Question

why do coriander leaves turn purple color when Betadine solution is added

Answer 1

Answer:

Cilantro often goes purple when it is ready to set seed and die. If it is being grown in a small container with crowded roots, the plant will be stressed, it will think it's going to die, so it will go purple and bolt (that is go to seed) prematurely in order to leave some progeny and continue its race

Explanation:

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