Tolerance of Taraxacum officinale to Waterlogging
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摘要: 以荆州和襄阳习家池两地的药用蒲公英为试验材料, 对其进行全水淹处理, 分析药用蒲公英各种生理指标和形态指标的变化, 结果表明:(1)荆州产药用蒲公英MDA含量、游离脯氨酸含量以及CAT活性测定结果较习家池产药用蒲公英均有显著提高, 而叶绿素含量都低于习家池产药用蒲公英, 表明习家池产药用蒲公英抗涝性更强。(2)通过对正常生长的和水淹30 d的药用蒲公英外部形态指标测定发现, 水淹30 d的药用蒲公英各项指标均高于正常生长的药用蒲公英, 部分指标达到显著性差异。结果表明药用蒲公英具有极强的耐涝性, 适合在江汉平原以及耐涝区域种植。Abstract: Taraxacum officinale is widely distributed in China.It is highly valued as a medicinal and food material with broad application prospects.However, its waterlogging tolerance has not been reported.Using the dandelions collected in Jingzhou city and at XiJiaChi Garden, Xiangyang city for the experiment, changes in the physiological and morphological indicators of the plants under artificial flooding condition were studied.The results showed that (1) the MDA and free proline contents and CAT activity were significantly higher in Jingzhou than XiJiaChi dandelions, while the chlorophyll content lower than Xijiachi, which suggested that the variety from XiJiaChi were more resistant to waterlogging than that from Jingzhou; and, (2) under 30 ds of waterlogging, the dandelions showed higher scores on the external morphological indices, some with significant differences, as compared to those grown under normal conditions.It appeared that Xijiachi dandelions was highly tolerant to waterlogging and could be adequately planted in Jianghan Plain and other regions with similar geological and environmental conditions.
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图 1 两地药用蒲公英的MDA含量的变化
Figure 1. Changes on MDA content in T.officinale from two localities
图 2 JZ和CJC叶绿素的含量变化
Figure 2. Changes on chlorophyll a and chlorophyll b contents in T.officinale from two localities
图 3 JZ和CJC蒲公英的叶绿素a/b比率
Figure 3. Chlorophyll a/chlorophyll b ratios in T.officinale from two localities
表 1 过氧化氢酶活性变化
Table 1. Changes on catalase activity
[单位/(U· g-1·min-1)] 处理 水淹5 d 水淹10 d 水淹15 d 水淹20 d 水淹25 d 水淹30 d JZ 41.56±4.74a 56.24±5.38a 18.71±2.58b 24.19±3.77a 45.69±4.72a 48.69±5.22b CJC 18.19±2.37b 15.09±2.16b 32.67±4.32a 15.55±1.87b 11.88±1.52b 54.48±5.65a 
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表 2 JZ和CJC蒲公英的外部形态指标的测定结果
Table 2. Evaluation on external morphological indices of T.officinale from two localities
处理 叶面积/cm2 植株体积/mL 叶片数/片 根系部鲜重/g 地上鲜重/g 根冠鲜重比 根系生物量/g 地上生物量/g 根冠生物量比 JZ(CK) 67.3±0.252ab 18.67±0.021a 6.67±0.577a 3.5±0.1a 12.17±0.115a 0.29±0.006a 3.3±0.1c 1.47±0.058b 0.44±0.006bc JZ(30 d) 74.00±0.4a 20.00±0.5a 6.33±0.577ab 3.7±0.021a 13.57±0.153a 0.27±0.00a 4.5±0.058a 2.23±0.115a 0.49±0.021b CJC(CK) 67.2±0.058b 18.67±0.577a 5.33±0.577b 3.61±0.101a 12.57±0.306a 0.29±0.012a 3.0±0.1d 1.2±0.1c 0.40±0.042c CJC(30 d) 72.9±0.173a 19.5±0.02a 6.33±0.577ab 3.7±0.1a 13.23±0.058a 0.27±0.01a 4.03±0.153b 2.23±0.058a 0.58±0.035a
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