不同浓度NAA对彩叶芋水培扦插繁殖的影响

Effects of different concentrations of NAA on cutting propagation of Caladium bicolosr under hydroponics

以带叶柄的‘Red Flash’彩叶芋(Caladium bicolosr)的叶为试材,在水培条件下比较不同浓度NAA(0、0.5、1.0、2.0、4.0 mg/L)处理对其不定根的形成、植株生长、色素含量、可溶性糖含量、可溶性蛋白质含量及根系活力的影响,以期建立彩叶芋的水培扦插繁殖体系。结果表明,所有处理材料水培扦插30 d后生根率均达100%,但不同处理对根的形成、植株生长及相关生理指标有不同的影响。2.0 mg/L NAA处理对彩叶芋水培扦插后植株的生长效果最佳,该处理对水培扦插苗的色素含量、可溶性蛋白质含量、根系活力均有明显的促进作用。

The leaves of the‘Red Flash’(Caladium bicolosr)with a leaf stalk were used as the test material.To establish a feasible protocol for cutting propagation of Caladium bicolosr under hydroponics,the leaves with petiolecuttings were treated with different con⁃centrations of NAA(0、0.5、1.0、2.0、4.0 mg/L)and then cultured in nutrient solution,respectively,and effects of the NAA treatments on the adventitious root formation,plantlet growth,pigment content,soluble sugar content,soluble protein content and root activity were compared.Results showed that the rooting percentage of all the treatments reached 100%,while different treatments had different effects on root formation,plant growth and related physiological indexes.Taken together,2.0 mg/L was the optimal concentration of NAA for the plant growth,and this treatment had obviously positive effects on the pigment content,soluble protein content and root ac⁃tivity of the plantlets.