An AGAMOUS MADS-box protein, SlMBP3, regulates the speed of placenta liquefaction and controls seed formation in tomato

Zhang, Jianling; Wang, Yicong; Naeem, Muhammad; Zhu, Mingku; Li, Jing; Yu, Xiaohui; Hu, Zongli; Chen, Guoping

doi:10.1093/jxb/ery418

Cited by 46 publications

(56 citation statements)

References 110 publications

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“…Recent studies have revealed that the seed size of plants is correlated with lignin content. Overexpression of a tomato ( Solanum lycopersicum ) AGAMOUS MADS‐box gene, SlMBP3 , leads to a 60% increase in lignin content and larger seeds; in contrast, SlMBP3‐ RNA interference (iRNA) lines exhibit remarkably lower lignin content than wild type and produce extremely malformed seeds with no seed coat (Zhang et al, 2019a). Similarly, overexpression of the PP2A regulatory subunit Tap46 induces the transcription of genes involved lignin biosynthesis and enhances seed size in A. thaliana (Ahn et al, 2015), and in rice a lower lignin content is associated with smaller spikelet size (Zhao et al, 2016; Dong et al, 2020).…”

Section: Biofunctions Of Phenylpropanoid Metabolitesmentioning

confidence: 99%

Contribution of phenylpropanoid metabolism to plant development and plant–environment interactions

Dong

Lin

2021

JIPB

828

429

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Phenylpropanoid metabolism is one of the most important metabolisms in plants, yielding more than 8,000 metabolites contributing to plant development and plant-environment interplay. Phenylpropanoid metabolism materialized during the evolution of early freshwater algae that were initiating terrestrialization and land plants have evolved multiple branches of this pathway, which give rise to metabolites including lignin, flavonoids, lignans, phenylpropanoid esters, hydroxycinnamic acid amides, and sporopollenin. Recent studies have revealed that many factors participate in the regulation of phenylpropanoid metabolism, and modulate phenylpropanoid homeostasis when plants undergo successive developmental processes and are subjected to stressful environments. In this review, we summarize recent progress on elucidating the contribution of phenylpropanoid metabolism to the coordination of plant development and plantenvironment interaction, and metabolic flux redirection among diverse metabolic routes. In addition, our review focuses on the regulation of phenylpropanoid metabolism at the transcriptional, post-transcriptional, post-translational, and epigenetic levels, and in response to phytohormones and biotic and abiotic stresses.

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Section: Biofunctions Of Phenylpropanoid Metabolitesmentioning

confidence: 99%

Contribution of phenylpropanoid metabolism to plant development and plant–environment interactions

Dong

Lin

2021

JIPB

828

429

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“…This might provide an ideal material to uncover the complex mechanism involved in the process of locule development. This mutation also offers several advantages for the tomato processing industry such as its high solid content, improved firmness, long shelf-life, color, and flavor over wild-type tomato (Macua et al, 2015;Silvestri, 2006;Zhang et al, 2019). Therefore, the exploration of AFF may be quite important, not only for the elucidation of berry fruit formation, but also for breeding programs.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, in tomato fruit, Tomato AGAMOUS-LIKE1 (TAGL1), an SHP orthologous gene, controls fruit expansion and fleshiness (Vrebalov et al, 2009). More recently, the D-class gene AGAMOUS MADS-box protein 3 (SlMBP3)-a paralog of TAGL1-showed direct evidence for the liquefaction of tomato locule tissue (Zhang et al 2019). Moreover, although previous studies indicated that AGL genes can control the formation of fleshy fruit, and slMBP3 impacts the formation of locule gel in tomato, the genetic evolution and regulatory mechanism of the transformation from juiceless to juicy fruit are still unclear.…”

Section: Introductionmentioning

confidence: 99%

All-Flesh Tomato Regulated by Reduced Dosage ofAFFProvides New Insights into Berry Fruit Evolution

Liu

Zhang

Bai

et al. 2021

Preprint

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The formation of locule gel is not only an important developmental process in tomato but also a typical characteristic of berry fruit. In this study, we collected a tomato material that produces all-flesh fruits (AFF), whose locule tissue remains in a solid state during fruit development. We built genetic populations to fine map the causal gene of AFF trait, investigate the function of AFF gene, and identified it as the causal locus conferring the locule gel formation. We determined the causal mutation as a 416-bp deletion that occurred in the promoter region of AFF, which reduces the expression dosage of AFF. The 416-bp deleted sequence has a high level of conservation among closely related Solanaceae species, as well as in the tomato population. The activity of the 416-bp deletion in down-regulating gene expression was further verified by the relative activity in a luciferase experiment. Furthermore, with the BC6 NIL materials, we reveal that the reduced expression dosage of AFF does not impact the normal development of seeds, while produces non-liquefied locule tissue, which is distinct from that of the normal tomatoes in terms of metabolic components. Based on these findings, we propose that the AFF gene is the core node in locule tissue liquefaction, whose function cannot be compensated by its paralogs TAG1, TAGL1, or TAGL11. Our findings provide clues to investigate fruit type differentiation among Solanaceae crops, and also contributes to the breeding application of all flesh fruit tomatoes for the tomato processing industry.One Sentence SummaryThe sequence deletion that occurred in the cis-regulatory region of AFF—the core node of locule tissue liquefaction determined here—reduced its expression dosage, and produced all flesh fruit tomato.

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“…Flowers are the reproductive organs of a plant, which are regarded as an important morphological innovation in plant evolution. The MADS-box transcription factors are key elements in floral organ identity [ 1 , 2 ], fruit and seed development [ 3 , 4 ], and leaf and root development as well [ 5 , 6 ]. Based on the genetic studies, a well-known ABCDE model is introduced to explain genetic regulation in floral organ determination.…”

Section: Introductionmentioning

confidence: 99%

Identification, characterization and functional analysis of AGAMOUS subfamily genes associated with floral organs and seed development in Marigold (Tagetes erecta)

et al. 2020

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Background AGAMOUS (AG) subfamily genes regulate the floral organs initiation and development, fruit and seed development. At present, there has been insufficient study of the function of AG subfamily genes in Asteraceae. Marigold (Tagetes erecta) belongs to Asteraceae family whose unique inflorescence structure makes it an important research target for understanding floral organ development in plants. Results Four AG subfamily genes of marigold were isolated and phylogenetically grouped into class C (TeAG1 and TeAG2) and class D (TeAGL11–1 and TeAGL11–2) genes. Expression profile analysis demonstrated that these four genes were highly expressed in reproductive organs of marigold. Subcellular localization analysis suggested that all these four proteins were located in the nucleus. Protein-protein interactions analysis indicated that class C proteins had a wider interaction manner than class D proteins. Function analysis of ectopic expression in Arabidopsis thaliana revealed that TeAG1 displayed a C function specifying the stamen identity and carpel identity, and that TeAGL11–1 exhibited a D function regulating seed development and petal development. In addition, overexpression of both TeAG1 and TeAGL11–1 leaded to curling rosette leaf and early flowering in Arabidopsis thaliana. Conclusions This study provides an insight into molecular mechanism of AG subfamily genes in Asteraceae species and technical support for improvement of several floral traits.

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An AGAMOUS MADS-box protein, SlMBP3, regulates the speed of placenta liquefaction and controls seed formation in tomato

Cited by 46 publications

References 110 publications

Contribution of phenylpropanoid metabolism to plant development and plant–environment interactions

Contribution of phenylpropanoid metabolism to plant development and plant–environment interactions

All-Flesh Tomato Regulated by Reduced Dosage ofAFFProvides New Insights into Berry Fruit Evolution

Identification, characterization and functional analysis of AGAMOUS subfamily genes associated with floral organs and seed development in Marigold (Tagetes erecta)

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