无机盐用量调整对太行菊不定芽增殖与生长的影响

Effect of Adjustment for Inorganic Salt Contents on Adventitious Buds Proliferation and Growth of Opisthopappus taihangensis in vitro

以太行菊不定芽为材料,通过调整MS培养基中大量元素、微量元素、铁盐、Ca2+、K+的用量与配比,研究MS培养基不同的无机盐用量水平对太行菊不定芽增殖和生长的影响。结果表明,太行菊不定芽的增殖与生长适应较高含量的MS大量元素,降低培养基中的MS大量元素用量,不定芽分化数量减少,增殖系数降低,并且不定芽长势弱,叶片出现黄枯。单独加倍MS培养基中的K+(KNO3与KH2PO4)含量,可促进太行菊不定芽的增殖与生长,不定芽增殖系数明显高于对照及其他处理。增加或降低MS培养基中的Ca2+含量,对太行菊不定芽的增殖与生长影响不大;去掉培养基中的微量元素,不定芽的增殖与生长明显受到抑制,不定芽分化数量减少,且不定芽的叶片枯死严重。减半培养基中的铁盐含量,对不定芽的生长影响较小;但加倍培养基中的铁盐含量,对不定芽的增殖和生长均产生强烈的抑制作用。

The effect of different content of MS medium inorganic salts, including macro-element, micro-element, ferric salts, Ca2＋ and K＋, on Opisthopappus taihangensis adventitious buds proliferation and growth were investigated using adventitious buds of Oplsthopappus taihangensis as test materials. The results showed that the medium containing a relatively higher content of MS macro-element was more suitable for adventitious buds proliferation and growth of Opisthopappus taihangensis. The proliferation and growth of Opisthopappus taihangensis adventitious buds, which were tiny and weak, and many of adventitious buds leaves became yellow or brown, were inhibited on the medium with reduced content of MS macro-element. The adjusted medium with doubled content of KNO3 and KH2PO4 could facilitate the growth and prolif eration of Opisthopappus taihangensis adventitious buds ; it showed the best performance on the proliferation and growth of adventitious buds among all treatments in the study. The adjustment, whether the Ca2~ content increased or decreased in media, had little effect on the proliferation and growth of Opisthopappus taihangensis adventitious buds. The proliferation and growth of Opisthopappus taihangensis adventitious buds was inhibited on the proliferation medium without any micro-element. The proliferation and growth of adventitious buds was strongly inhibited on the proliferation medium containing a twofold content of ferric salts, but slightly affected on the medium with a half content of ferric salts.