Engineered light-harvesting antennae
Physiological and biochemical adaptations for conditions of low light, including tightly stacked thylakoids and large light-harvesting antenna complexes (LHCs), allow microalgae to effectively capture light energy. As a result, high light intensity can overwhelm their photosystems and lead to the formation of reactive oxygen species, a reduction in photosynthetic efficiency, and deleterious cell stress [55]. In order to avoid these consequences of photoinhibition, researchers have used RNA interference technology to downregulate the expression of LHC proteins in Chlamydomonas reinhardtii [ 56••]. The resulting LHC mutant was indeed deficient in mRNA and proteins of the entire LHC gene family and contained less tightly stacked thylakoids. Consequently, the strain exhibited a higher resistance to photodamage and increased light penetration in liquid culture. With these improvements, this newly engineered strain of algae offers more efficient conversion of solar energy to biomass.
Engineered light-harvesting antennae
Physiological and biochemical adaptations for conditions of low light, including tightly stacked thylakoids and large light-harvesting antenna complexes (LHCs), allow microalgae to effectively capture light energy. As a result, high light intensity can overwhelm their photosystems and lead to the formation of reactive oxygen species, a reduction in photosynthetic efficiency, and deleterious cell stress [55]. In order to avoid these consequences of photoinhibition, researchers have used RNA interference technology to downregulate the expression of LHC proteins in Chlamydomonas reinhardtii [ 56••]. The resulting LHC mutant was indeed deficient in mRNA and proteins of the entire LHC gene family and contained less tightly stacked thylakoids. Consequently, the strain exhibited a higher resistance to photodamage and increased light penetration in liquid culture. With these improvements, this newly engineered strain of algae offers more efficient conversion of solar energy to biomass.
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