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Name: Jack
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Question:
Do plants have any other way of growing besides photosythesis? Plants do not use photosynthesis to grow!!! They use cellular respiration just like every other organism to process energy into work. Plants use oxygen just like we do. Photosynthesis is principally only a process to change sunlight into a chemical form for storage.



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Steve Sample


Jack,

Several kinds of flowering plants survive without the use of chlorophyll which is what makes plants green and able to produce sugar through photosynthesis. Dodder is a parasitic nongreen (without chlorophyll) plant that is commonly found growing on jewelweed and other plants in damp areas. Dodder twines around its host, (A host is an organism that has fallen victim to a parasite.), like a morning glory and attaches itself at certain points along the stem where it absorbs sugar and nutrients from the hosts sap.

Another flowering plant, known as Indian pipe, is saprophytic. It does not have chlorphyll either. A saprophyte is an organism that absorbs dead organic material from its environment. The Indian pipe gets its food from decaying leaves, wood, and other dead materials found in a damp woodland. Another woodland plant, similar to Indian pipe, is squaw root.

People don't think of them as plants, but mushrooms are saprophytic plants as well. Several thousand species exist in damp environments throughout the world!

Wayne Vanderploeg


All green plants produce food for growth by photosynthesis. There are a few flowering plants like broom rape and Indian pipes that are saprophytic, that is grow somewhat like fungi on other organic material, and a few like some mistletoes, that are parasitic, growing on other living plants, usually trees. You may still find some books that consider fungi to be plants, but most biologists now consider them a separate kingdom.

J. Elliott


Jack,

There are different types of photosynthesis (C3, C4, and CAM metabolic pathways). They all involve respiration at some point each day/night. However, only photosynthesis can fix carbon (use CO2 and H2O and with sunlight (energy) produce O2 and C6H12O6 that it needs to grow).

http://www.hsu.edu/faculty/murrayf/courses/bio1013/chap07/jpgver/

Sincerely,

Anthony R. Brach



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