Understanding Tropism
Thank you for your comment below in answer to my previous observation and question.
The fifth paragraph to the second subheading, Sky and earth, advises us that "But tropism can be negative to light, for there is also geotropism, sometime known as gravitotropism, which is characteristic of roots. Roots grow downwards because at the root tip they have an elongation zone. Within the roots we find organelles called amyloplasts, which contain starch, which weighs them downwards towards the earth. Within these organelles are gravity sensitive cells called statocytes, which ensure downward growth."
Are different plants attune to different biogeographical and temporal definitions of their gravitotropism?
For example, do some find their gravitotropism less or more injured by extensive or minimal or moderate root-pruning than others?
DerdriuMarriner, Aug 14, 2024