| 刘强,龙婉婉,刘先贵,涂汉.铝浸种对小白菜种子萌发和幼苗生理特性的影响[J].井冈山大学自然版,2011,(3):56-59 |
| 铝浸种对小白菜种子萌发和幼苗生理特性的影响 |
| EFFECT OF SEED SOAKING WITH ALUMINUM ON SEED GERMINATION AND SEEDLING PHYSIOLOGY OF PAKCHOI |
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| DOI： |
| 中文关键词: 铝 小白菜 种子萌发 幼苗生理 |
| 英文关键词: Aluminum pakchoi seed germination seedling physiology |
| 基金项目:国家自然科学基金项目(30760108); 江西省自然科学基金项目(2010GQN0122) |
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| 摘要点击次数: 2225 |
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| 中文摘要: |
| 以2个小白菜品种南京长梗和抗热605为试验材料,研究了不同浓度铝浸种后种子萌发和幼苗生理特性的变化。结果表明,10～5000μmol/L的铝浸种处理对2个小白菜品种的发芽率无明显影响。5000μmol/L的铝处理显著降低了小白菜的发芽势、发芽指数和活力指数。种子萌发后,南京长梗和抗热605分别在100和1000μmol/L的铝处理时根长、根重和茎重显著降低。10～100μmol/L铝处理对小白菜叶片丙二醛(MDA)含量和过氧化物酶(POD)活性影响较小,但中高浓度铝处理(1000～5000μmol/L)显著增加了MDA含量和POD活性。可溶性糖(SS)含量随铝浓度的增加呈现出先降低后增加的趋势。这些结果表明,小白菜种子萌发期较幼苗期有更强的耐铝性,不同小白菜基因型品种对铝的反应存在一定的差异性。中高浓度铝处理(1000～5000μmol/L)对小白菜的伤害与细胞内活性氧自由基大量积累有关,而POD活性和可溶性糖含量升高则有助于缓解铝毒害。 |
| 英文摘要: |
| Two pakchoi （Brassica chinensis L.） cultivars＇ （NJCG and KR605） seeds were soaked in the alumnium （Al） solutions with five concentrations （0,10,100,1000,5000 μmol/L） for 12 hours to study the effect of Al on the seed germination and seedling physiology. It was found that 10~5000 μmol/L Al3＋ soaking could not significantly change the germination rate of two cultivars,but 5000 μmol/L Al3＋ could significantly decrease the germination power,germination index and vigor index. After seed germination,root length,fresh weight of root and shoot were significantly decreased at 100 μmol/L Al3＋ in NJCG and 1000 μmol/L Al3＋ in KR605. At the seventh day after germination,10~100 μmol/L Al3＋ had no significant effect on malonaldehyde （MDA） content and peroxidase （POD） activity. However,1000~5000 μmol/L Al3＋ significantly increased MDA content and POD activity in pakchoi leaves of both cultivars compared with the control. Soluble sugar （SS） content was promoted firstly and then reduced with increasing Al concentrations. These results indicated that pakchoi in seed germination period was more tolerant to Al than it in seedling growth period,and different pakchoi cultivars had different reaction to Al. Under middle and high Al concentrations,the toxic effect of Al on pakchoi was due to the great accumulation of reactive oxygen free radical,and the promotion of leaf POD activity and SS content was helpful to alleviate the Al photoxicity. |
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