Application Of Rooting Hormone Research Articles

Asexual propagation for sustainable utilization of Greek indigenous germplasm of common dogwood (Cornus sanguinea L.), a neglected but noteworthy ornamental and nutraceutical species

The common dogwood (Cornus sanguinea L., Cornaceae) across the European continent represents a species with validated ornamental and nutraceutical value that has been utilized by humans for thousands of years but has been abandoned during modern times. It still represents however, a valuable but neglected native germplasm resource. The development of an asexual propagation protocol as a first step towards utilization of Greek C. sanguinea germplasm is presented herein for the first time. Plant material was collected from C. sanguinea‘s natural habitat during winter dormancy (hardwood cuttings) as well as during early vegetative growth (softwood cuttings). The propagation protocol was developed through preliminary trials for the successful propagation of the material sourced directly from the wild to establish enough starting material (ex situ adapted mother plants); consecutively, cutting propagation experiments over a two-year period coupled with early plant growth and survival assessment were conducted. The results showed that the use of external indole-3-butyric acid (IBA) rooting hormone application between 2,000 and 4,000 ppm delivered very high rooting rates (80-100%) via the use of primary softwood, leafy cuttings with minimum amount of lignification under mist. The proposed protocol is considered fast, reliable, easy to implement and economically viable. The study provides first time data on domestication and propagation of Greek C. sanguinea germplasm and at the same time paves the way for further research on the sustainable utilization of this species.

Evaluation of substrate composition and exogenous hormone application on vegetative propagule rooting success of essential oil hemp (Cannabis sativa L.).

To support the rapidly expanding industrial hemp industry, a commercial supply of high-quality starter plants with low genetic variability from nurseries will be key to consistent and efficient cultivation efforts. Rooting success was evaluated across four propagation medias, five rooting hormones, and eight commercially available high-cannabidiol (CBD) essential oil hemp cultivars. Cuttings were placed in a climate-controlled room and assessed for rooting success 12 days after cloning. Rooting success was determined by quantifying total root number, cumulative total root length, and total root mass. Propagation media had the greatest effect on rooting success (13-80%). Rockwool had the highest rooting success resulting in 10-fold increases in rooting traits over the next highest scoring medium (Berger BM6). Hormone applications significantly improved (15- to 18-fold) rooting success compared to no hormone application, while non-statistical differences were observed across auxin hormone concentrations and application methods. Genetic variation in rooting response was observed between cultivars with 'Cherry Wine' outperforming all other cultivars with an approximate 20% increase in rooting success over the next highest rooting cultivar, 'Wife'. Although the ideal combination was not specifically identified in this study, findings provide insight into how rooting hormone application and medium selection impact vegetative propagule rooting success of essential oil hemp.

UJICOBA MEDIA AKAR DAN ZAT PENGATUR TUMBUH PADA STEK PUCUK TANAMAN GYRINOPS VERSTEEGII

The success of the shoot cutting can be influenced by the rooting media and rooting hormone application. This research aim to determine increasing of the success percentage of shoot cutting that influenced the rooting media and hormone. The trial was made by two design, they are the rooting hormone test and the rooting media test. Six media used on the RCBD design, they are soils, soil + compost (3:1), cocopeat+ sand (1:1), cocopeat+ sand + compost (1:1: 2 ), soil +cocopeat+ sand (2:1:1), dan soil +cocopeat+ sand + compost ( 5 : 3 : 3 : 4 ) . On the rooting hormone test use the two kind of hormone they are IBA and NAA with the concentration on 100ppm, 200ppm, 300ppm and the 0ppm for control unit. The result show that the soil and the IBA on 200ppm have the highest success percentage of rooting. Keywords : rooting media, gaharu, cutting