Optimizing root cutting success in<i>Paulownia</i>spp.

Ede, F. J.; Auger, M. A.; Green, T.G.A.

doi:10.1080/14620316.1997.11515504

Cited by 16 publications

(22 citation statements)

References 2 publications

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“…Steud. (Ede et al 1997), where no clear differences were found between the number of shoots and roots produced near the main tree and those produced at the extremity. Our data, however, contrast with results presented by Houmey et al (2007) who found the middle part of the root better at producing shoots than the proximal or distal parts.…”

Section: Discussionmentioning

confidence: 88%

“…This was expected because of hormonal control, a mechanism which interacts with carbohydrate supply for bud initiation and subsequent growth from root segments of woody plant species (Eliasson 1971b, Schier and Campbell 1976, Robinson and Schwabe 1977a, Ede et al 1997). According to these authors, the polarity is due to the transport of auxin, a shoot suppression hormone that is acropetal in roots, away from the proximal end towards the root tip.…”

Section: Discussionmentioning

confidence: 98%

“…Our data, however, contrast with results presented by Houmey et al (2007) who found the middle part of the root better at producing shoots than the proximal or distal parts. As thickness and location are related to each other, the location of the root segment is often significantly correlated with cutting regeneration ability (Ede et al 1997); thicker root segments originating near the root collar usually produce more shoots, faster and more efficiently than thinner cuttings from the distal parts of the root system.…”

Section: Discussionmentioning

confidence: 99%

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Clonal propagation of Detarium microcarpum from root cuttings

Ky-Dembele¹,

Tigabu²,

Bayala³

et al. 2010

Silva Fenn.

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Detarium microcarpum is a valuable tree species for fuelwood, timber, food and medicine in sub-Saharan Africa. However, its population is dwindling due to overexploitation, its seedlings' low survival rate and slow growth. Vegetative propagation might enhance both survival and growth, but to date a successful clonal method does not exist for D. microcarpum. We conducted four experiments to examine the effects of propagation environment (high versus low humidity), cutting length and diameter, alignment of root segments (horizontal versus vertical) and distance from the root collar of donors on the regeneration ability of root segments collected from field-grown D. microcarpum trees in Burkina Faso. The size of root segments significantly affected their regeneration ability, while alignment had no effect. Sprouting was possible from 10 and 20-cm long segments of 15-60 mm diameter with 7-43% sprouting efficiency and multiple shoots while 5 cm long segments were unsuitable with 0-3% sprouting efficiency. Cuttings maintained at low humidity produced larger diameter sprouts than those in greenhouse. All cuttings showed strong polarity with most of the shoots developing at the proximal end. Rootlings from 20 cm root segments produced more new roots (0.62 ± 0.08 g) than those from 10 cm segments (0.34 ± 0.09 g), but they were similar for sprout and leaf growth. We conclude that lateral roots of field-grown mature trees can be used to produce rootlings in a nursery. Since this study is the first attempt to propagate D. microcarpum from root cuttings, further investigations are required to optimize the technique.

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Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

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Clonal propagation of Detarium microcarpum from root cuttings

Ky-Dembele¹,

Tigabu²,

Bayala³

et al. 2010

Silva Fenn.

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“…Therefore, other easy and costeffective method for clonal propagation is needed for M. volkensii. Root cutting is one of the general clonal propagation method, and it's use have been reported in various species such as Populus tremuloides (Schier, 1974;Snedden et al, 2010), Populus tremula×Populus tremuloides (Stenvall et al, 2004), Paulownia tomentosa, Paulownia fortunei (Ede et al, 1997), Prunus avium (Ghani and Cahalan, 1991) and Detarium microcarpum (Ky-Dembele et al, 2010). These studies have identified the effects of some factors on the succession of root cutting.…”

Section: Introductionmentioning

confidence: 99%

“…These studies have identified the effects of some factors on the succession of root cutting. For example, Ede et al (1997) reported the importance of root size (whether > 5 mm of diameter of root cut edge or not) and the position where the root was obtained. Ky-Dembele et al (2010) also reported significant effect of root size (> 10 cm of length and 15 mm of diameter) and no effect of root alignment on succession of root cutting.…”

Section: Introductionmentioning

confidence: 99%

Optimizing the size of root cutting in Melia volkensii Grke for improving clonal propagation and production of quality planting stock

Hanaoka¹,

Ohira²,

Matsushita³

et al. 2016

Afr. J. Biotechnol.

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Melia volkensii is a tree species growing in semi-arid regions of East Africa, and is recognized as one of the most valuable forestry species in such regions of Kenya. The use of root cutting is an easy method for its clonal propagation, but the most appropriate conditions have not been systematically examined. In this study, the relationship between diameter of root cut edge or fresh weight and formation frequency of adventitious bud were assessed. In addition, roots were divided into two fragments, and formation frequency of adventitious bud was compared between cross-sections roots without root tip and roots with root tip. Both the diameter of the cut edge and fresh weight of roots forming adventitious buds were significantly higher than in those not forming them (unpaired t-test, p<0.01). Formation frequency of adventitious bud was 77.0% in roots satisfying the criteria of cut edges diameter >15 mm and fresh weight >20 g, but it decreased (37.2%) in roots that did not meet this criteria. Based on anatomical analysis, an effect of the developmental stage of root fragments on adventitious bud formation was suggested, and root size is thought to reflect the stage of root development. The formation frequency of adventitious buds was 72% even in cross-sectioned roots, and the proportion was not significantly different from that of normal root tip (p>0.05). Therefore, it is concluded that root cutting using cross-sectioned roots are also available for clonal propagation.

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Search for optimum conditions of Paulownia autohydrolysis process and influence in pulping process

García

Zamudio

Pérez

et al. 2011

Env Prog and Sustain Energy

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In this study we evaluated the potential of a species trihybrid fortunei Paulownia, tomentosa and elongata as an industrial crop in terms of its contents in holocellulose, lignin, xylo-oligomers, monomers and other glucan and its aprovecahamiento for making cellulose pulp. Well optimized biomass autohydrolysis processes yield valuable liquid and solid phases that can be used to produce liquid fuels and cellulosic pulp. This study focused on the optimization of autohydrolysis temperature and time during processing of Paulownia fortunei x Tormentose x Elongate hybrid wood.. The process was modelled in order to optimize the extraction of xylo-oligomers and xylose in the liquid phase while preserving the integrity of cellulose fibres. The optimum processing conditions (viz. temperatures of 180-195 °C and operating times of 0-15 min) provided an acceptable solid phase yield (70%), while maintaining a high xylose and xylo-oligomer contents in the liquid phase. Soda -anthraquinone pulping of solid fraction provide 60.6 % pulp yield at kappa number 33 and a viscosity of 787 cm 3 /g. The autohydrolysed chips required 16.6 % less alkali than the regular chips to achieve kappa number 33.Keywords: Autohydrolysis, biorefinery, paulownia, soda-AQ pulp, saccharides. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 F o r P e e r R e v i e w 3 Page 2 of 22 John Wiley & Sons 2t-S-1Ed-D-P INTRODUCTIONThe current European social development concerning the use of natural resources is not sustainable since it is largely based on fossil fuels, which are non-renewable and release large quantiteis of CO 2 to the atmosphere. There is a shortage of renewable raw materials in the market to attend the energy, pulp & paper and chemical industry sectors. The way to a sustainable development and resource renewability includes the searching/use of new resources and chemical and consumption products with which the lignocellulose forest biomass, and specially that one of high production of biomass capacity (energetic crops), shows as a "necessary" source of raw material due to its ubiquity, availability and "low pollutant character" [1,2]. Biomass components fractionation would also allow the disposal of a variety of chemical products, for which technological development requires the integration of all stages, from farming and harvesting to the stages of fractioning and conversion to different products [3].Paulownia crops present very high productions of biomass and re-sprouting capacity (more than 50 tons/ha/year, specially in annual crops, which are among the highest growing levels described in the literature [4].Paulownia is one of these crops with very high productions of biomass and re-sprout capacity (more than 50 tons/ha/year, specially in annual crops, which are among the highest growing levels described in the bibliography [5]. Paulownia is a specie us...

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Optimizing root cutting success inPaulowniaspp.

Cited by 16 publications

References 2 publications

Clonal propagation of Detarium microcarpum from root cuttings

Clonal propagation of Detarium microcarpum from root cuttings

Optimizing the size of root cutting in Melia volkensii Grke for improving clonal propagation and production of quality planting stock

Search for optimum conditions of Paulownia autohydrolysis process and influence in pulping process

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