Plant development & epigenetic & metabolism
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Tip-localized receptors control pollen tube growth and LURE sensing in Arabidopsis : Nature

Tip-localized receptors control pollen tube growth and LURE sensing in Arabidopsis : Nature | Plant development & epigenetic & metabolism | Scoop.it
Directional control of tip-growing cells is essential for proper tissue organization and cell-to-cell communication in animals and plants1, 2. In the sexual reproduction of flowering plants, the tip growth of the male gametophyte, the pollen tube, is precisely guided by female cues to achieve fertilization3. Several female-secreted peptides have recently been identified as species-specific attractants that directly control the direction of pollen tube growth4, 5, 6. However, the method by which pollen tubes precisely and promptly respond to the guidance signal from their own species is unknown. Here we show that tip-localized pollen-specific receptor-like kinase 6 (PRK6) with an extracellular leucine-rich repeat domain is an essential receptor for sensing of the LURE1 attractant peptide in Arabidopsis thaliana under semi-in-vivo conditions, and is important for ovule targeting in the pistil. PRK6 interacted with pollen-expressed ROPGEFs (Rho of plant guanine nucleotide-exchange factors), which are important for pollen tube growth through activation of the signalling switch Rho GTPase ROP1 (refs 7, 8). PRK6 conferred responsiveness to AtLURE1 in pollen tubes of the related species Capsella rubella. Furthermore, our genetic and physiological data suggest that PRK6 signalling through ROPGEFs and sensing of AtLURE1 are achieved in cooperation with the other PRK family receptors, PRK1, PRK3 and PRK8. Notably, the tip-focused PRK6 accumulated asymmetrically towards an external AtLURE1 source before reorientation of pollen tube tip growth. These results demonstrate that PRK6 acts as a key membrane receptor for external AtLURE1 attractants, and recruits the core tip-growth machinery, including ROP signalling proteins. This work provides insights into the orchestration of efficient pollen tube growth and species-specific pollen tube attraction by multiple receptors during male–female communication.

Via Francis Martin
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Chemists find binding site of protein that allows plant growth - Phys

Chemists find binding site of protein that allows plant growth - Phys | Plant development & epigenetic & metabolism | Scoop.it
Using a new and super-sensitive instrument, researchers have discovered where a protein binds to plant cell walls, a process that loosens the cell walls and makes it possible for plants to grow.
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Researchers identify new target to boost plant resistance to insects and pathogens - EurekAlert (press release)

Researchers identify new target to boost plant resistance to insects and pathogens - EurekAlert (press release) | Plant development & epigenetic & metabolism | Scoop.it
Researchers identify new target to boost plant resistance to insects and pathogens EurekAlert (press release) Now, researchers reporting in the May 23 issue of the Cell Press journal Molecular Cell have discovered a gene in the jasmonate pathway...
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Epigenetic changes appear to be candidates as early stage biomarkers for ... - News-Medical.net

Epigenetic changes appear to be candidates as early stage biomarkers for ... - News-Medical.net | Plant development & epigenetic & metabolism | Scoop.it
Epigenetic changes appear to be candidates as early stage biomarkers for ...
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Leading Epigenetics Labs Across the World Contribute to Successful Beta Trial ... - Labmate Online

Leading Epigenetics Labs Across the World Contribute to Successful Beta Trial ... - Labmate Online | Plant development & epigenetic & metabolism | Scoop.it
Leading Epigenetics Labs Across the World Contribute to Successful Beta Trial ...
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Epigenetics: How a pregnant woman's diet shapes baby's health over time - The Hub at Johns Hopkins

89.3 KPCC Epigenetics: How a pregnant woman's diet shapes baby's health over time The Hub at Johns Hopkins What a pregnant woman eats or drinks is often a subject for public consumption, with everyone—including nosey strangers—weighing in on...
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Epigenetics & Chromatin | Abstract | Mapping genome-wide ...

Genome-wide maps of transcription factor binding sites in primary tissues can expand our understanding of genome function, transcriptional regulation, and genetic alterations that contribute to disease risk.
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Researchers examine mechanism determining plant height and leaf ...

Researchers examine mechanism determining plant height and leaf ... | Plant development & epigenetic & metabolism | Scoop.it
Japanese researchers from the National Institute of Advanced Industrial Science and Technology (AIST) have confirmed that the length of a plant cell is controlled by the antagonistic actions of three types of protein.
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Epigenetics – Forgotten Perhaps, But Not Gone | DNAeXplained ...

Epigenetics – Forgotten Perhaps, But Not Gone | DNAeXplained ... | Plant development & epigenetic & metabolism | Scoop.it
Recently, an extremely interesting article about epigenetics appeared in Discover magazine titled “Grandma's Experiences Leave a Mark on Your Genes.” The tag line says that your ancestors' lousy childhood or excellent ...
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