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Form, development and function of grass stomata.

Tiago D G Nunes1, Dan Zhang1, Michael T Raissig1

  • 1Centre for Organismal Studies Heidelberg, Heidelberg University, 69120, Heidelberg, Germany.

The Plant Journal : for Cell and Molecular Biology
|October 2, 2019
PubMed
Summary
This summary is machine-generated.

Grass stomata possess a unique four-celled structure, enhancing water efficiency. Studying these graminoid stomata (singular: stoma) can improve crop resilience to drought and climate change.

Keywords:
developmentfunctiongrasses/Poaceaeguard cellsmorphologystomatasubsidiary cells

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Area of Science:

  • Plant Biology
  • Developmental Genetics
  • Physiology

Background:

  • Stomata are essential leaf pores regulating gas exchange (CO2 uptake) and water loss (transpiration).
  • Grasses (Poaceae) exhibit a distinct 'graminoid' stomatal morphology featuring dumbbell-shaped guard cells and flanking subsidiary cells (SCs).
  • This specialized structure is linked to rapid stomatal responses and improved water-use efficiency, crucial for survival in fluctuating environments.

Purpose of the Study:

  • To explore the genetic and mechanistic basis of the unique graminoid stomatal form in grasses.
  • To investigate the developmental processes involved in grass stomatal cell lineage initiation, SC recruitment, and morphogenesis.
  • To summarize the functional implications of the four-celled graminoid stomatal structure and identify key regulators of stomatal function.

Main Methods:

  • Genetic analysis of stomatal development in grasses.
  • Mechanistic studies on stomatal cell lineage and morphogenesis.
  • Compilation and synthesis of known factors regulating stomatal opening and closing mechanisms.

Main Results:

  • Detailed examination of the developmental innovations leading to the specialized graminoid stomatal structure.
  • Identification of genetic and molecular players involved in grass stomatal development and function.
  • Summary of functional consequences, including enhanced water-use efficiency through faster stomatal movements.

Conclusions:

  • The graminoid stomatal morphology represents a significant evolutionary innovation in grasses.
  • Understanding the mechanisms of these functionally superior stomata can provide insights into improving plant water-stress resilience.
  • This research highlights potential strategies for enhancing the resilience of agriculturally important plants in a changing climate.