The Ins and Outs of the Rice AGAMOUS Subfamily

Dreni, Ludovico; Osnato, Michela; Kater, Martin M.

doi:10.1093/mp/sst019

Cited by 28 publications

(23 citation statements)

References 126 publications

(155 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Genes of the AGAMOUS (AG) subfamily have been shown to play crucial roles in reproductive organ identity, as well as fruit and seed development [47,48]. In agreement with our results for ‘Kyoho’ and ‘Thompson Seedless’ cultivars, it has been found previously that AG is up-regulated in inflorescence apices after GA treatment [49].…”

Section: Discussionsupporting

confidence: 91%

Effect of GA3 Treatment on Seed Development and Seed-Related Gene Expression in Grape

Cheng

Singer

et al. 2013

PLoS ONE

View full text Add to dashboard Cite

BackgroundThe phytohormone gibberellic acid (GA3) is widely used in the table grape industry to induce seedlessness in seeded varieties. However, there is a paucity of information concerning the mechanisms by which GAs induce seedlessness in grapes.Methodology/Principal FindingsIn an effort to systematically analyze the cause of this GA3-induced seed abortion, we conducted an in depth characterization of two seeded grape cultivars (‘Kyoho’ and ‘Red Globe’), along with a seedless cultivar (‘Thompson Seedless’), following treatment with GA3. In a similar fashion to the seedless control, which exhibited GA3-induced abortion of the seeds 9 days after full bloom (DAF), both ‘Kyoho’ and ‘Red Globe’ seeded varieties exhibited complete abortion of the seeds 15 DAF when treated with GA3. Morphological analyses indicated that while fertilization appeared to occur normally following GA3 treatment, as well as in the untreated seedless control cultivar, seed growth eventually ceased. In addition, we found that GA3 application had an effect on redox homeostasis, which could potentially cause cell damage and subsequent seed abortion. Furthermore, we carried out an analysis of antioxidant enzyme activities, as well as transcript levels from various genes believed to be involved in seed development, and found several differences between GA3-treated and untreated controls.ConclusionTherefore, it seems that the mechanisms driving GA3-induced seedlessness are similar in both seeded and seedless cultivars, and that the observed abortion of seeds may result at least in part from a GA3-induced increase in cell damage caused by reactive oxygen species, a decrease in antioxidant enzymatic activities, and an alteration of the expression of genes related to seed development.

show abstract

Section: Discussionsupporting

confidence: 91%

Effect of GA3 Treatment on Seed Development and Seed-Related Gene Expression in Grape

Cheng

Singer

et al. 2013

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…They appear to be paraphyletic with respect to the angiosperm C and D lineages, but the three clades that they form have strong supports (Figure 5). Both angiosperm gene lineages underwent additional duplications in the grasses that for the most part have two AG/SHP gene clades and two STK gene clades (Dreni et al, 2013). The STK genes have remained mostly single copy in all other angiosperms including basal angiosperms and basal and core eudicots, with only two exceptions.…”

Section: Resultsmentioning

confidence: 99%

“…Basal eudicots and monocots have only one type of AG genes, known as the paleoAG genes, that in general only play early roles in stamen and carpel identity (Dreni et al, 2007, 2013; Yellina et al, 2010; Hands et al, 2011). Interestingly the basal eudicot paralogous genes that have been characterized in Eschscholzia and Papaver , are the result of a taxon-specific duplication in Eschscholzia and alternative splicing in Papaver .…”

Section: Discussionmentioning

confidence: 99%

Evolution of fruit development genes in flowering plants

2014

View full text Add to dashboard Cite

The genetic mechanisms regulating dry fruit development and opercular dehiscence have been identified in Arabidopsis thaliana. In the bicarpellate silique, valve elongation and differentiation is controlled by FRUITFULL (FUL) that antagonizes SHATTERPROOF1-2 (SHP1/SHP2) and INDEHISCENT (IND) at the dehiscence zone where they control normal lignification. SHP1/2 are also repressed by REPLUMLESS (RPL), responsible for replum formation. Similarly, FUL indirectly controls two other factors ALCATRAZ (ALC) and SPATULA (SPT) that function in the proper formation of the separation layer. FUL and SHP1/2 belong to the MADS-box family, IND and ALC belong to the bHLH family and RPL belongs to the homeodomain family, all of which are large transcription factor families. These families have undergone numerous duplications and losses in plants, likely accompanied by functional changes. Functional analyses of homologous genes suggest that this network is fairly conserved in Brassicaceae and less conserved in other core eudicots. Only the MADS box genes have been functionally characterized in basal eudicots and suggest partial conservation of the functions recorded for Brassicaceae. Here we do a comprehensive search of SHP, IND, ALC, SPT, and RPL homologs across core-eudicots, basal eudicots, monocots and basal angiosperms. Based on gene-tree analyses we hypothesize what parts of the network for fruit development in Brassicaceae, in particular regarding direct and indirect targets of FUL, might be conserved across angiosperms.

show abstract

“…As we did detect well‐supported associations between previously identified rice SEP1 ‐like ( OsMADS1 , OsMADS5 and OsMADS34 ) and SEP3 ‐like ( OsMADS7 , OsMADS8 ) genes and putative wheat orthologs, we used those associations to identify wheat SEP1 ‐ and SEP3 ‐like genes. We used a similar strategy to identify AG ‐ and STK ‐like genes from wheat (Kramer et al ., ; Dreni et al ., ; Gramzow & Theissen, ).…”

Section: Methodsmentioning

confidence: 99%

Genome‐wide analysis of MIKC‐type MADS‐box genes in wheat: pervasive duplications, functional conservation and putative neofunctionalization

et al. 2019

View full text Add to dashboard Cite

Summary Wheat (Triticum aestivum) is one of the most important crops worldwide. Given a growing global population coupled with increasingly challenging cultivation conditions, facilitating wheat breeding by fine‐tuning important traits is of great importance. MADS‐box genes are prime candidates for this, as they are involved in virtually all aspects of plant development. Here, we present a detailed overview of phylogeny and expression of 201 wheat MIKC‐type MADS‐box genes. Homoeolog retention is significantly above the average genome‐wide retention rate for wheat genes, indicating that many MIKC‐type homoeologs are functionally important and not redundant. Gene expression is generally in agreement with the expected subfamily‐specific expression pattern, indicating broad conservation of function of MIKC‐type genes during wheat evolution. We also found extensive expansion of some MIKC‐type subfamilies, especially those potentially involved in adaptation to different environmental conditions like flowering time genes. Duplications are especially prominent in distal telomeric regions. A number of MIKC‐type genes show novel expression patterns and respond, for example, to biotic stress, pointing towards neofunctionalization. We speculate that conserved, duplicated and neofunctionalized MIKC‐type genes may have played an important role in the adaptation of wheat to a diversity of conditions, hence contributing to the importance of wheat as a global staple food.

show abstract

The Ins and Outs of the Rice AGAMOUS Subfamily

Cited by 28 publications

References 126 publications

Effect of GA3 Treatment on Seed Development and Seed-Related Gene Expression in Grape

Effect of GA3 Treatment on Seed Development and Seed-Related Gene Expression in Grape

Evolution of fruit development genes in flowering plants

Genome‐wide analysis of MIKC‐type MADS‐box genes in wheat: pervasive duplications, functional conservation and putative neofunctionalization

Contact Info

Product

Resources

About