Plants grown in greenhouse at 25°C when exposed first to 35°C for 6 hours and subsequently to 42°C for 12 hours adapt better to the high temperature (42°C) in comparison to those directly transferred to 42°C for the same duration. What is the phenomenon called and what is its main physiological basis?
1
Acquired thermo-tolerance because of the induction of mutagens resulting into improved stability of all the proteins
2
Induced thermo-tolerance because of the induction of heat shock proteins
3
Induced thermo-tolerance because changes in RNA polymerase II resulting in efficient and improved transcription.
4
Acquired thermo-tolerance because of efficient post translational modification of proteins.