Rooting of semi-hardwood stem cuttings from current year shoots ofDrymis brasiliensis

Ciência Rural

Koehler, Henrique Soares²  Radomski, Maria Izabel¹  Zem, Luciele Milani²  Zuffellato-Ribas, Katia Christina² 

[1] Embrapa Florestas, Colombo, Brazil;Universidade Federal do Paraná (UFPR), Curitiba, Brazil

关键词:  Winteraceae;    Cataia;    indole-3-butyric acid;    cuttingsRESUMO:Drimys brasiliensisMiers é uma Angiosperma nativa da Mata Atlântica conhecida popularmente como cataia;   

DOI  :  10.1590/0103-8478cr20141486

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

:Drimys brasiliensisMiers is an Angiosperm native to the Atlantic Rainforest, commonly known as cataia. Because of dormancy of its seeds, due to embryonic immaturity, production of cataia seedlings presents challenges regarding propagation of the species. Thus, cuttings emerged as a possible technique to be applied, diminishing plants production time and ensuring uniformity of rooting. Stem cuttings from current year shoots were collected in autumn/2012, prepared with 10-12cm in length, a bevel cut on base and straight on top, keeping two leaves, one leaf or no leaves in the apical portion. After disinfestation, bases of cuttings were submitted to the following treatments with indole-3-butyric acid (IBA) in 50% hydro-alcoholic solution: 100% water, 0, 500, 1500, 3000, 4500 and 6000mg L-1 IBA. A completely randomized experimental design was used, with 3 types of cutting x 7 IBA concentrations, with four replicates of 10 cuttings per experimental unit. After 120 days, the variables percentage of rooted cuttings, number of roots per cutting, length of the three longest roots per cutting, percentage of cuttings with callus, alive and dead, with new shoots and the cuttings maintaining the original leaves were assessed. The application of IBA had no influence on any of the assessed variables. Cuttings with two leaves presented the best rooting percentage (51.1%) and the lowest mortality (5.4%), when compared to cuttings with one leaf (35.0%) or without leaves (0.4%). Cuttings without leaves are to be avoided, since they present the highest mortality percentage (93.6%).

【 授权许可】

Unknown