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Such a trend was probably related to PC biosynthesis and accumulation according to the progressive increase in Cd root content (Table 1).
Overall, root biomass, root N concentration, and root N content were significantly (p < 0.01) correlated with soil respiration with correlation coefficients of 0.37, −0.28, and 0.29, respectively.
Noticeably, Cd exposure neither decreases root sulfate content nor inhibits root sulfate uptake and sulfate transporter gene expression, but rather significantly enhances sulfate translocation and its metabolism as shown by the significant increases in the GSH levels of the shoot.
Increasing N H 4 + resulted in decreased root hydraulic conductance (Lo) and root water content (RWC), suggesting that water uptake by roots was impaired.
This is the first report of QTL for root lignin and the first report of separate loci determining stem and root lignin content.
Thus, the root Fe content measured comprised the root Fe uptake and the oxidized Fe at the root surface.
Electrolyte leakage of roots, MDA content in coleoptiles and survival percentage were assayed according to above-mentioned methods, respectively.
At the end of heat stress, electrolyte leakage of roots, MDA content in coleoptiles and survival percentage were assayed, respectively, according to our previous methods (Li et al., 2012b).
The wide natural variation found in stem and root lignin content reported here provides the possibility for altered lignin content via conventional breeding programs or by modern molecular breeding techniques.
