Dr. Shakir Ullah is a postdoctoral fellow at the Key Laboratory of Forest Plant Ecology, Ministry of Education, Department of Botany, Northeast Forestry University, Harbin, China. He completed his PhD at Northeast Forestry University and master's studies in botany at Islamia College Peshawar, Pakistan. His current project is on abiotic stress, including heavy metals (HMs), micro/nanoplastics (MNPs), and the responses of plants based on physiological, biochemical, and molecular approaches. His research interests include stress physiology and metabolism.