Genetic control of coppice and lignotuber development in Eucalyptus globulus

Whittock, Simon P.; Apiolaza, Luis A.; Kelly, C. M.; Potts, Brad M.

doi:10.1071/bt02049

Cited by 48 publications

(38 citation statements)

References 23 publications

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“…Certainly, resprouting is heritable and can even operate at the population and subregional scales (Lamont and Connell 1996;van der Bank et al 1999). The ability to form lignotubers, for example, is genetically controlled (Mullette and Bamber 1978;Whittock et al 2003;Verdaguer and Ojeda 2005).…”

Section: Trait Evolutionmentioning

confidence: 99%

Fitness and evolution of resprouters in relation to fire

Lamont

Enright

2011

Plant Ecol

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There are many ways that plants may recover vegetatively from dieback caused by fires. Compared with fire-killed species, the presence of woody resprouters in fire-prone floras increases with fire frequency, though this is affected by site productivity that may have opposing correlates along different gradients. Population recovery is enhanced by resprouting when fecundity is low and/or seedling recruitment is not guaranteed. There is resource cycling between vegetative growth and storage but no clear trade-off between fecundity and storage, and more attention needs to be given to the role of somatic mutations in reducing fecundity. Seven fitness benefits of post-fire resprouting are noted that centre around the rapid return to adult growth rates and early flowering and seed set without the risks of recruitment failure. The extent of resprouting at the individual, population, and species levels varies greatly but it is under genetic control. Recent studies on the evolution of resprouting in fire-prone systems have shown that types of resprouting (clonality, rootstocks, epicormic bud strands) are derived from surrounding parent lineages lacking these traits and confined to nonfire-prone environments. The oldest lineages with firerelated resprouting date to at least 61 million years ago, indicating that seed plants have had a long evolutionary relationship with fire. Various genetic mechanisms, including beneficial somatic mutations, have been invoked to explain how speciation of resprouters may keep pace with non-sprouters.

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Section: Trait Evolutionmentioning

confidence: 99%

Fitness and evolution of resprouters in relation to fire

Lamont

Enright

2011

Plant Ecol

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“…Although mature individuals of forest tree species pose problems during rooting, the species like eucalypts generate juvenile shoots from the epicormic buds or crown buds when the tree is coppiced and these shoots are generally amenable for adventitious rooting. However, in certain genotypes of eucalypts the coppice shoot induction response and adventitious rooting were poor (Whittock et al 2003;Mankessi et al 2011). The rooting potential of the mature tree was influenced by age, capacity of epicormic buds to sprout and physiological status of the tree (Clarke et al 2013).…”

Section: Resultsmentioning

confidence: 97%

Micropropagation of Eucalyptus camaldulensis for the production of rejuvenated stock plants for microcuttings propagation and genetic fidelity assessment

et al. 2014

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Adventitious rooting, a key step in clonal propagation is affected by tree maturation. Micropropagation followed by microcuttings propagation has the potential to rejuvenate the clones thereby enhancing the rooting potential and minimize intra clonal variation. In this study, 33 superior performing Eucalyptus camaldulensis clones were propagated by rooting of stem cuttings (SCs) and micropropagation. Micropropagated plantlets were used as stock plants for microcutting propagation. Rooting of SCs and micropropagation was carried out with the coppice shoot cuttings and axillary buds respectively, obtained from approximately fourteen year old trees that had undergone one vegetative propagation cycle. The adventitious rooting recorded was significantly higher in micropropagation (24.8-100 %) and microcuttings (43-95 %) than SCs method (9.3-75.5 %). Studies on ontogeny of adventitious rooting showed the emergence of root primordium from the phloem region and root initials were noticed within 5-9 days after auxin treatment. Further, molecular marker analysis showed genetic uniformity except for two ramets, detected using inter simple sequence repeats (ISSR) markers and suitable corrective measures were taken to avoid entry of such plantlets for mass multiplication. This study demonstrates the importance of integration of micropropagation and microcuttings production for rejuvenation and mass multiplication. Although current rejuvenation and root induction treatments favored adventitious rooting, the basic mechanisms involved in rejuvenation and adventitious rooting need to be explored for hassle free industrial rooting process, consequently cost effective propagation.

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“…A study in E. globulus shows that coppicing is influenced by lignotuber development, seedling stem diameter and vigorous growth before felling [32], but other factors such as condition of stump, cutting height and harvest season can also impact coppicing. During harvesting, bark can peel off easily from the stump, thereby reducing the chances of coppice.…”

Section: Harvest Management (Cutting Height Season and Frequency)mentioning

confidence: 99%