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Structural Characterization of Mannan Cell Wall Polysaccharides in Plants Using PACE
Published on: October 16, 2017
Softening-up mannan-rich cell walls
María del Carmen Rodríguez-Gacio1, Raquel Iglesias-Fernández, Pilar Carbonero
1Pharmacy, Department of Plant Physiology, University of Santiago de Compostela, 15782-Santiago de Compostela, Spain.
Journal of Experimental Botany
|May 4, 2012
Summary
Mannans and mannanases are crucial for plant cell wall modification during seed germination and development. These enzymes also offer significant biotechnological applications for various industries.
Area of Science:
- Plant Biology
- Biochemistry
- Molecular Biology
Background:
- Cell wall (CW) softening and degradation, often mannan-rich, are vital in plant development, including meristematic growth, fruit ripening, and seed germination.
- Mannans, particularly galactomannans (Gal-mannans), are key hemicellulosic polymers in plant endosperm cell walls and are also found in green algae.
- Endo-β-mannanases (MANs) are hydrolytic enzymes that break down the mannan backbone, playing a critical role in cell wall loosening and remodeling.
Purpose of the Study:
- To review and discuss the significance of mannans and MANs in seeds.
- To explore the biotechnological potential of MAN enzymes.
Main Methods:
- Literature review of scientific publications on mannans and MANs in plants and algae.
- Analysis of the roles of MAN enzymes in seed germination, development, and nutrient mobilization.
- Evaluation of current and potential biotechnological applications of MAN enzymes.
Main Results:
- Mannans are essential structural components and storage polysaccharides in seed endosperms.
- MANs are critical for endosperm cell wall softening, facilitating radicle emergence during germination.
- MANs contribute to nutrient mobilization from Gal-mannans for early seedling growth.
Conclusions:
- Mannans and MANs play a decisive role in the life cycle of seeds, impacting germination and seedling establishment.
- MAN enzymes possess significant and growing biotechnological potential for various industrial applications.
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