九龙江口秋茄和白骨壤的渗透调节剂及其贡献

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NO3-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。

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

The osmotica and their contributions to the osmotic adjustment in the Kandelia candel(L.) Drue and Avicennia marina (Forsk) Vierh growing in the Fuian Jiulongiiang fover Estuarywere studied. The resuits show that the contribution of inorgatiic osmotica to the total osmoticadustment was greater than organic osmotica, the contribution of inorganic osmotica being 87.8%and 87.4% respechvely, in K candel and A marina and the organic osmohca being only l2.2% andl2.6%, respectively. Among the inorganic osmotica the contribution of Na and C1 - was dominant,then K , whilst the contributions of Ca= , Mg= and NO, were all much smaller. Among theorganic osmotica, the soluble sugars made the most contribuhon, accounhng fOr lo.9% and l l.2% ofthe total osmotic adjustment respectively in K candel and A marina, but the free amino acids andorganic acids made much less contribution. In addition, the calculated osmotic adjustlnent abilities inthe two mang1'ove species, according to the analyzed concentrahons of inorgahic and organic osmotica,were less than the actually measured ones, indicating that there were some other unknown osmoticawhich made contribute to the total osmotic adjustment to some extent.