红树胎生胚轴发育和叶片发育的C1量动态

Dynamic of Cl Content in Development of Viviparous Hypocotyl and Leaf of Mangrove

探讨了红树胎生胚轴和叶片在发育过程中的Cl量动态与抗盐适应的相关性,结果表明:胎生胚轴的含Cl量远低于母树叶片的含Cl量,胚轴在母树上萌生至成熟;木榄和海莲的组织干重含Cl量和组织液Cl浓度降低;秋茄干重含Cl量降低,组织液Cl浓度初期降低而后期提高,拒盐植物叶片在生长、成熟至衰老,累积Cl量提高,抛弃富盐叶片为本类群植物适应高盐生境的特性之一,红树植物的抗盐性在生长发育中获得。

The paper deals with the interrelationship between the dynamic of Cl content in development of viviparous hypocotyl and leaf of mangrove and salt resistant adaptation. The results showed that:The Cl content in viviparous bypocotyles of Kandelia candel,Bruguiera gymnorrhiza and B. sexangula was much lower than fully developed leaves of mature plants. As the hypocotyl develop on the parent phant,the Cl content of dry tissue delined for the three species and so did the Cl concentration of tissue liquid for B, gymnorrhiza and B. sexangula ,but for K. cundel the Cl concentration delined during the initial stages and rised during the later stages. For salt-exclusion plant,the Cl content rised with developing leaf. Discarding of salt-laden old leaves was one of characters for salt-exclusion plant to adapt salt habitat.