Search on: PHOTOTROPHIC PROCESSES 
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Descriptor English:   Phototrophic Processes 
Descriptor Spanish:   Procesos Fototróficos 
Descriptor Portuguese:   Processos Fototróficos 
Synonyms English:   Growth, Phototrophic
Phototrophic Growth
Phototrophic Process
Phototrophy
Process, Phototrophic
Processes, Phototrophic  
Tree Number:   G02.111.669
G03.800
Definition English:   Processes by which phototrophic organisms use sunlight as their primary energy source. Contrasts with chemotrophic processes which do not depend on light and function in deriving energy from exogenous chemical sources. Photoautotrophy (or photolithotrophy) is the ability to use sunlight as energy to fix inorganic nutrients to be used for other organic requirements. Photoautotrophs include all GREEN PLANTS; GREEN ALGAE; CYANOBACTERIA; and green and PURPLE SULFUR BACTERIA. Photoheterotrophs or photoorganotrophs require a supply of organic nutrients for their organic requirements but use sunlight as their primary energy source; examples include certain PURPLE NONSULFUR BACTERIA. Depending on environmental conditions some organisms can switch between different nutritional modes (AUTOTROPHY; HETEROTROPHY; chemotrophy; or phototrophy) to utilize different sources to meet their nutrients and energy requirements. 
Indexing Annotation English:   distinguish from PHOTOTROPISM
See Related English:   Autotrophic Processes
Chemoautotrophic Growth
Heterotrophic Processes
Nutritional Physiological Phenomena
 
History Note English:   2007 
Allowable Qualifiers English:  
DE drug effects GE genetics
IM immunology PH physiology
RE radiation effects  
Record Number:   52486 
Unique Identifier:   D052817 

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