Effect of storage conditions on phytochemical characteristics and activities of black tea cultivated from geographically different landscapes - Syed Ali Raza Naqvi; Sumaira Naz; Muhammad Irfan; Ameer Fawad Zahoor; Atif Hussain Randhawa; João Miguel Rocha; Mohamed Fawzy Ramadan (South African Journal of Botany, 2026)