1. Ion Flux in Roots of Chinese Fir (Cunninghamia lanceolata (Lamb.) Hook) under Aluminum Stress.
- Author
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Ma, Zhihui, Huang, Binlong, Xu, Shanshan, Chen, Yu, Cao, Guangqiu, Ding, Guochang, and Lin, Sizu
- Subjects
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CHINA fir , *EFFECT of aluminum on plants , *PHYSIOLOGICAL stress , *PLANT roots , *PLANT growth , *SOIL fertility - Abstract
Chinese fir is a tall, fast-growing species that is unique to southern China. In Chinese fir plantations, successive plantings have led to a decline in soil fertility, and aluminum toxicity is thought to be one of the main reasons for this decline. In this study, Non-invasive Micro-test Technology was used to study the effect of aluminum stress on the absorption of 4 different ions in the roots of the Chinese fir clone FS01. The results are as follows: with increased aluminum concentration and longer periods of aluminum stress, the H+ ion flow gradually changed from influx into efflux; there was a large variation in the K+ efflux, which gradually decreased with increasing duration of aluminum stress; and 1 h of aluminum stress uniformly resulted in Ca2+ influx, but it changed from influx to efflux after a longer period of aluminum stress. Changes in the different concentrations of aluminum had the largest influence on Mg2+. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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