| The effect of Ca2+ on Radix isatidis seed germination and seedling physiological characteristics under Cd2+ stress |
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| DOI：10.7606/j.issn.1000-7601.2014.01.026 |
| Key Words: Radix isatidis Cd2+ Ca2+ seed germination antioxidant enzymes |
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| Abstract: |
This study aims to investigate the effect of different Ca2+ levels (0, 80, 160 mg·L-1 and 320 mg·L-1) on seed germination, activities of SOD, POD, and CAT, and protein content of Radix Isatisdis seedlings under different Cd2+ stress le
vels (10 mg·L-1 and 30 mg·L-1). The results show that low concentration of Ca2+, especially the concentration of 160 mg·L-1, may mitigate the deleterious effect of Cd2+ by increasing germination rate and vigour index, and enhancing activities of SOD, POD, and CAT, and increasing protein content. The influence of Ca2+ on the Cd2+ toxicity was not obvious at high Cd2+ concentration because of the inhibition of the above indexes. These results suggest that the low concentration of Ca2+ could be favorable for coping with Cd2+ toxicity, whereas high concentration of Ca2+ shows synergistic effect with Cd2+ for Radix Isatisdis. |
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