Guard cell ABA and CO2 signaling network updates and Ca2+ sensor priming hypothesis

Maria Israelsson, Robert S. Siegel, Jared Young, Mimi Hashimoto, Koh Iba, Julian I. Schroeder

Research output: Contribution to journalReview articlepeer-review

144 Citations (Scopus)


Stomatal pores in the epidermis of plants enable gas exchange between plants and the atmosphere, a process vital to plant life. Pairs of specialized guard cells surround and control stomatal apertures. Stomatal closing is induced by abscisic acid (ABA) and elevated CO2 concentrations. Recent advances have been made in understanding ABA signaling and in characterizing CO2 transduction mechanisms and CO2 signaling mutants. In addition, models of Ca2+-dependent and Ca2+-independent signaling in guard cells have been developed and a new hypothesis has been formed in which physiological stimuli are proposed to prime Ca2+ sensors, thus enabling specificity in Ca2+-dependent signal transduction.

Original languageEnglish
Pages (from-to)654-663
Number of pages10
JournalCurrent Opinion in Plant Biology
Issue number6
Publication statusPublished - Dec 2006

All Science Journal Classification (ASJC) codes

  • Plant Science


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