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Adventitious rooting of conifers: influence of biological factors
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Orientador(es)
Resumo(s)
Vegetative propagation of superior conifer trees
can be achieved, e.g., through rooted cuttings or rooted
microshoots, the latter predominantly through in vitro tis sue culture. Both techniques are used to achieve rapid
multiplication of trees with favorable genetic combinations
and to capture a large proportion of the genetic diversity in
a single generation cycle. However, adventitious rooting of
shoots (cuttings) is often not efficient due to various
problems, such as scarcity of roots and cessation of their
growth, both of which limit the application of vegetative
propagation in some conifer species. Many factors are
involved in the adventitious rooting of shoots, including
physical and chemical ones, such as plant growth regula tors, carbohydrates, light quality, temperature and rooting
substrates, or media [reviewed by Ragonezi et al. (Trees
24(6):975–992, 2010)]. The focus of this review is on
biological factors, such as inoculations with Agrobacterium
rhizogenes, plant-growth promoting rhizobacteria and other endophytes, and mycorrhizal fungi, which were
found to stimulate adventitious rooting. These microor ganisms could contribute not only to adventitious root
development but also to help in protecting conifer plants
against pathogenic microorganisms, facilitate acclimation
and transplanting, and contribute to more sustainable,
chemical-free forests.
Descrição
Palavras-chave
Biotization Mycorrhization Plant-growth promoting bacteria Gymnosperms . Escola Superior de Tecnologias e Gestão
Contexto Educativo
Citação
Zavattieri, M. A., Ragonezi, C., & Klimaszewska, K. (2016). Adventitious rooting of conifers: influence of biological factors. Trees, 30(4), 1021-1032.
Editora
Springer