skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Transgenic approaches to altering carbon and nitrogen partitioning in whole plants: assessing the potential to improve crop yields and nutritional quality

Journal Article · · Frontiers in Plant Science
 [1];  [1];  [2]
  1. Univ. of North Texas, Denton, TX (United States). Dept. of Biological Sciences
  2. Colorado State Univ., Fort Collins, CO (United States)

The principal components of plant productivity and nutritional value, from the standpoint of modern agriculture, are the acquisition and partitioning of organic carbon (C) and nitrogen (N) compounds among the various organs of the plant. The flow of essential organic nutrients among the plant organ systems is mediated by its complex vascular system, and is driven by a series of transport steps including export from sites of primary assimilation, transport into and out of the phloem and xylem, and transport into the various import-dependent organs. Manipulating C and N partitioning to enhance yield of harvested organs is evident in the earliest crop domestication events and continues to be a goal for modern plant biology. Research on the biochemistry, molecular and cellular biology, and physiology of C and N partitioning has now matured to an extent that strategic manipulation of these transport systems through biotechnology are being attempted to improve movement from source to sink tissues in general, but also to target partitioning to specific organs. These nascent efforts are demonstrating the potential of applied biomass targeting but are also identifying interactions between essential nutrients that require further basic research. In this review, we summarize the key transport steps involved in C and N partitioning, and discuss various transgenic approaches for directly manipulating key C and N transporters involved. In addition, we propose several experiments that could enhance biomass accumulation in targeted organs while simultaneously testing current partitioning models.

Research Organization:
Colorado State Univ., Fort Collins, CO (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-08ER64629
OSTI ID:
1184807
Journal Information:
Frontiers in Plant Science, Vol. 6; ISSN 1664-462X
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 60 works
Citation information provided by
Web of Science

References (83)

Imaging and tracing of intracellular metabolites utilizing genetically encoded fluorescent biosensors journal September 2013
Application of imaging mass spectrometry for the analysis of Oryza sativa rice journal August 2010
Localization of galactinol, raffinose, and stachyose synthesis in Cucurbita pepo leaves journal October 1992
Sugar synthesis and phloem loading in Coleus blumei leaves journal June 1992
Overexpression of the sucrose transporter SoSUT1 in potato results in alterations in leaf carbon partitioning and in tuber metabolism but has little impact on tuber morphology journal February 2003
BAT1, a bidirectional amino acid transporter in Arabidopsis journal February 2009
Expression and transcriptional regulation of amino acid transporters in plants journal March 2006
Functional analysis of LjSUT4, a vacuolar sucrose transporter from Lotus japonicus journal July 2008
MRI of intact plants journal August 2009
The monosaccharide transporter(-like) gene family in Arabidopsis journal March 2007
Molecular physiology of higher plant sucrose transporters journal March 2007
Transporters for amino acids in plant cells: some functions and many unknowns journal June 2012
Current perspectives on the regulation of whole-plant carbohydrate partitioning journal April 2010
Lipidomics in situ: Insights into plant lipid metabolism from high resolution spatial maps of metabolites journal April 2014
Function and regulation of plant invertases: sweet sensations journal December 2004
Amino acid transporters in plants journal May 2000
Intercellular Connections Are Developmentally Controlled to Help Move Molecules through the Plant journal July 1999
Simple, but Not Branched, Plasmodesmata Allow the Nonspecific Trafficking of Proteins in Developing Tobacco Leaves journal June 1999
Phloem loading and plasmodesmata journal December 1996
Amino acid transport in plants journal May 1998
Entering the second century of maize quantitative genetics journal March 2013
Sugar transporters for intercellular exchange and nutrition of pathogens journal November 2010
Evolution of crop species: genetics of domestication and diversification journal November 2013
Seed-specific overexpression of a potato sucrose transporter increases sucrose uptake and growth rates of developing pea cotyledons journal April 2002
Cloning and functional expression of alkaline alpha-galactosidase from melon fruit: similarity to plant SIP proteins uncovers a novel family of plant glycosyl hydrolases journal January 2003
Control improves with age: Intercellular transport in plant embryos and adults journal January 2005
Detection of glutamate release from neurons by genetically encoded surface-displayed FRET nanosensors journal June 2005
Phloem loading in Verbascum phoeniceum L. depends on the synthesis of raffinose-family oligosaccharides journal December 2007
A comprehensive picture of phloem loading strategies journal July 2009
Sucrose-mediated transcriptional regulation of sucrose symporter activity in the phloem journal July 2002
The absence of phloem loading in willow leaves journal September 1998
Distinct Properties of the Five UDP-d-glucose/UDP-d-galactose 4-Epimerase Isoforms of Arabidopsis thaliana journal April 2006
Compartmentation of transport and transfer events in developing seeds journal April 2001
Transport and metabolism of raffinose family oligosaccharides in transgenic potato journal September 2006
Intracellular sucrose communicates metabolic demand to sucrose transporters in developing pea cotyledons journal October 2008
Evidence for functional heterogeneity of sieve element–companion cell complexes in minor vein phloem of Alonsoa meridionalis journal March 2009
Arabidopsis SUC1 loads the phloem in suc2 mutants when expressed from the SUC2 promoter journal October 2011
Understanding and manipulating sucrose phloem loading, unloading, metabolism, and signalling to enhance crop yield and food security journal December 2013
Transporters involved in source to sink partitioning of amino acids and ureides: opportunities for crop improvement journal January 2014
Functional Characterization and RNAi-Mediated Suppression Reveals Roles for Hexose Transporters in Sugar Accumulation by Tomato Fruit journal November 2010
Membrane-Transport Systems for Sucrose in Relation to Whole-Plant Carbon Partitioning journal May 2011
Cloning, Expression, and Characterization of Sorbitol Transporters from Developing Sour Cherry Fruit and Leaf Sink Tissues journal March 2003
Ectopic Expression of an Amino Acid Transporter (VfAAP1) in Seeds of Vicia narbonensis and Pea Increases Storage Proteins journal April 2005
The Use of Fluorescent Tracers to Characterize the Post-Phloem Transport Pathway in Maternal Tissues of Developing Wheat Grains journal January 1994
Cell-to-Cell Movement of Green Fluorescent Protein Reveals Post-Phloem Transport in the Outer Integument and Identifies Symplastic Domains in Arabidopsis Seeds and Embryos journal September 2005
Identification of a Vacuolar Sucrose Transporter in Barley and Arabidopsis Mesophyll Cells by a Tonoplast Proteomic Approach journal March 2006
A Shift of Phloem Unloading from Symplasmic to Apoplasmic Pathway Is Involved in Developmental Onset of Ripening in Grape Berry journal July 2006
Cloning and Expression Analysis of a UDP-Galactose/Glucose Pyrophosphorylase from Melon Fruit Provides Evidence for the Major Metabolic Pathway of Galactose Metabolism in Raffinose Oligosaccharide Metabolizing Plants journal July 2006
Global Transcript Levels Respond to Small Changes of the Carbon Status during Progressive Exhaustion of Carbohydrates in Arabidopsis Rosettes journal February 2008
Genetic Control of Carbon Partitioning in Grasses: Roles of Sucrose Transporters and Tie-dyed Loci in Phloem Loading journal January 2009
Phloem Loading Strategies in Three Plant Species That Transport Sugar Alcohols journal January 2009
Increasing Sucrose Uptake Capacity of Wheat Grains Stimulates Storage Protein Synthesis journal December 2009
Carbohydrate Export from the Leaf: A Highly Regulated Process and Target to Enhance Photosynthesis and Productivity: Figure 1. journal October 2010
Genetic and Genomic Evidence That Sucrose Is a Global Regulator of Plant Responses to Phosphate Starvation in Arabidopsis     journal February 2011
Impaired Function of the Tonoplast-Localized Sucrose Transporter in Rice, OsSUT2 , Limits the Transport of Vacuolar Reserve Sucrose and Affects Plant Growth journal July 2011
Siliques Are Red1 from Arabidopsis Acts as a Bidirectional Amino Acid Transporter That Is Crucial for the Amino Acid Homeostasis of Siliques journal February 2012
Expression of Sucrose Transporter cDNAs Specifically in Companion Cells Enhances Phloem Loading and Long-Distance Transport of Sucrose but Leads to an Inhibition of Growth and the Perception of a Phosphate Limitation journal April 2014
Diurnal Changes in Maize Leaf Photosynthesis: I. Carbon Exchange Rate, Assimilate Export Rate, and Enzyme Activities journal February 1987
Rapid Metabolism of Glucose Detected with FRET Glucose Nanosensors in Epidermal Cells and Intact Roots of Arabidopsis RNA-Silencing Mutants journal August 2006
Posttranslational Elevation of Cell Wall Invertase Activity by Silencing Its Inhibitor in Tomato Delays Leaf Senescence and Increases Seed Weight and Fruit Hexose Level journal July 2009
S-Methylmethionine Plays a Major Role in Phloem Sulfur Transport and Is Synthesized by a Novel Type of Methyltransferase journal August 1999
Mass Spectrometry Imaging with Single-Cell Resolution: Spatial Distribution of Lipids in Cotton Seeds journal February 2012
The Control of Single-Celled Cotton Fiber Elongation by Developmentally Reversible Gating of Plasmodesmata and Coordinated Expression of Sucrose and K+ Transporters and Expansin journal January 2001
Identification of a Mannitol Transporter, AgMaT1, in Celery Phloem journal March 2001
Over-expression ofSTP13, a hexose transporter, improves plant growth and nitrogen use inArabidopsis thalianaseedlings journal March 2009
Increasing amino acid supply in pea embryos reveals specific interactions of N and C metabolism, and highlights the importance of mitochondrial metabolism journal September 2008
Protonophore- and pH-insensitive glucose and sucrose accumulation detected by FRET nanosensors in Arabidopsis root tips journal December 2008
The Arabidopsis sugar transporter (AtSTP) family: an update journal August 2010
A Transgenic Study on Affecting Potato Tuber Yield by Expressing the Rice Sucrose Transporter Genes OsSUT5Z and OsSUT2MF journal July 2011
Cell-wall invertases, key enzymes in the modulation of plant metabolism during defence responses: Cell-wall invertase in the defence response journal May 2014
SWEET sugar transporters for phloem transport and pathogen nutrition journal August 2013
Improvement of pea biomass and seed productivity by simultaneous increase of phloem and embryo loading with amino acids journal December 2014
Sucrose Efflux Mediated by SWEET Proteins as a Key Step for Phloem Transport journal December 2011
Crop Productivity and Photoassimilate Partitioning journal August 1984
A Bountiful Harvest: Genomic Insights into Crop Domestication Phenotypes journal April 2013
Phloem Transport: Cellular Pathways and Molecular Trafficking journal June 2009
PHLOEM UNLOADING: Sieve Element Unloading and Post-Sieve Element Transport journal June 1997
Proton-Coupled Sugar and Amino Acid Transporters in Plants journal June 1993
Effective carbon partitioning driven by exotic phloem-specific regulatory elements fused to the Arabidopsis thaliana AtSUC2 sucrose-proton symporter gene journal January 2009
Visualization of Glutamine Transporter Activities in Living Cells Using Genetically Encoded Glutamine Sensors journal June 2012
The evolution of minor vein phloem and phloem loading journal August 2001
Evolution of plant sucrose uptake transporters journal January 2012
Metabolic engineering of raffinose-family oligosaccharides in the phloem reveals alterations in carbon partitioning and enhances resistance to green peach aphid journal January 2013

Cited By (11)

Maize Carbohydrate partitioning defective1 impacts carbohydrate distribution, callose accumulation, and phloem function journal May 2018
Sucrose transporter2 contributes to maize growth, development, and crop yield: ZmSUT2 contributes to plant growth and yield journal April 2017
Source and sink mechanisms of nitrogen transport and use journal November 2017
Blocking amino acid transporter OsAAP3 improves grain yield by promoting outgrowth buds and increasing tiller number in rice journal March 2018
Sucrose accumulation in sweet sorghum stems occurs by apoplasmic phloem unloading and does not involve differential Sucrose transporter expression journal July 2015
An update on phloem transport: a simple bulk flow under complex regulation journal January 2017
New Insights into Phloem Unloading and Expression of Sucrose Transporters in Vegetative Sinks of the Parasitic Plant Phelipanche ramosa L. (Pomel) journal January 2017
13C-Metabolic Flux Analysis in Developing Flax (Linum usitatissinum L.) Embryos to Understand Storage Lipid Biosynthesis journal December 2019
Marginal Lands to Grow Novel Bio-Based Crops: A Plant Breeding Perspective journal March 2020
Cytokinins and Expression of SWEET, SUT, CWINV and AAP Genes Increase as Pea Seeds Germinate journal December 2016
Differential Gene Expression in the Meristem and during Early Fruit Growth of Pisum sativum L. Identifies Potential Targets for Breeding journal February 2017