Synthesis and regulation of auxin and abscisic acid in maize

Yue, Kai; Li, Lingling; Xie, Junhong; Coulter, Jeffrey A.; Luo, Zidong

doi:10.1080/15592324.2021.1891756

Cited by 12 publications

(7 citation statements)

References 181 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, ABA is formed by 9-cis-epoxycarotenoid dioxygenases NCED from 9-cis-violaxanthin and 9-cisneoxanthine (violaxanthin derivatives), while strigolactones are synthesized by cleavage of β-carotene by CCD dioxygenases (Nambara, Marion-Poll, 2005;Cutler et al, 2010;Dhar et al, 2020). ABA plays a crucial role in the adaptability of plants, including Z. mays, to various environmental conditions, mediating growth, development, stress response, and nutrient distribution (Huang et al, 2017;Yue et al, 2021). Strigolactones are actively involved in the stress response of plants (López-Ráez et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

5′-UTR allelic variants and expression of the lycopene-ɛ-cyclase LCYE gene in maize (Zea mays L.) inbred lines of Russian selection

Arkhestova,

Shomakhov,

Shchennikova

et al. 2023

Vestn. VOGiS

View full text Add to dashboard Cite

In breeding, biofortification is aimed at enriching the edible parts of the plant with micronutrients. Within the framework of this strategy, molecular screening of collections of various crops makes it possible to determine allelic variants of genes, new alleles, and the linkage of allelic variants with morphophysiological traits. The maize (Zea mays L.) is an important cereal and silage crop, as well as a source of the main precursor of vitamin A – β-carotene, a derivative of the β,β-branch of the carotenoid biosynthesis pathway. The parallel β,ε-branch is triggered by lycopene-ε-cyclase LCYE, a low expression of which leads to an increase in provitamin A content and is associated with the variability of the 5’-UTR gene regulatory sequence. In this study, we screened a collection of 165 maize inbred lines of Russian selection for 5’-UTR LCYE allelic variants, as well as searched for the dependence of LCYE expression levels on the 5’-UTR allelic variant in the leaves of 14 collection lines. 165 lines analyzed were divided into three groups carrying alleles A2 (64 lines), A5 (31) and A6 (70), respectively. Compared to A2, allele A5 contained two deletions (at positions -267–260 and -296–290 from the ATG codon) and a G251→T substitution, while allele A6 contained one deletion (-290–296) and two SNPs (G251→T, G265→T). Analysis of LCYE expression in the leaf tissue of seedlings from accessions of 14 lines differing in allelic variants showed no associations of the 5’-UTR LCYE allele type with the level of gene expression. Four lines carrying alleles A2 (6178-1, 6709-2, 2289-3) and A5 (5677) had a significantly higher level of LCYE gene expression (~0.018–0.037) than the other 10 analyzed lines (~0.0001–0.004), among which all three allelic variants were present.

show abstract

Section: Discussionmentioning

confidence: 99%

5′-UTR allelic variants and expression of the lycopene-ɛ-cyclase LCYE gene in maize (Zea mays L.) inbred lines of Russian selection

Arkhestova,

Shomakhov,

Shchennikova

et al. 2023

Vestn. VOGiS

View full text Add to dashboard Cite

show abstract

“…Arabidopsis was found to contain only one gene encodes INS (At4g02610). Alternatively, tryptophan synthase α subunit encoded by TSA produces indole from indole-3-glycerol phosphate in the plastids [34,35]. After that, TSβ subunit encoded by TSB converts indole into trp.…”

Section: Tryptophan Synthase a But Not Indole Synthase Is Coexpressed...mentioning

confidence: 99%

Comparative Coexpression Analysis of Indole Synthase and Tryptophan Synthase A Reveals the Independent Production of Auxin via the Cytosolic Free Indole

Abu-Zaitoon

Al-Ramamneh

Al-Tawaha

et al. 2023

Plants

View full text Add to dashboard Cite

Indole synthase (INS), a homologous cytosolic enzyme of the plastidal tryptophan synthase A (TSA), has been reported as the first enzyme in the tryptophan-independent pathway of auxin synthesis. This suggestion was challenged as INS or its free indole product may interact with tryptophan synthase B (TSB) and, therefore, with the tryptophan-dependent pathway. Thus, the main aim of this research was to find out whether INS is involved in the tryptophan-dependent or independent pathway. The gene coexpression approach is widely recognized as an efficient tool to uncover functionally related genes. Coexpression data presented here were supported by both RNAseq and microarray platforms and, hence, considered reliable. Coexpression meta-analyses of Arabidopsis genome was implemented to compare between the coexpression of TSA and INS with all genes involved in the production of tryptophan via the chorismate pathway. Tryptophan synthase A was found to be coexpressed strongly with TSB1/2, anthranilate synthase A1/B1, phosphoribosyl anthranilate transferase1, as well as indole-3-glycerol phosphate synthase1. However, INS was not found to be coexpressed with any target genes suggesting that it may exclusively and independently be involved in the tryptophan-independent pathway. Additionally, annotation of examined genes as ubiquitous or differentially expressed were described and subunits-encoded genes available for the assembly of tryptophan and anthranilate synthase complex were suggested. The most probable TSB subunits expected to interact with TSA is TSB1 then TSB2. Whereas TSB3 is only used under limited hormone conditions to assemble tryptophan synthase complex, putative TSB4 is not expected to be involved in the plastidial synthesis of tryptophan in Arabidopsis.

show abstract

“…In higher plants, the general framework of the ABA biosynthetic pathway has been well established. Zeaxanthin epoxidase (ZEP) and 9‐ cis ‐epoxycarotenoid dioxygenase (NCED) are the two key enzymes involved in the biosynthesis of ABA (Taylor et al, 2000; Yan et al, 2022; Yue et al, 2021). The genes encoding ZEP ( ZEP1 and ZEP2 ) and NCED ( NCED1 and NCED5 ) are reported frequently expressed in maize tissues (Capelle et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Differential roles of abscisic acid in maize roots in the adaptation to soil drought

Qian²,

et al. 2023

Food and Energy Security

View full text Add to dashboard Cite

show abstract

Synthesis and regulation of auxin and abscisic acid in maize

Cited by 12 publications

References 181 publications

5′-UTR allelic variants and expression of the lycopene-ɛ-cyclase <i>LCYE</i> gene in maize (<i>Zea mays</i> L.) inbred lines of Russian selection

5′-UTR allelic variants and expression of the lycopene-ɛ-cyclase <i>LCYE</i> gene in maize (<i>Zea mays</i> L.) inbred lines of Russian selection

Comparative Coexpression Analysis of Indole Synthase and Tryptophan Synthase A Reveals the Independent Production of Auxin via the Cytosolic Free Indole

Differential roles of abscisic acid in maize roots in the adaptation to soil drought

Contact Info

Product

Resources

About