| 摘要: |
| 于1994年和1995年，在福建省九龙江口龙海市海岸采集秋茄和白骨壤样品，采用原子吸收分光光度法、而定法和比色法分析了其叶片组织中无机和有机渗透调节剂的含量及其贡献。结果表明，秋茄和白骨壤的无机渗透调节剂在总渗透调节中的贡献分别为87.8％和87.4％，有机渗透调节剂的贡献仅分别为12.2％和12.6％。在无机渗透调节剂中，Na+和Cl-占主导地位，其次为K+，而Ca2+、Mg2+和NO-3-的贡献很小。在有机渗透调节剂中，可溶性糖占主导地位，游离氨基酸和有机酸的贡献较小。另外，秋茄和白骨壤根据分析的无机和有机渗透调节剂浓度计算出的渗透调节能力均小于实测值，说明存在其它一些未知的渗透调节剂。 |
| 关键词: 秋茄 白骨壤 渗透调节剂 渗透调节能力 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目，39670083号 |
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| THE OSMOTICA AND THEIR CONTRIBUTIONS TO THE OSMOTIC ANJUSTMENT FOR KANDELIA CANDEL (L.) DRUCE AND AVICENNIA MARINA (FORSK) VIERH GROWING IN THE JIULONGJIANG RIVER ESTUARY |
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ZHAO Ke-fu, FENG Li-tian, LU Yuan-fang, FAN Hai
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Institute of Plant Stress,Shandong Normal University,Jinan,250014
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| Abstract: |
| The osmotic and their contributions to the osmotic adjustment in the Kandelia candel (L.) Druce and Avicennia marina (Forsk) Vierh growing in the Fujian Jiulongjiang River Estuary were studied. The results show that the contribution of inorganic osmotic to the total osmotic adjustment was greater than organic osmotica, the contribution of inorganic osmotica being 87.8% and 87.4% respectively, in K. candel and A. marina and the organic osmotica being only 12.2% and 12.6%, respectively. Among the inorganic osmotica, the contribution of Na+ and Cl- was dominant, then K+, whilst the contributions of Ca2+, Mg2+ and NO3- were all much smaller. Among the organic osmotica, the soluble sugars made the most contribution, accounting for 10.9% and 11.2% of the total osmotic adjustment respectively in K. candel and A. marina, but the free amino acids and organic acids made much less contribution. In addition, the calculated osmotic adjustment abilities in the two mangrove species, according to the analyzed concentrations of inorganic and organic osmotica, were less than the actually measured ones, indicating that there were some other unknown osmotica which made contribute to the total osmotic adjustment to some extent. |
| Key words: Kandelia candel (L.) Druce, Avicennia marina (Forsk) Vierh, Osmotica, Osmotic adjustment ability |
