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A Seed Coat Bedding Assay to Genetically Explore In Vitro How the Endosperm Controls Seed Germination in Arabidopsis thaliana
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Nitric Oxide Regulates Seed Germination by Integrating Multiple Signalling Pathways.

Yue Zhang1, Ruirui Wang1, Xiaodong Wang1

  • 1State Key Laboratory of Tree Genetics and Breeding, School of Forestry, Northeast Forestry University, Harbin 150040, China.

International Journal of Molecular Sciences
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Nitric oxide (NO) plays a crucial role in seed germination and plant stress tolerance. This review clarifies NO

Keywords:
abiotic stressnitric oxideplant hormonesseed dormancyseed germination

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Area of Science:

  • Plant Biology
  • Biochemistry
  • Molecular Biology

Background:

  • Nitric oxide (NO) is vital for plant development, acting as a nitrogen source and mediating stress responses.
  • NO influences seed germination by integrating various signaling pathways, but its regulatory network remains unclear due to its instability.
  • Understanding NO's role is crucial for improving crop yield and plant stress tolerance.

Purpose of the Study:

  • To summarize the anabolic processes of NO in plants.
  • To analyze the interactions between NO-triggered signaling pathways and plant hormones (ABA, GA, ET) and ROS.
  • To discuss NO's role in seed responses to abiotic stress.

Main Methods:

  • Literature review and synthesis of existing research on nitric oxide in plants.
  • Analysis of signaling pathways involving NO, plant hormones, and reactive oxygen species (ROS).
  • Examination of physiological and molecular mechanisms of NO in seed germination under abiotic stress.

Main Results:

  • NO is a key regulator of seed germination, interacting with abscisic acid (ABA), gibberellic acid (GA), ethylene (ET), and reactive oxygen species (ROS).
  • NO signaling is integral to plant responses to abiotic stresses like salinity, drought, and high temperatures.
  • The review elucidates the complex network of NO in modulating seed dormancy and stress tolerance.

Conclusions:

  • Nitric oxide (NO) is a critical signaling molecule in seed germination and plant adaptation to environmental stresses.
  • Further research into NO's regulatory network can help enhance seed dormancy release and improve plant stress resilience.
  • This review provides a comprehensive reference for understanding NO's multifaceted roles in plant science.