GENETIC MODULATION OF PHOTOSYNTHETIC ORGANISMS FOR IMPROVED GROWTH

Mutant photosynthetic organisms having reduced chlorophyll and increased photosynthetic efficiency are provided. The mutant strains have mutated or attenuated: chloroplastic SRP54 gene and SGIl gene;chloroplastic SRP54 gene and SGI2 gene; chloroplastic SRP54 gene, SGIl, and SGI2 genes are disclosed. The mutant photosynthetic organisms exhibit increased productivity with respect to wild-type strains. Also provided are mutant photosynthetic organisms having mutated or attenuated cytosolic SRP54 genes. Provided herein are methods of producing biomass and other products such as lipids using strains having mutations in an SRP54 gene, SGIl, SGI2 genes, a combination of SGI1/SRP54, and a combination of SGI2 and SRP54 genes. Also included are constructs and methods for attenuating or disrupting SRP54, SGIl, and SGI2 genes. 提供了具有减少的叶绿素和增加的光合效率的突变体光合生物。所述突变体菌株具有突变或弱化的：叶绿体SRP54基因和SGI1基因；叶绿体SRP54基因和SGI2基因；公开了叶绿体SRP54基因、SGI1基因和SGI2基因。相对于野生型菌株，所述突变体光合生物展现出增加的生产力。还提供了具有突变或弱化的胞质SRP54基因的突变体光合生物。本文提供了使用在SRP54基因、SGI1基因、SGI2基因、S