Question

Kautsky effect is

• A. Photoluminescence in the absence of photosynthesis
• B. Outburst of fluorescence at the end of illumination
• C. Outburst of fluorescence during first few moments of illumination
• D. Bioluminescence at night

Answer 1

The correct option is C Outburst of fluorescence during first few moments of illumination

Kautsky effect is a phenomenon in which there is outburst of a plant fluorescence when exposed to light. It is also called as fluorescence transient. When photosynthesizing cells which are adapted to darkness are exposed to few moments of illumination, there is variation in chlorophyll fluorescence accompanied with the induction of photosynthetic activity.

So, the correct answer is 'Outburst of fluorescence during first few moments of illumination'