Definition

1. Adjective (Biology):

   • Phototrophic: Describing an organism, especially certain bacteria and plants, that obtains energy for growth and metabolism from light, typically through photosynthesis.

2. Noun (Biology):

   • Phototroph: An organism that carries out phototrophy, deriving energy from light.

Usage Examples

• Adjective:

  • Thực vật là những sinh vật quang dưỡng điển hình. (Plants are typical phototrophic organisms.)
  • Vi khuẩn lam có lối sống quang dưỡng. (Cyanobacteria have a phototrophic lifestyle.)

• Noun:

  • Tảo là một quang dưỡng quan trọng trong hệ sinh thái biển. (Algae are an important phototroph in the marine ecosystem.)

Advanced Usage

• The term is primarily used in scientific contexts, particularly in microbiology, botany, and ecology, to classify organisms based on their energy source.
• "Quang dưỡng bắt buộc": Obligate phototroph (an organism that must use light as its energy source).
  • Một số vi khuẩn lưu huỳnh tía là quang dưỡng bắt buộc. (Some purple sulfur bacteria are obligate phototrophs.)

Variants and Related Words

• Dị dưỡng (n/adj): Heterotroph / Heterotrophic (an organism that obtains energy from organic compounds).
• Tự dưỡng (n/adj): Autotroph / Autotrophic (an organism that produces its own food from inorganic substances, which may include phototrophs).
• Quang hợp (n): Photosynthesis (the specific process used by most phototrophs).

Synonyms

• Light-feeding (descriptive synonym).
• Photosynthetic (closely related, though specifically refers to organisms using photosynthesis, a subset of phototrophy).

Related Scientific Terms

• Quang hóa dưỡng (n/adj): Photochemotrophic (a type of phototrophy using light energy but not involving photosynthesis, found in some archaea and bacteria).
• Vô cơ dưỡng (n/adj): Lithotroph / Lithotrophic (an organism that uses inorganic compounds as an energy source, which can be combined with phototrophy, e.g., photolithotrophs).