Germination, growth and physiological responses of mangrove plant (Bruguiera gymnorrhiza) to lubricating oil pollution
Germination, growth and physiological responses of mangrove plant (Bruguiera gymnorrhiza) to lubricating oil pollution
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DOI：
10.1016/j.envexpbot.2006.09.002
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发表时间：
2007-05
影响因子：
5.7
通讯作者：
Chunguang Zhang;K. K. Leung-K.;Y. Wong;N. Tam
中科院分区：
文献类型：
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作者：
Chunguang Zhang;K. K. Leung-K.;Y. Wong;N. Tam
研究了润滑油对木榄种子萌发、早期生长及生理反应的影响，对香港常见的一种红树林植物进行了调查。新鲜和废（或使用过的）润滑油在5Lm− 2的单一初始剂量下对发芽（即初始建立）没有任何影响。所有油处理的繁殖体在30天内都成功地发育成新的幼苗，与对照（不添加任何油）相同。该种胎生繁殖体细长，平均长15 cm，外露部分只有1/3被油覆盖。而桐花树Aegiceras corniculatum（L.）布兰科（Acanthus ilicifolius L.）在桑迪和泥质红树林沉积物中，相同剂量的新鲜和废润滑油完全抑制，可能是因为它们的繁殖体相对较小，完全被油覆盖。虽然B.结果表明，油处理对木榄幼苗的早期生长（包括株高、叶片数和生物量）有显著的抑制作用，而自由基、丙二醛（MDA）含量和抗氧化酶超氧化物歧化酶（SOD）活性则随油处理的进行而增加。这些结果表明，润滑油，特别是废油，造成氧化胁迫，并造成脂膜损伤，导致生长下降的B幼苗。这种影响在生长在桑迪的植物中比在泥泞的红树林沉积物中更为显著。
The effect of lubricating oil on germination, early growth and physiological responses of Bruguiera gymnorrhiza (L.), a common mangrove plant species in Hong Kong was investigated. Both fresh and spent (or used) lubricating oil at a single initial dose of 5Lm−2did not have any effect on germination (i.e. initial establishment). All the oil-treated propagules were successfully developed into new seedlings within 30 days, same as the control (without any oil addition). This viviparous species had long slender propagules with an average size of 15cm long, and only 1/3 of the exposed section of the propagule was covered by oil. On the contrary, germination of Aegiceras corniculatum (L.) Blanco and Acanthus ilicifolius L. in sandy as well as muddy mangrove sediments was totally inhibited by fresh and spent lubricating oil at the same dose, probably because their propagules were relatively small in size and were completely covered by oil. Although germination of B. gymnorrhiza was not affected, early growth including height, leaf number and biomass of the oil-treated seedlings was significantly reduced while the content of free radicals and malondialdehyde (MDA), and the activity of superoxide dismutase (an anti-oxidant enzyme) increased with oil treatment. These results indicate that lubricating oil, in particular spent oil, posed oxidation stress and caused lipid membrane damages leading to growth reduction in young seedlings of B. gymnorrhiza, and this impact was more significant in plants grown in sandy than in muddy mangrove sediments.