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The hot issue: TOR signalling network in plants.

Ying Zhao1, Xiu-Qin Wang2

  • 1College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China.

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Summary
This summary is machine-generated.

The target of rapamycin (TOR) signaling network regulates plant growth and sugar metabolism. This review analyzes TOR

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Area of Science:

  • Plant biology
  • Molecular signaling
  • Metabolic regulation

Background:

  • The target of rapamycin (TOR) signaling network is crucial for regulating sugar metabolism and lifespan across various organisms, including plants.
  • In plants, the TOR complex consists of TOR, RAPTOR, and LST8, and is activated by environmental cues like light, auxin, glucose, sucrose, and amino acids.
  • TOR signaling influences downstream factors that promote plant cell proliferation and growth.

Purpose of the Study:

  • To review the TOR signaling network in plants.
  • To discuss the interplay between glucose and TOR signaling.
  • To explore the balance between TOR and sucrose-non-fermenting-related protein kinases (SnRKs).

Main Methods:

  • Literature review of existing studies on the TOR signaling network in plants.
  • Analysis of upstream signals activating TOR, including light, auxin, glucose, sucrose, and amino acids.
  • Discussion of downstream phosphorylation events regulated by TOR.

Main Results:

  • TOR signaling is a key regulator of plant growth and sugar metabolism.
  • Upstream signals like glucose and sucrose directly influence TOR activity.
  • A dynamic balance exists between TOR and SnRKs in plant systems.
  • Previous studies identified 63 novel TOR-regulated proteins, indicating extensive regulatory roles.

Conclusions:

  • The TOR signaling network is a central hub for integrating metabolic and growth signals in plants.
  • Further investigation is needed to uncover the full spectrum of TOR's functions and its interactions with other signaling pathways.
  • Understanding TOR signaling is vital for comprehending plant responses to nutrient availability and developmental cues.