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Identification and characterization of the maize arogenate dehydrogenase gene family

Journal Article · · Journal of Experimental Botany
DOI:https://doi.org/10.1093/jxb/erq179· OSTI ID:1625365
 [1];  [2];  [2];  [2];  [2];  [2];  [3]
  1. Univ. of Nebraska, Lincoln, NE (United States). Center for Plant Science Innovation; DOE/OSTI
  2. Pioneer Hi-Bred International, Johnston, IA (United States)
  3. Univ. of Arizona, Tucson, AZ (United States). Dept. of Plant Sciences
In plants, the amino acids tyrosine and phenylalanine are synthesized from arogenate by arogenate dehydrogenase and arogenate dehydratase, respectively, with the relative flux to each being tightly controlled. Here the characterization of a maize opaque endosperm mutant (mto140), which also shows retarded vegetative growth, is described The opaque phenotype co-segregates with a Mutator transposon insertion in an arogenate dehydrogenase gene (zmAroDH-1) and this led to the characterization of the four-member family of maize arogenate dehydrogenase genes (zmAroDH-1–zmAroDH-4) which share highly similar sequences. A Mutator insertion at an equivalent position in AroDH-3, the most closely related family member to AroDH-1, is also associated with opaque endosperm and stunted vegetative growth phenotypes. Overlapping but differential expression patterns as well as subtle mutant effects on the accumulation of tyrosine and phenylalanine in endosperm, embryo, and leaf tissues suggest that the functional redundancy of this gene family provides metabolic plasticity for the synthesis of these important amino acids. mto140/arodh-1 seeds shows a general reduction in zein storage protein accumulation and an elevated lysine phenotype typical of other opaque endosperm mutants, but it is distinct because it does not result from quantitative or qualitative defects in the accumulation of specific zeins but rather from a disruption in amino acid biosynthesis.
Research Organization:
Univ. of Arizona, Tucson, AZ (United States)
Sponsoring Organization:
National Science Foundation (NSF); Pioneer Hi-Bred International; USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
Grant/Contract Number:
FG02-96ER20242
OSTI ID:
1625365
Journal Information:
Journal of Experimental Botany, Journal Name: Journal of Experimental Botany Journal Issue: 13 Vol. 61; ISSN 0022-0957
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (14)

Biochemical and genetic analyses of N metabolism in maize testcross seedlings: 2. Roots journal March 2018
Maize opaque mutants are no longer so opaque journal July 2018
Organization and evolution of the chalcone synthase gene family in bread wheat and relative species journal March 2019
Evolutionary and functional analysis of mulberry type III polyketide synthases journal August 2016
An update on the maize zein-gene family in the post-genomics era journal December 2019
Maize opaque10 Encodes a Cereal-Specific Protein That Is Essential for the Proper Distribution of Zeins in Endosperm Protein Bodies journal August 2016
Recent advances in the study of prolamin storage protein organization and function journal June 2014
Role of proline in cell wall synthesis and plant development and its implications in plant ontogeny journal January 2015
Genetic Enhancement of Grain Quality-Related Traits in Maize book March 2012
The regulation of zein biosynthesis in maize endosperm journal January 2020
Chalcone synthases (CHSs): the symbolic type III polyketide synthases journal November 2019
Genome-wide dissection of the chalcone synthase gene family in Oryza sativa journal September 2017
Arabidopsis MYB4 plays dual roles in flavonoid biosynthesis journal November 2019
Opaque7 Encodes an Acyl-Activating Enzyme-Like Protein That Affects Storage Protein Synthesis in Maize Endosperm journal December 2011

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