considerable SL biosynthesis by releasing SL biosynthetic genes from an SL-dependent negative feedback. The increased endogenous SL transport/biosynthesis in PDR1 OE plants is a powerful tool to improve plant growth on phosphate-poor soils. We propose PDR1 as an as yet unexplored trait to be investigated for crop production. The overexpression of PDR1 is a valuable strategy to investigate SL functions and transport routes.
Keywords
Biomass, Biosynthetic Pathways, Gene Expression Regulation, Plant, Genotype, Indoleacetic Acids/metabolism, Lactones/metabolism, Meristem/metabolism, Models, Biological, Mycorrhizae/physiology, Petunia/genetics, Petunia/metabolism, Phenotype, Phosphates/deficiency, Plant Leaves/metabolism, Plant Proteins/metabolism, Plant Shoots/anatomy & histology, Plant Shoots/genetics, Plants, Genetically Modified, Soil/chemistry, Up-Regulation, PLEIOTROPIC DRUG RESISTANCE1 (PDR1), auxin, mycorrhization, petunia, phosphate uptake, plant biomass, strigolactone, strigolactone transport
Pubmed
Web of science
Open Access
Yes
Create date
09/11/2017 18:53
Last modification date
24/09/2019 6:11
Usage data