Thomas Dresselhaus
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View article: The secreted redox sensor roGFP2‐Orp1 reveals oxidative dynamics in the plant apoplast
The secreted redox sensor roGFP2‐Orp1 reveals oxidative dynamics in the plant apoplast Open
Specific generation of reactive oxygen species (ROS) is important for signalling and defence in many organisms. In plants, different types of ROS serve useful biological functions in the extracellular space (apoplast), influencing polymer …
View article: Spatial organization and trafficking dynamics of ANX/BUPS-RALF-LLG signaling complexes during pollen tube growth
Spatial organization and trafficking dynamics of ANX/BUPS-RALF-LLG signaling complexes during pollen tube growth Open
KEY MESSAGE: Recruitment of RALFs and LLGs for assembly at the apical plasma membrane of pollen tubes is orchestrated by ANXs/BUPSs through endomembrane trafficking. ABSTRACT: Pollen tube growth requires precise regulation of cell wall int…
View article: How meristems shape plant architecture in cereals—Cereal Stem Cell Systems (CSCS) Consortium
How meristems shape plant architecture in cereals—Cereal Stem Cell Systems (CSCS) Consortium Open
Meristems are major determinants of plant architecture, diversification, and acclimation to environmental stresses. Moreover, meristems play also a major role during crop domestication and are fundamentally important for the productivity o…
View article: Sexual reproduction in land plants: an evolutionary perspective
Sexual reproduction in land plants: an evolutionary perspective Open
Key message We link key aspects of land plant reproductive evolution and detail how successive molecular changes leading to novel tissues and organs require co-evolution of communication systems between tissues. Abstract The transition of …
View article: A two-step self-pollination mechanism maximizes fertility in Brassicaceae
A two-step self-pollination mechanism maximizes fertility in Brassicaceae Open
Self-pollination in self-compatible plant species often occurs prior to flower opening. By tracking the temporal progress of pollination in Arabidopsis, we observed that pollen predominantly targets the lateral region of the stigma in unop…
View article: Fertilization-induced synergid cell death by RALF12-triggered ROS production and ethylene signaling
Fertilization-induced synergid cell death by RALF12-triggered ROS production and ethylene signaling Open
Fertilization-dependent elimination of the persistent synergid cell is essential to block supernumerary pollen tubes and thus to avoid polyspermy in flowering plants. Little is known about the molecular mechanisms ensuring timely induction…
View article: The secreted redox sensor roGFP2-Orp1 reveals oxidative dynamics in the plant apoplast
The secreted redox sensor roGFP2-Orp1 reveals oxidative dynamics in the plant apoplast Open
Summary - Specific generation of reactive oxygen species (ROS) is important for signalling and defence in many organisms. In plants, different types of ROS serve useful biological functions in the extracellular space (apoplast), influencin…
View article: Integrative approaches to enhance reproductive resilience of crops for climate-proof agriculture
Integrative approaches to enhance reproductive resilience of crops for climate-proof agriculture Open
Worldwide agricultural systems are threatened by rising temperatures, extreme weather events, and shifting climate zones. Climate change-driven failure in sexual reproduction is a major cause for yield reduction in horticultural and grain …
View article: Maize stigmas react differently to self- and cross-pollination and fungal invasion
Maize stigmas react differently to self- and cross-pollination and fungal invasion Open
During sexual reproduction in flowering plants, tip-growing pollen tubes travel from the stigma inside the maternal tissues of the pistil toward ovules. In maize (Zea mays L.), the stigma is highly elongated, forming thread-like strands kn…
View article: Heat-stress-induced ROS in maize silks cause late pollen tube growth arrest and sterility
Heat-stress-induced ROS in maize silks cause late pollen tube growth arrest and sterility Open
The reproductive phase of plants is highly sensitive to ambient temperature stresses. To investigate sensitivity of female reproductive organs in grass crops during the pollination phase, we exposed the elongated stigma (silk) of maize to …
View article: Maize stigmas react differently to self-/cross-pollination and fungal invasion
Maize stigmas react differently to self-/cross-pollination and fungal invasion Open
During sexual reproduction in flowering plants, rapid tip-growing pollen tubes travel from the stigma inside the maternal tissues of the pistil towards ovules. In maize, the stigma is highly elongated forming thread-like strands known as s…
View article: Fertilization-induced synergid cell death by RALF12-triggered ROS production and ethylene signaling
Fertilization-induced synergid cell death by RALF12-triggered ROS production and ethylene signaling Open
Fertilization-dependent elimination of the persistent synergid cell is essential to block supernumerary pollen tubes and thus to avoid polyspermy in flowering plants. Little is known about the molecular mechanisms ensuring timely induction…
View article: Heat stress at the bicellular stage inhibits sperm cell development and transport into pollen tubes
Heat stress at the bicellular stage inhibits sperm cell development and transport into pollen tubes Open
For successful double fertilization in flowering plants (angiosperms), pollen tubes deliver 2 nonmotile sperm cells toward female gametes (egg and central cell, respectively). Heatwaves, especially during the reproduction period, threaten …
View article: The RALF signaling pathway regulates cell wall integrity during pollen tube growth in maize
The RALF signaling pathway regulates cell wall integrity during pollen tube growth in maize Open
Autocrine signaling pathways regulated by RAPID ALKALINIZATION FACTORs (RALFs) control cell wall integrity during pollen tube germination and growth in Arabidopsis (Arabidopsis thaliana). To investigate the role of pollen-specific RALFs in…
View article: RBPome identification in egg-cell like callus of <i>Arabidopsis</i>
RBPome identification in egg-cell like callus of <i>Arabidopsis</i> Open
RNA binding proteins (RBPs) have multiple and essential roles in transcriptional and posttranscriptional regulation of gene expression in all living organisms. Their biochemical identification in the proteome of a given cell or tissue requ…
View article: Heat stress at the bicellular stage inhibits sperm cell development and their transport into pollen tubes
Heat stress at the bicellular stage inhibits sperm cell development and their transport into pollen tubes Open
For a successful double fertilization process in flowering plants (angiosperms), pollen tubes each deliver two non-motile sperm cells towards female gametes (egg and central cell, respectively). Heatwaves especially during the reproduction…
View article: Cytosolic RGG RNA-binding proteins are temperature sensitive flowering time regulators in <i>Arabidopsis</i>
Cytosolic RGG RNA-binding proteins are temperature sensitive flowering time regulators in <i>Arabidopsis</i> Open
mRNA translation is tightly regulated by various classes of RNA-binding proteins (RBPs) during development and in response to changing environmental conditions. In this study, we characterize the arginine-glycine-glycine (RGG) motif contai…
View article: Signaling by the EPFL-ERECTA family coordinates female germline specification through the BZR1 family in Arabidopsis
Signaling by the EPFL-ERECTA family coordinates female germline specification through the BZR1 family in Arabidopsis Open
In most flowering plants, the female germline is initiated in the subepidermal L2 layer of ovule primordia forming a single megaspore mother cell (MMC). How signaling from the L1 (epidermal) layer could contribute to the gene regulatory ne…
View article: The RALF Signaling Pathway Regulates Cell Wall Integrity during Pollen Tube Growth in Maize
The RALF Signaling Pathway Regulates Cell Wall Integrity during Pollen Tube Growth in Maize Open
Autocrine signaling pathways regulated by RAPID ALKALINIZATION FACTORs (RALFs) control cell wall integrity during pollen tube germination and growth in Arabidopsis. To investigate the role of pollen-specific RALFs in another plant species,…
View article: A female in vivo haploid-induction system via mutagenesis of egg cell-specific peptidases
A female in vivo haploid-induction system via mutagenesis of egg cell-specific peptidases Open
Crop breeding schemes can be significantly accelerated by using (doubled) haploid plants. In vivo haploid induction has been applied in plant breeding for decades but is still not available for all crops and genotypes, and haploidization r…
View article: The egg cell is preferentially fertilized in <i>Arabidopsis</i> double fertilization
The egg cell is preferentially fertilized in <i>Arabidopsis</i> double fertilization Open
In flowering plants (angiosperms), fertilization of the egg cell by one sperm cell produces an embryo, whereas fusion of a second sperm cell with the central cell generates the endosperm. In most angiosperms like Arabidopsis , a pollen gra…
View article: KIL1 terminates fertility in maize by controlling silk senescence
KIL1 terminates fertility in maize by controlling silk senescence Open
Plant flowers have a functional life span during which pollination and fertilization occur to ensure seed and fruit development. Once flower senescence is initiated, the potential to set seed or fruit is irrevocably lost. In maize, silk st…
View article: A female in vivo haploid-induction system via mutagenesis of egg cell-specific peptidases
A female in vivo haploid-induction system via mutagenesis of egg cell-specific peptidases Open
Crop breeding schemes can be significantly accelerated by using (doubled) haploid plants. In vivo haploid induction has been applied in plant breeding since decades, but is still not available for all crops, genotypes and haploidization ra…