Title: Rooting factors and optimization for propagation of Mytilaria laosensis cuttings
Abstract: Mytilaria laosensis is a multi-purpose tree planted in southern China, its breeding of clones by cutting propagation is deterred as levels of rooting factors are yet to be determined. This research is to determine levels of rooting factors through studying the effects of cutting type, leaf retention, medium type, plant growth regulator, and foliar fertilization on rooting performance of cutting of M. laosensis. Rooting rates, callus rate, and leaf-retention rates were tested by binomial test. Other indexes were tested by ANOVA. Results showed that stem cuttings of one-year-old seedling had a rooting rate of 81.7 percents in winter, which was significant higher at the significant level of 0.05 than those of sprouts on 5-year-old saplings(13.3 percents) and hard sapling branches(5.0 percents). Cuttings with leaf retaining had a significant higher rooting rate than those without a leaf retaining, however, there is no significant difference between cuttings with a leaf and those with half a leaf. For plant growth regulators, the highest rooting rate was observed in cuttings treated with ABT1# at a rate of 2 000.0 mg·L-1 for quick-dip for 10 s, it is significant higher than other treatments. For medium type, there is not significant different for rooting rate among red clay, mixture of red clay and peat(2: 1 in volume), mixture of peat and vermiculite(1: 1), and vermiculite, but they have a significant higher rooting rate than other medium. For a peat medium, cuttings had a significant longer root than other media; For a sand medium, cuttings had significant more primary roots (22.3 ± 2.7) than other media. The rooting rate of foliage-dressed cuttings is 78.0%, which is significant higher than that of the control without foliage dressing(52.0%). Thus, a clone for an elite individual of M. laosensis is probably bred by excising cuttings from basal sprouts, pruning them with a or half a leaf, treating them by 2 000.0 mg·L-1 ABT1# for 10 s quick-dip, raising them in a medium of vermiculite or laterite, and fertilizing them once a day for 30 days after planted. [Ch, 8 tab. 16 ref.]
Publication Year: 2016
Publication Date: 2016-06-01
Language: en
Type: article
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Cited By Count: 1
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