Environmental Engineering Reference
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Although the ion flux was also quickened in ZH13 under 0-200 mM treatment, the flux
declined sharply in 300 mM NaCl, almost reaching 0. Besides, the flux of Cl - was also
different. Under 300 mM NaCl, the efflux of Cl - was enhanced by 136.9% in BB52, yet in
ZH13 the efflux was reduced by 64.1% on the contrary (Figure 4C). The behavior of the ion
fluxes in mature seedlings has the similar characteristic (Figure 4D). The wild soybean also
represented stronger efflux of Na + and Cl - , influx of H + and weaker K + drain. Yet compared to
young seedlings the difference was smaller.
Figure 4(A). Schematic diagram of Non-invasive Micro-test Technique (NMT).
4. D ISCUSSION
4.1. The Water Potential and RWC Were Reduced Obviously in Both Types
of Soybean and the Cultivated One Showed More Sensitive
The osmotic stress is the first effect produced by salt stress. Generally, it starts
immediately when the salt concentration exceeds the threshold level (Munns and Tester,
2008).
Vast amount of researches on different species such as R. mucronata, Urochondra
setulosa, tomato and S. salsa have reported that the Water potential and osmotic potential of
plants decreased with an increase in salinity.
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