How do angiosperms excrete their waste?

Question

If you have any sources also, that would be great. Thank you:)

Answer 1

well they do release waste products as all plants do, but excretion is a word that is used to describe urination, the process of releasing nitrogenous waste, which plants do not do.

the waste they release is CO2 as well as O2, since in plants respiration and photosynthesis both take place.

If you need a source, look up photosynthesis.

Answer 2

Since plants don't take in food the same way that animals do they do not form indigestible material that has to be excreted.  I would suggest that the biggest waste product of angiosperm growth would be oxygen.  This is produced during photosynthesis in such large quantities that most of it is released to the atmosphere to the benefit of us nonphotosynthetic organisms.  Plant use a little oxygen for respiratory processes just like we do but most of what they produce is a waste product.

Answer 3

Plants do eliminate some wastes but instead of eliminating to the exterior like animals do they secrete their solid metabolic wastes into their nonliving tissues or cavities within the plant. Plant cells have internal sacs called vacuoles that are used for storage including waste storage. So with plants is called secretion rather than excretion for their nongaseous byproducts. The primary plant waste is oxygen and it is released as a gas through leaf stomata and stem lenticels. Beyond this they also secrete from 10 to 25% of their total carbohydrate product via their roots into the soil to attract symbiotic soil organisms. This is their root carbohydrate exudate.

http://www.plantphysiol.org/cgi/content/...

http://books.google.com/books?id=kSWV3HJ...

Trees use the heartwood. As a tree matures the sapwood ages and becomes the heartwood with the addition of tannins and metabolic waste materials from the tree.

http://www.sciencemag.org/cgi/content/ci...

http://books.google.com/books?id=DuVxdu6...

"The heartwood contains waste products produced during the metabolism of the tree." from ch 10.

http://books.google.com/books?id=Rm_QUXM...

Some botanists also propose that leaves may also be repositories of annual wastes by trees. Plants have found ways of using these toxins to ward off herbivorous pests by depositing secondary metabolites in leaves to make them unpalatable or harmful. They may also secrete them in the soil to prevent other plants from growing nearby.

Allelopathy & secondary metabolites.

http://www.biologie.uni-hamburg.de/b-onl...

http://books.google.com/books?id=eFQgSjZ...