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wt07060210新蟲 (小有名氣)
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[求助]
重金屬銅對芹菜幼苗生長的影響
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本實驗的目的在于研究重金屬銅對芹菜的生理毒性及硅的緩解作用。 采用不同濃度硫酸銅（20,40,60,80,100 mg/L）處理芹菜幼苗，測定了幼苗植株生長狀況、光合作用指標(biāo)和抗氧化活性；并采用20,40,60,80,100 mg/L 硅酸鈉處理經(jīng)硫酸銅危害的幼苗，測定硅對重金屬銅的緩解作用。 隨著銅處理濃度的升高，芹菜幼苗的生長抑制增強(qiáng)，生物學(xué)產(chǎn)量下降。葉綠素a和葉綠素b含量與對照相比顯著降低。60 mg/L 硫酸銅處理幼苗的過氧化物酶和超氧化物歧化酶活性最高。40 mg/L 的硅酸鈉對硫酸銅的解毒作用最為明顯。 高濃度的硫酸銅抑制芹菜的幼苗生長，降低光合作用能力。硫酸銅處理后植株幼苗可以產(chǎn)生一定的生理應(yīng)答，適當(dāng)濃度的硅處理可以緩解重金屬銅的危害。 [ Last edited by wt07060210 on 2013-5-8 at 15:04 ] |
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nwsuafliu
木蟲 (著名寫手)
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4樓2013-05-08 16:23:24
nwsuafliu
木蟲 (著名寫手)
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【答案】應(yīng)助回帖
| The study aimed to investigate the physiological toxicity effect of heavy metal copper on celery seedlings and its alleviation by silicon treatment. Celery seedlings were treated with CuSO4 at various concentrations (20, 40, 60, 80, 100 mg/L) and measured for their growth, photosynthetic parameters and antioxidant activities. Na2SiO3 solutions in the same concentration range (20, 40, 60, 80, 100 mg/L) were applied on the CuSO4-treated seedlings to verify the alleviation effects of silicon. As a result, the growth retardation of celery seedlings was enhanced and biological yield was reduced with the increase of copper concentration. The content of chlorophyll a and b were significantly lower than that of control. The highest enzymatic activity of SOD and POD was found in seedlings treated with 60 mg/L CuSO4. Meanwhile, the best detoxification effect was exerted by 40 mg/L Na2SiO3. In conclusion, high concentration of CuSO4 inhibited the growth of celery seedlings and compromised their photosynthetic machinery. Celery seedlings showed some physiological response to CuSO4 treatment and silicon treatment at proper concentration might alleviate the harmful effect of copper. |
2樓2013-05-08 15:57:17
wt07060210
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3樓2013-05-08 16:19:02
wt07060210
新蟲 (小有名氣)
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5樓2013-05-08 16:25:46
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