低硼胁迫对新几内亚凤仙生长和开花的影响

The Effect of Low Boron on the Growth of Impatiens Hawkeri

试验采用水培的方法,研究4个不同硼浓度0.00、4.63×10-6、4.63×10-4、4.63×10-2mmol/L对新几内亚凤仙品种Harmony Super Red(红花)生长发育的影响。结果表明:低硼胁迫对新几内亚凤仙形态、生理均有显著影响。形态指标上作用效果显著,随着低硼胁迫的加剧,植株生长受到严重的抑制,株高降低,冠幅减小,叶片数量和开花数量减少,侧枝丛生状加剧。在生理指标上,极限缺硼时,根系活力、叶绿素含量、可溶性糖含量均降低。综合各项指标,4.63×10-4mmol/L的硼最适合凤仙花的生长。

This experiment was adopted the method of water culture, researched the effection of growth and development in Harmony Super Red with four different concemration（0. 00,4. 63×10^-6 ,4. 63×10^-4 ,4. 63 × 10^-1 mmol/L）. The resuits showed as following： the stress of low boron reflected sigrfificamly in the growth and development. Within the stress aggravated, Harmony Super Red was performed obviously in morphology： the growth was seriously inhibited, the hight, the crown, flowers and the volume of leaves was reduced, the collatral was growed thickly. The performance of development, when lack of boron seriously, the activity of roots, the content of chlorophyll and soluble-sugar were reduced. In a word, 4. 63 × 10^-4 rnmol/L was the best concentration for Harmony Super Red to growth.