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Cultivation of Green Microalgae in Bubble Column Photobioreactors and an Assay for Neutral Lipids

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Hydrogen fuel production by transgenic microalgae.

Anastasios Melis¹, Michael Seibert, Maria L Ghirardi

¹University of California, Department of Plant and Microbial Biology, 111 Koshland Hall, Berkeley, California 94720-3102, USA. melis@nature.berkeley.edu

Advances in Experimental Medicine and Biology

|December 29, 2007

Summary

This summary is machine-generated.

Green algae can produce hydrogen fuel through genetic engineering and physiological approaches. Strategies include sulfur deprivation, optimizing light utilization, and enhancing hydrogenase activity for commercial viability.

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Area of Science:

Biotechnology
Renewable Energy
Microalgal Physiology

Background:

Green algae are photosynthetic microorganisms with potential for clean hydrogen fuel production.
Current limitations in hydrogen production efficiency and stability hinder commercial application.

Purpose of the Study:

To review state-of-the-art green algal hydrogen (H2) production.
To examine physiological and genetic engineering strategies for improving microalgal H2 metabolism.

Main Methods:

Investigating sulfur-nutrient deprivation to reduce oxygen evolution and enhance H2 production.
Utilizing genetic engineering of sulfate uptake in Chlamydomonas reinhardtii.
Exploring the application of hydrogenase assembly genes for H2 production in other algae.
Developing strategies to overcome oxygen sensitivity of algal hydrogenases.
Examining starch accumulation and light utilization optimization in transgenic microalgae.

Main Results:

Sulfur deprivation and genetic manipulation of sulfate permease can promote H2 production.
Transferring hydrogenase assembly genes may confer H2 production capacity to other microalgae.
Engineering oxygen tolerance in hydrogenases offers an alternative to sulfur deprivation.
Optimizing light utilization in transgenic strains enhances H2 production under mass culture.

Conclusions:

Genetic engineering and physiological modifications significantly improve prospects for commercial H2 generation from green algae.
Transgenic green algae hold promise as a sustainable platform for clean fuel production.