PLANT Cell Death. “In plants, cell death is part of the normal cycle of the organism. Developmental cell death is observed in many plant tissues, being crucial for instance for senescence of leaves and flowers, formation of pollen and seeds and terminal differentiation of vascular elements. Moreover, plant cells undergo Programmed Cell Death in response to infection.”
https://celldeath.files.wordpress.com/2010/11/lopezself_munoz.pdf