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The DOI matches its Crossref record; 35 of the 35 references it cites were found in a registry or an index.

Abscisic acid signal transduction in guard cells is mediated by phospholipase D activity

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Jacob, Tobias, Ritchie, Sian, Assmann, Sarah M., Gilroy, Simon·1999·Proceedings of the National Academy of Sciences

Abstract

In guard cells, the plant hormone abscisic acid (ABA) inhibits stomatal opening and induces stomatal closure through the coordinated regulation of ion transport. Despite this central role of ABA in regulating stomatal function, the signal transduction events leading to altered ion fluxes remain incompletely understood. We report that the activity of the enzyme phospholipase D (PLD) transiently increased in guard cell protoplasts at 2.5 and 25 min after ABA application. Treatment of guard cell protoplasts with phosphatidic acid (PtdOH), one of the products of PLD activity, led to an inhibition of the activity of the inward K + channel. PtdOH also induced stomatal closure and inhibited stomatal opening when added to epidermal peels. Application of 1-butanol (1-buOH), a selective inhibitor of PtdOH production by PLD, inhibited the increase in PtdOH production elicited by ABA. 1-BuOH treatment also partially prevented ABA-induced stomatal closure and ABA-induced inhibition of stomatal opening. This inhibitory effect of buOH was enhanced by simultaneous application of nicotinamide, an inhibitor of cADP ribose action. These results suggest that in the guard cell, ABA activates the enzyme PLD, which leads to the production of PtdOH. This PtdOH is then involved in triggering subsequent ABA responses of the cell via a pathway operating in parallel to cADP ribose-mediated events.

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Crossref · 10.1073/pnas.96.21.12192

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Metadata

Authors
Jacob, T., Ritchie, S., Assmann, S. M., & Gilroy, S.
Venue
Proceedings of the National Academy of Sciences
Published
1999-10-12
Volume
96
Issue
21
Pages
12192-12197
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2017267000
Cited by
288
References
35
FWCI
31.31
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Abscisic acid signal transduction in guard cells is mediated by phospholipase D activity. https://app.cochat.ai/papers/10.1073/pnas.96.21.12192
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Jacob, T., Ritchie, S., Assmann, S. M., & Gilroy, S. (1999). Abscisic acid signal transduction in guard cells is mediated by phospholipase D activity. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.96.21.12192

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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