•  
  •  
 

Publication Date

1981

Keywords

Plants--Nutrition--Research; Plants--Experiments

Abstract

Ad libitum feeding plant systems fitted with two reservoirs were used to monitor daily aqueous uptake by plants from paired reservoirs. When the reservoirs contained aqueous solutions of the same chemical composition, a plant accepted nourishment from alternate sources without bias; but when the reservoirs contained different aqueous solutions, i.e. either tap water or standard nutrient solution, a sharp bias was exhibited, depending on the plant's need for mineral nutrient, which changed with time. Eventually a "stable-end-state" was attained, favoring water over the standard nutrient solution in the ratio of 3 to 1. When the plant was pruned severely, however, preference oscillated sharply from one source to the other for six months while new growth developed to reestablish the "stable-end-state". If a toxic pollutant was added to the favored reservoir, the plants preference switched sharply to the other source until the toxicant was eliminated from. the polluted reservoir, thus ensuring the plants survival.

First Page

18

Last Page

21

Included in

Plant Biology Commons

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.