| Effects of IAA with different concentrations on glucosinolate contents in pakchoi |
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| DOI：10.16302/j.cnki.1000-7601.2015.01.006 |
| Key Words: glucosinolate pakchoi growth IAA |
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| Abstract: |
| The effects of IAA with different concentrations (0，2 mg·L-1，5 mg·L-1，10 mg·L-1，20 mg·L-1) on the growth and the glucosinolate contents were studied in pakchoi shoots. The results showed that more biomass of pakchoi could be achieved with the spray of exogenous IAA at higher concentration. Compared with control, the contents of aliphatic glucosinolate, indole glucosinolate, and the total glucosinolates were induced significantly by 5～20 mg·L-1 IAA, and those of aromatic glucosinolate/gluconasturtiin could be significantly increased with any IAA treatment. For individual glucosinolate, gluclyssin and gluconapin contents were significantly increased by 5～20 mg·L-1 IAA. Nevertheless, the contents of glucobrassicanapin, glucobrassicin and 4-methoxy-glucobrassicin became increased first and then decreased. Particularly, glucobrassicanapin content was significantly higher than the control even with 2 mg·L-1 IAA treatment. In addition, the contents of neoglucobrassicin and relative percentage of aliphatic glucosinolate tended to increase with the increase of exogenous IAA concentrations, whereas the relative percentage of indole glucosinolate showed a decreasing trend. Moreover, aromatic glucosinolate tended to become increased first and then decreased. It could be concluded that all seven kinds of glucosinolates in pakchoi exhibited different responses to different IAA treatments. |
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