Hybrids and mini-cutting: a powerful combination that has revolutionized the Eucalyptusclonal forestry

Assis, Teotônio Francisco de

doi:10.1186/1753-6561-5-s7-i18

Cited by 22 publications

(10 citation statements)

References 5 publications

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“…The authors verified that the increase in temperature in the cultivation bed, influenced by the season of the year, positively favored the quality and production of shoots, regardless of the clone garden type. Assis (2011) states that the use of transparent plastic as cover in clone gardens with mini polytunnels keeps the shoots' environment warm and humid, what increases the productivity and rooting of the shoots. The same was also observed for black wattle individuals during mild temperature seasons (autumn and winter).…”

Section: Discussionmentioning

confidence: 99%

Use of Mini Polytunnels for the Maintenance of a Clone Garden of Acacia Mearnsii De Wildeman in Different Seasons of the Year

Flôres

Engel

Ikeda

et al. 2018

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The aim of this study was to verify the influence of mini polytunnels on the quality of shoots produced in a black wattle clone garden. The treatments used were: T1 – clone garden with mini polytunnels inside the greenhouse; T2 – clone garden with no mini polytunnels inside the greenhouse; T3 – clone garden with mini polytunnels outside the greenhouse; and T4 – clone garden with no mini polytunnels outside thegreenhouse. These four treatments formed a 4 x 3 factorial along with three seasons of the year: winter/2015, summer/2015-2016, and autumn/2016. A randomized block design was used with six blocks and ten cuttings per plot. Survival rate, number of shoots per cutting, and mean shoot length were evaluated. Shoots were collected from the cuttings and a rooting experiment with the same design was installed. Rooting rate, rate of shoots with calluses, number of roots per shoot, and mean shoot length per cutting were evaluated. There was interaction between the environment in the clone garden and the season of the year. In the winter, the treatment with mini polytunnels outside the greenhouse (T3) showed the best results, mainly in what concerns to the rooting of shoots. Shoots survived in the four clone garden environments, and the lowest survival rates were observed in the autumn/2016 season. The best responses were observed in the summer season.

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Section: Discussionmentioning

confidence: 99%

Use of Mini Polytunnels for the Maintenance of a Clone Garden of Acacia Mearnsii De Wildeman in Different Seasons of the Year

Flôres

Engel

Ikeda

et al. 2018

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“…More recently, the use of plastic mini-tunnels (MTs) has been shown to enhance mini-stump branching rates and cutting AR development in Eucalyptus spp. [ 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Environmental Modulation of Mini-Clonal Gardens for Cutting Production and Propagation of Hard- and Easy-to-Root Eucalyptus spp

Vilasboa

Costa

Fett-Neto

2022

Plants

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Clonal Eucalyptus propagation is essential for various industry sectors. It requires cuttings to successfully develop adventitious roots (ARs). Environmental conditions are influential on AR development and may be altered to modulate the productivity of hard-to-root clones. The current knowledge gap in research on the physiological patterns underlying commercial-scale propagation results hinders the design of novel strategies. This study aimed to identify patterns of variation in AR-relevant parameters in contrasting seasons and species with distinct rooting performances. E. dunnii and E. ×urograndis (hard- (hardR) and easy-to-root (easyR), respectively) mini-stumps were subjected to light modulation treatments and to mini-tunnel use (MT) for a year. The treatment impact on the branching and rooting rates was recorded. The carbohydrate content, AR-related gene expression, and mineral nutrition profiles of cuttings from the control (Ctrl) and treated mini-stumps were analyzed. Light treatments were often detrimental to overall productivity, while MTs had a positive effect during summer, when it altered the cutting leaf nutrient profiles. Species and seasonality played large roles in all the assessed parameters. E. ×urograndis was particularly susceptible to seasonality, and its overall superior performance correlated with changes in its gene expression profile from excision to AR formation. These patterns indicate fundamental differences between easyR and hardR clones that contribute to the design of data-driven management strategies aiming to enhance propagation protocols.

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“…The production and use of good quality cuttings for commercial plantations is extremely important to obtain high productivity from Eucalyptus plantations (Assis, 2011, Freitas et al, 2009). According to Carneiro (1995), cutting quality is directly related to increased survival and initial growth of recently established plantations.…”

Section: Introduction and Objectivesmentioning

confidence: 99%

Correlations between Eucalyptus Clonal Cutting Quality and Performance after Planting

Figueiredo

Carneiro

Penchel³

et al. 2019

Floresta Ambient.

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This study assessed correlations of different characteristics of cuttings in the nursery of three hybrid clones of Eucalyptus grandis × Eucalyptus urophylla and growth in height after planting. The characteristic that presented greatest correlation with the initial growth was the canopy height and cutting height ratio. At 12 and 24 months in the field, the stem diameter was more important. The parameters assessed in the nursery that correlated positively with growth in the field at three and six months after planting were height, number of leaf pairs, number of root deformations and clod length. At 12 and 24 months the parameters that correlated negatively were diameter, number of leaf pairs and the number of root deformations. Despite presenting significant correlation, root deformations did not interfere in the initial growth of the plants under high rainfall conditions, but the effects became harmful over time resulting in a reduction in plant growth.

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Hybrids and mini-cutting: a powerful combination that has revolutionized the Eucalyptusclonal forestry

Cited by 22 publications

References 5 publications

Use of Mini Polytunnels for the Maintenance of a Clone Garden of Acacia Mearnsii De Wildeman in Different Seasons of the Year

Use of Mini Polytunnels for the Maintenance of a Clone Garden of Acacia Mearnsii De Wildeman in Different Seasons of the Year

Environmental Modulation of Mini-Clonal Gardens for Cutting Production and Propagation of Hard- and Easy-to-Root Eucalyptus spp

Correlations between Eucalyptus Clonal Cutting Quality and Performance after Planting

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