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Sugar utilization by developing wild type and shrunken-2 maize kernels.

B G Cobb1, L C Hannah

  • 1Vegetable Crops Department, IFAS, University of Florida, Gainesville, Florida 32611.

Plant Physiology
|March 1, 1986
PubMed
Summary
This summary is machine-generated.

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Maize seeds can develop using simple sugars, but prefer sucrose for better growth. Sucrose can directly enter kernel tissues, aiding in maize kernel development.

Area of Science:

  • Plant Physiology
  • Molecular Biology
  • Biochemistry

Background:

  • Maize (Zea mays L.) kernel development is crucial for agriculture.
  • Understanding sugar transport mechanisms in developing seeds is essential for crop improvement.

Purpose of the Study:

  • To investigate the utilization and transport of sugars during in vitro maize kernel development.
  • To compare the effects of sucrose versus reducing sugars on kernel growth and composition.

Main Methods:

  • Utilized a novel in vitro kernel development system.
  • Grew wild type and shrunken-2 (sh2) mutant maize kernels on culture media with different carbon sources (sucrose or reducing sugars).
  • Employed labeled sucrose to trace its movement into endosperm tissue.

Related Experiment Videos

Main Results:

  • Both wild type and sh2 maize kernels matured in vitro using either sucrose or reducing sugars.
  • Kernels grown with sucrose exhibited enhanced germination, starch content, and seed weight compared to those grown with reducing sugars.
  • Demonstrated that sucrose can be transported into endosperm tissue intact, without prior breakdown and resynthesis.

Conclusions:

  • Maize seeds can utilize both reducing sugars and sucrose for in vitro development.
  • Sucrose is the preferred carbon source for optimal maize kernel development, leading to improved yield parameters.
  • The direct uptake of intact sucrose into the endosperm is a key factor in efficient kernel development.