A Cascade of Sequentially Expressed Sucrose Transporters in the Seed Coat and Endosperm Provides Nutrition for the Arabidopsis Embryo

Chen, Lei; Lin, I. Winnie; Qu, Xiao Qing; Sosso, Davide; McFarlane, Heather E.; Tobón, Amalia Londoño; Samuels, A. Lacey; Frommer, Wolf B.

doi:10.1105/tpc.114.134585

Cited by 337 publications

(329 citation statements)

References 51 publications

Supporting

Mentioning

319

Contrasting

Unclassified

Order By: Relevance

“…Notably, although SAG29 transcripts strongly accumulate during senescence, a translational fusion protein is barely detectable in leaves undergoing senescence. On the other hand, SAG29 is present in developing seeds (Chen et al, 2015), indicating that SAG29 might control sink strength. Therefore, the early-senescence phenotype of SAG29 overexpression plants can be explained by the interference of SAG29 with sink-source interactions (Chen et al, 2015).…”

Section: Salt Stressmentioning

confidence: 99%

“…On the other hand, SAG29 is present in developing seeds (Chen et al, 2015), indicating that SAG29 might control sink strength. Therefore, the early-senescence phenotype of SAG29 overexpression plants can be explained by the interference of SAG29 with sink-source interactions (Chen et al, 2015). Consistent with this notion, overexpressing an apoplastic invertase gene (causing increased sink strength) results in improved salinity tolerance in Nicotiana benthamiana (Fukushima et al, 2001).…”

Section: Salt Stressmentioning

confidence: 99%

See 1 more Smart Citation

Living to Die and Dying to Live: The Survival Strategy behind Leaf Senescence

et al. 2015

View full text Add to dashboard Cite

ORCID ID: 0000-0001-7934-126X (J.H.M.S.).Senescence represents the final developmental act of the leaf, during which the leaf cell is dismantled in a coordinated manner to remobilize nutrients and to secure reproductive success. The process of senescence provides the plant with phenotypic plasticity to help it adapt to adverse environmental conditions. Here, we provide a comprehensive overview of the factors and mechanisms that control the onset of senescence. We explain how the competence to senesce is established during leaf development, as depicted by the senescence window model. We also discuss the mechanisms by which phytohormones and environmental stresses control senescence as well as the impact of source-sink relationships on plant yield and stress tolerance. In addition, we discuss the role of senescence as a strategy for stress adaptation and how crop production and food quality could benefit from engineering or breeding crops with altered onset of senescence.

show abstract

Section: Salt Stressmentioning

confidence: 99%

Section: Salt Stressmentioning

confidence: 99%

Living to Die and Dying to Live: The Survival Strategy behind Leaf Senescence

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Consistent with this hypothesis, we detected starch granules in the nucellus. Nevertheless, nutrients were shown to travel to the endosperm and embryo via the seed coat (Stadler et al, 2005;Chen et al, 2015). Further analyses are necessary to determine whether nutrients are allocated to the endosperm also through the nucellus.…”

Section: Developmental Progression Of Nucellus Degenerationmentioning

confidence: 99%

Endosperm and Nucellus Develop Antagonistically in Arabidopsis Seeds

et al. 2016

View full text Add to dashboard Cite

In angiosperms, seed architecture is shaped by the coordinated development of three genetically different components: embryo, endosperm, and maternal tissues. The relative contribution of these tissues to seed mass and nutrient storage varies considerably among species. The development of embryo, endosperm, or nucellus maternal tissue as primary storage compartments defines three main typologies of seed architecture. It is still debated whether the ancestral angiosperm seed accumulated nutrients in the endosperm or the nucellus. During evolution, plants shifted repeatedly between these two storage strategies through molecular mechanisms that are largely unknown. Here, we characterize the regulatory pathway underlying nucellus and endosperm tissue partitioning in Arabidopsis thaliana. We show that Polycomb-group proteins repress nucellus degeneration before fertilization. A signal initiated in the endosperm by the AGAMOUS-LIKE62 MADS box transcription factor relieves this Polycomb-mediated repression and therefore allows nucellus degeneration. Further downstream in the pathway, the TRANSPARENT TESTA16 (TT16) and GORDITA MADS box transcription factors promote nucellus degeneration. Moreover, we demonstrate that TT16 mediates the crosstalk between nucellus and seed coat maternal tissues. Finally, we characterize the nucellus cell death program and its feedback role in timing endosperm development. Altogether, our data reveal the antagonistic development of nucellus and endosperm, in coordination with seed coat differentiation.

show abstract

“…Thus, it is possible that hexose, derived from maternal VIN and CWIN activities, is the major carbon source transported into the filial tissues of developing cotton seed. Indeed, hexose could dominate over Suc in their import into endosperm during early seed development in Arabidopsis Chen et al, 2015) and maize . These findings underpin the importance of sucrolytic activities in channeling carbon from maternal to filial tissues.…”

Section: Vin Contributes To Male Fertility Probably By Impacting Starmentioning

confidence: 99%

Critical Roles of Vacuolar Invertase in Floral Organ Development and Male and Female Fertilities Are Revealed through Characterization of GhVIN1-RNAi Cotton Plants

Wang

Ruan

2016

Plant Physiol.

View full text Add to dashboard Cite

Seed number and quality are key traits determining plant fitness and crop yield and rely on combined competence in male and female fertilities. Sucrose metabolism is central to reproductive success. It remains elusive, though, how individual sucrose metabolic enzymes may regulate the complex reproductive processes. Here, by silencing vacuolar invertase (VIN) genes in cotton (Gossypium hirsutum) reproductive organs, we revealed diverse roles that VIN plays in multiple reproductive processes. A set of phenotypic and genetic studies showed significant reductions of viable seeds in GhVIN1-RNAi plants, attributed to pollination failure and impaired male and female fertilities. The former was largely owing to the spatial mismatch between style and stamen and delayed pollen release from the anthers, whereas male defects came from poor pollen viability. The transgenic stamen exhibited altered expression of the genes responsible for starch metabolism and auxin and jasmonic acid signaling. Further analyses identified the reduction of GhVIN expression in the seed coat as the major cause for the reduced female fertility, which appeared to disrupt the expression of some key genes involved in trehalose and auxin metabolism and signaling, leading to programmed cell death or growth repression in the filial tissues. Together, the data provide an unprecedented example of how VIN is required to synchronize style and stamen development and the formation of male and female fertilities for seed development in a crop species, cotton.

show abstract

A Cascade of Sequentially Expressed Sucrose Transporters in the Seed Coat and Endosperm Provides Nutrition for the Arabidopsis Embryo

Cited by 337 publications

References 51 publications

Living to Die and Dying to Live: The Survival Strategy behind Leaf Senescence

Living to Die and Dying to Live: The Survival Strategy behind Leaf Senescence

Endosperm and Nucellus Develop Antagonistically in Arabidopsis Seeds

Critical Roles of Vacuolar Invertase in Floral Organ Development and Male and Female Fertilities Are Revealed through Characterization of GhVIN1-RNAi Cotton Plants

Contact Info

Product

Resources

About