Extracellular ATP in Plants. Visualization, Localization, and Analysis of Physiological Significance in Growth and Signaling1[W] (Record no. 42623)

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control field MX-MdCICY
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control field 20250625124718.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-8319
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Title Extracellular ATP in Plants. Visualization, Localization, and Analysis of Physiological Significance in Growth and Signaling1[W]
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Volume/sequential designation Plant Physiology, 143(3), p.984-992, 2006
520 3# - SUMMARY, ETC.
Summary, etc. Extracellular ATP (eATP)in animals is well documented and known to play an important role in cellular signaling (e.g. at the nerve synapse). The existence of eATP has been postulated in plants; however, there is no definitive experimental evidence for its presence or an explanation as to how such a polar molecule could exit the plant cell and what physiological role it may play in plant growth and development. The presence of eATP in plants (Medicago truncatula)was detected by constructing a novel reporter; i.e. fusing a cellulose-binding domain peptide to the ATP-requiring enzyme luciferase. Application of this reporter to plant roots allowed visualization of eATP in the presence of the substrate luciferin. Luciferase activity could be detected in the interstitial spaces between plant epidermal cells and predominantly at the regions of actively growing cells. The levels of eATP were closely correlated with regions of active growth and cell expansion. Pharmacological compounds known to alter cytoplasmic calcium levels revealed that ATP release is a calcium-dependent process and may occur through vesicular fusion, an important step in the polar growth of actively growing root hairs. Reactive oxygen species (ROS)activity at the root hair tip is not only essential for root hair growth, but also dependent on the cytoplasmic calcium levels. Whereas application of exogenousATP and a chitin mixture increased ROS activity in root hairs, no changes were observed in response to adenosine, AMP, ADP, and nonhydrolyzable ATP (bgmeATP). However, application of exogenous potato (Solanum tuberosum)apyrase (ATPase)decreased ROS activity, suggesting that cytoplasmic calcium gradients and ROS activity are closely associated with eATP release.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Kim, S.Y.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Sivaguru, M.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Stacey, G.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1qKQQf9ml-LPPE3iPad7vYNBdd3FXHPLk/view?usp=drivesdk">https://drive.google.com/file/d/1qKQQf9ml-LPPE3iPad7vYNBdd3FXHPLk/view?usp=drivesdk</a>
Public note Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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Source of classification or shelving scheme Clasificación local
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-8319 25.06.2025 25.06.2025 Documentos solicitados