A gerontoplast is a plastid found in formerly green tissues that are currently senescing. A gerontoplast is a chloroplast that has re-purposed through a process of developmental senescence.[1]

Transformation of chloroplasts to gerontoplasts

The term gerontoplast was first introduced by Sitte (1977) to define the unique features of the plastid formed during leaf senescence. The process of senescence brings about regulated dismantling of cellular organelles. Chloroplast shows the first sign of senescence induced degradation and is the last organelle to survive when other organelles are completely disorganized. The formation of gerontoplast from chloroplast during senescence involves extensive structural modifications of thylakoid membrane with the concomitant formation of a large number of plastoglobuli with lipophilic materials. The envelope of the plastid, however, remains intact.


  1. "gerontoplast - CTD". Retrieved 26 December 2015.

This article is issued from Wikipedia - version of the 8/4/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.