生長素與節位成熟度對豔果金絲桃插穗發根之影響

Effect of Auxins, and Node maturity on Rooting of Hypericum androsaemum L. Cuttings

褚哲維(Che-wei Chu) ； 莊耿彰(Keng-Chang Chuang) ； 謝廷芳(Ting-Fang Hsieh)

《植物種苗》 17卷2期 (2015/06) Pp. 47-59

摘要

本研究測試NAA 與IBA 二種生長素之不同濃度對於豔果金絲桃(Hypericum androsaemum L.)四品種插穗發根之影響，結果顯示二種生長素皆能使豔果金絲桃之插穗發根，其中除了1.5 g/Kg IBA 處理H104001 品種發根率為88.9％之外，其餘皆達100％。在插穗的發根根數上，以IBA 處理較NAA 處理為佳，且以1 g/Kg IBA 的效果最為顯著。就發根指數而言，以0.5 和1.0 g/Kg 的IBA 與1.0 和1.5 g/Kg 的NAA 處理供試的四個品種時，皆可獲得最佳的發根指數，處理間無顯著差異。另外，利用不同成熟節位的枝條進行扦插試驗，發現採取頂梢和未木質化之節位作為插穗時，其發根根數最佳，頂梢發根率最高，皆達100％，而以木質化節位作為插穗時之發根效果最差。

關鍵字

豔果金絲桃 ； 插穗 ； 生長素 ； 發根指數

並列摘要

The survival rate of Hypericum cuttings is always lower when farmers propagated the cutting plants by themselves. The purpose of this study is to find out the suitable way to solve the problem. The auxin application and node maturity of cuttings were assessed for their efficiency on rooting of four varieties of Hypericum androsaemum L. All assays were carried out in net house of Floriculture Research Center, TARI. The results showed that different types and concentrations of auxins affected the rooting efficiency of H. androsaemum. All the cuttings reached 100％ rooting after all the concentration of auxin treatment exception of 1.5 g/Kg IBA treatment. In general, the root number of H. androsaemum cuttings was induced more by IBA treatment than that of NAA treatment. The maximum root number was obtained from 1.0 g/Kg IBA treatment. The highest rooting index was obtained by treating with 0.5 and 1.0 g/Kg of IBA and 1.0 and 1.5 g/Kg of NAA. In the assay of cutting maturity on rooting of four varieties of H. androsaemum, data showed that using the non-woody part of stem as cuttings resulted in higher rooting rate and rooting index, especially using the top part of stem as cuttings.

並列關鍵字

Hypericum androsaemum L. ； cutting ； auxin ； rooting index