Rooting of stem cuttings of Populus x euramericana under different water potentials

Puri, Sunil; Thompson, F.B.

doi:10.1051/forest:19890527

Cited by 4 publications

(2 citation statements)

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“…The leaves present in cuttings supply necessary root-promoting substances (Hartmann et al, 1981;Nanda and Kochhar, 1995;and Pant and Joshi, 1999) probably by performing photosynthesis during propagation (Mesen et al, 1997;Pant and Joshi, 1999), as is the case in the present study, in which a good number of leaves on the upper portion of the cuttings were kept intact. In the cuttings, where there was no root formation or it was delayed, the survival becomes very difficult or the cutting was likely to die (Dugma, 1988;Puri and Thompson, 1989).…”

Section: Resultsmentioning

confidence: 99%

Adventitious root formation in branch cuttings of Taxus wallichiana Zucc.(Himalayan yew): A clonal approach to conserve the scarce resource

Aslam¹,

Raina²,

Rafiq³

et al. 2017

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Himalayan yew (<em>Taxus wallichiana</em> Zucc.), is an economically valuable plant and critically endangered due to overexploitation for the isolation of Taxol,an exciting anticancer drug from its bark and leaves. Since the species is unisexual and due to its long seed dormancy period and rapid loss of viability coupled with low survival percentage, its natural regeneration from seeds is very poor. As the seed raised plants add little growth, propagation by stem cuttings was tried under natural conditions and a considerable success was achieved after making use of different auxins (Indole-3- Acetic Acid-IAA, Indole Butyric Acid-IBA and Naphthalene Acetic Acid-NAA) in different concentrations. A Randomized block design (RBD) was adopted for laying the experiment of the present study. Of the ten treatments studied, IBA at 500ppm performed best of all the treatments and registered higher callusing percentage, rooting percentage, number of roots and length of roots in the juvenile shoot cuttings of the species. The results achieved through the application ofplant growth regulators (PGRs)by way of adventitious root formation (ARF) could be useful for the management of this understory coniferous tree species, whether for conservation, habitat restoration or for the production of Taxol,a promising anti-cancer agent. The technique evolved will be the most handy, quickest, inexpensive and can be applied any where in its natural habitat for the restoration and restocking of this valuable plant, which is otherwise facing the peril of extinction throughout the range of its distribution including Indian Himalayas.

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Section: Resultsmentioning

confidence: 99%

Adventitious root formation in branch cuttings of Taxus wallichiana Zucc.(Himalayan yew): A clonal approach to conserve the scarce resource

Aslam¹,

Raina²,

Rafiq³

et al. 2017

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“…In a study evaluating the root distribution of 12-year-old hybrid poplars, 95% of the total number of roots were noted in the first 40 cm (Gray 2000). In addition, Puri and Thompson (2003) found that 80% of the roots whose diameter exceeded 5 mm were in the 0–60 cm stratum. These higher root densities at the soil surface could be explained by a variety of factors, including higher organic matter content, better aeration, and easier access to water resources (Crow and Houston 2004; McIvor et al 2009; Douglas et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Influence of competition on root architecture and root anchorage of young hybrid poplar plantations on waste rock slopes

et al. 2023

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Root systems are crucial to tree and soil stability in terms of mechanical support, but are rarely considered in revegetation studies. This study aimed at determining the effect of planting density and herbaceous hydroseeding on the root architecture and mechanical resistance to uprooting of planted hybrid poplars on waste rock piles. The study took place at an open pit gold mine in the Canadian boreal zone where a hybrid poplar plantation was established in 2013 on soil-covered waste rock slopes (33%). Four treatments were randomly distributed in three replicated blocks: 4 × 4 m, 2 × 2 m, 1 × 1 m between trees and 2 × 2 m + h, corresponding to trees spaced at 2 × 2 m with hydroseeding. Lateral uprooting tests of four-year-old hybrid poplars were conducted in the direction of the slope. Maximum resistance to the uprooting force was observed in the 2 × 2 m treatment. Root systems were more symmetrical, deep, branched, and had higher root diameters in the 2 × 2 m and 4 × 4 m treatments. In contrast, the treatments with greater intra-or interspecific competition showed shallower, asymmetrical root systems with smaller roots. Therefore, competition significantly reduced tree anchorage. RÉSUMÉLes systèmes racinaires sont essentiels à la stabilité des arbres et du sol en termes de support mécanique, mais sont rarement considérés dans les études de végétalisation. Cette recherche visait à déterminer l'effet de la densité de plantation et de l'hydroensemencement herbacé sur l'architecture racinaire et la résistance mécanique au déracinement de peupliers hybrides plantés dans les pentes de stériles. L'étude a eu lieu à une mine d'or à ciel ouvert située dans la forêt boréale canadienne. Une plantation de peuplier hybride a été installée en 2013 sur des pentes de stériles recouvertes de sol (3 H:1 V), avec quatre traitements répartis au hasard en trois blocs de répétition : 4 × 4 m, 2 × 2 m et 1 × 1 m d'espacement entre les arbres, ainsi que 2 × 2 m + h correspondant à un espacement de 2 × 2 m avec hydroensemencement herbacé. Des tests d'arrachement latéraux de peupliers hybrides âgés de quatre ans ont été effectués dans le sens de la pente. La résistance maximale à la force d'arrachement a été observée pour le traitement de 2 × 2 m. Les systèmes racinaires étaient plus symétriques, profonds, ramifiés et avaient des diamètres racinaires plus élevés pour les traitements 2 × 2 m et 4 × 4 m. En revanche, les traitements avec une plus grande compétition intra-ou interspécifique ont montré des systèmes racinaires moins profonds, asymétriques et avec des racines plus petites. Par conséquent, la compétition a réduit considérablement l'ancrage des arbres.

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Puri

Swamy

2001

Agroforestry Systems

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Rooting of stem cuttings of Populus x euramericana under different water potentials

Cited by 4 publications

References 4 publications

Adventitious root formation in branch cuttings of Taxus wallichiana Zucc.(Himalayan yew): A clonal approach to conserve the scarce resource

Adventitious root formation in branch cuttings of Taxus wallichiana Zucc.(Himalayan yew): A clonal approach to conserve the scarce resource

Influence of competition on root architecture and root anchorage of young hybrid poplar plantations on waste rock slopes

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