Cold damage on nodosa hybrid

[greenhouseFrog]

Welp…It’s been pretty cold and rainy(between 55F and 41F)for the past several days, so I prolonged the inevitable and didn’t check on plants growing on trees until today—surprisingly, almost everyone is doing alright with the exception of this nodosa hybrid.

Is this discoloration a result of the cold and wet conditions it endured?

Thanks in advance!