Q81
Russet sprouting in lettuce is caused due to
A.
Ethylene exposure
AnswerB.
Heat stress
C.
Moisture imbalance
D.
Nitrogen deficiency
Answer: Option A
Solution
Answer: Option A
Solution:
Russet sprouting in lettuce is caused due to Ethylene exposure.The russet spot is caused by ethylene production and can occur in mature to over-mature lettuce, especially following anaerobic conditions in the field.
Russet spotting is a physiological disorder induced in iceberg lettuce by exposure to parts per million levels of ethylene at +/-2 degrees C.
Ethylene-induced phenylalanine ammonia-lyase and ionically bound peroxidase activities correlated with the development of Russet sprouting symptoms.