植物激素对草莓叶片不定芽形成的影响
THE EFFECT OF GROWTH REGULATORS ON ADVENTITIOUS SHOOT FORMATION FROM STRAWBERRY LEAVES
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摘要: 用试管内生长的草莓幼嫩叶片作外植体,培养在MS基本培养基上附加1.5—2.5毫克/升6—BA和0.1毫克/升NAA,可直接诱导成不定芽,诱导率可达20%。如果不定芽继代培养在同样浓度的培养基上,继而可形成大量的丛生芽。能使叶外植体形成不定芽的植物激素组合而不能使其愈伤组织分化成芽。IAA与6—BA的不同浓度组合对不定芽形成效果不明显。Abstract: Young leaves of open pollinated strawberry (Fragaria×ananassa Duch) seedlings developed adventitious shoots when they were cultured in vitro on Murashige and Skoog high mineral salts (MS) supplemented with 6-benzylaminopurine (6-BAP) (1.5 to 2.Stag/liter) and 3-naphthaleneacetic acid (NAA) (0.1 mg/liter). About 20% of all explants formed shoots. Once shoots had formed, they proliferated readily on these media. When callus was transferred to these media, no shoots formed. The substitution of indole-3 acetic acid for NAA gave media that produced no shoots from cither leaves or callus.