As an Amazon Associate I earn from qualifying purchases.

Phytochromes Definition and Explanation PDF | Download eBooks

Learn Phytochromes definition in biology with explanation to study “What are Phytochromes”. Study phytochromes explanation with biology terms to review biology course for online degree programs.

Phytochromes Definition:

  • Phytochromes are photoreceptors that absorb mostly red light.

    Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson

Phytochromes Explanation:

Phytochromes are a class of photoreceptor in plants, bacteria and fungi use to detect light. They are sensitive to light in the red and far-red region of the visible spectrum and can be classed as either Type I, which are activated by far-red light, or Type II that are activated by red light. Recently it has also been shown that the phytochromes can also act as temperature sensors, as warmer temperatures enhance their de-activation. All of these factors contribute to the plants ability to germinate. Phytochromes control many aspects of plant development including germination of seeds, the synthesis of chlorophyll, the elongation of seedlings, the size, shape and number of leaves and the timing of flowering in adult plants. Phytochromes are widely expressed across many tissues in plants and in many developmental stages.

Keep Learning Biology Explanations

What are Proto oncogenes?

Proto-oncogene is actually a normal gene which, when altered by mutation, becomes an oncogene that can contribute to cancer. Proto-oncogenes ...

What are Protein domains?

A protein domain is a conserved part of a given protein sequence and (tertiary) structure that can evolve, function, and ...

What is Nitrogen cycle?

The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among ...

What is Replication fork?

Replication fork is a characteristic feature of replication of DNA. The replication fork is actually the very active area where ...

What is Reducing agent?

The agent is itself being oxidized is called the reducing agent. A reducing agent is typically in one of its ...

What is Aqueous Solution?

Any solution that has the water as a solvent is called an aqueous solution. As water is an excellent solvent ...