濒危红树植物莲叶桐败育植株中7种矿质元素含量

Concentrations of Seven Mineral Elements in Aborted Plant of An Endangered Mangrove Species Hernandia nymphiifolia

在濒危红树植物莲叶桐(Hernandia nymphiifolia)可育植株和败育植株生殖生长期,测定其侧枝的叶、皮、茎、花序轴、总苞、未开雄花、已开雄花、未开雌花和已开雌花9个器官的Na、K、Ca、Mg、Fe、Cu和Zn共7种矿质元素含量。研究结果表明,在相同育性的莲叶桐植株里,不同器官中的7种元素含量多存在显著差异;在不同育性的莲叶桐植株里,大多数相应器官中的7种元素含量也多差异显著,而且败育植株的大部分器官中的7种元素含量比可育植株高;除了Na和Mg外,败育植株的未开雌花中的5种其它元素含量都比可育植株的未开雌花高出许多倍。可见,Na和Mg对莲叶桐发育的影响较小,而高含量的K、Ca、Fe、Cu、Zn可能对莲叶桐雌花的发育有抑制作用。

In order to investigate the mineral elements distribution in plant, seven mineral elements sodium, potassium, calcium, magnesium, iron, copper and zinc were analyzed in the organs of an endangered mangrove species Hernandia nymphiifolia, including its leaf, bark, stem, rachis, involucre, unopened and opened male flowers, unopened and opened female flowers separately in the normal and aborted Hernandia nymphiifolia.The contents of each tested mineral element in different organs of the same sterility plants almost had significant differences. Most of the mineral elements in the corresponding organs also had significant differences in different fertility plants. Most of the same mineral elements in the sterile plants were higher than those in the corresponding organs in fertile plants. Among them, five elements in unopened female flowers of the normal plants are higher than abortion plants except sodium and magnesium. So, sodium and magnesium had no obvious effect on the development of Hernandia nymphiifolia, but the high concentrations of potassium, calcium,iron, copper and zinc might have the important effects on the development of the female flowers.