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Successful vegetative propagation by stem cuttings of Tetraena mongolica Maxim.
Techniques have been developed for the vegetative propagation of Tetraena mongolica, a rare and endangered species endermic to the western Ordos Plateau in the northcentral portion of China. The purpose of the study was to investigate the rooting characteristics of the plant species from the aspects of length and ages of cuttings, extemal hormone concentration, leaf retention, cutting orientations, and cutting positions. The results obtained from the experiments indicated that the rooting ratio of 2-year or 3-year old cuttings was larger than more than of 4-year old cuttings. The influence of external hormone concentration on rooting was obvious; the rooting ratio of cuttings was increased by external hormone treatment, especially when treated by ABT1 (ABT No.1 Rooting Powder) 50 mg/L for 3 hours, in which case, the roofing ratio reached 91 percent. Leaf retention influenced rooting significantly; the rooting rate of cuttings became greater as the leaf retention increased. There was no significant difference in rooting capability between south and north orientations of the ortets. The rooting ratio of the cuttings obtained from the distal portions of shoots was significantly larger than those obtained from the middle and the basal portions of the shoots. On day three after treatment, calluses started appearing at the incisions of some cuttings dipped in 500 mg/L IAA (indole acetic acid). Most cuttings were healed or swelled, and 6 percent of cuttings rooted on day 6 after treatment. Higher rooting period occurred 7-10 days after the experiment was set up.
作 者： ZhiGang Zhou GuoHou Liu Fang Luo 作者单位： ZhiGang Zhou,GuoHou Liu(College of Ecology and Environment Science, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, 010018, China)Fang Luo(College of Biological Science and Biotechnology, Beijing Forestry University, Beijing, 100083, China)
刊 名： 寒旱区科学（英文版） 英文刊名： SCIENCES IN COLD AND ARID REGIONS 年，卷(期)： 2009 1(5) 分类号： P5 关键词： Tetraena mongolica vegetative propagation stem cutting rooting characteristics【Successful vegetative propagation by】相关文章：