VEGETATIVE RESCUE AND CUTTINGS PROPAGATION OF Araucaria angustifolia (Bertol.) Kuntze

Wendling, Ivar; Brondani, Gilvano Ebling

doi:10.1590/0100-67622015000100009

Cited by 20 publications

(16 citation statements)

References 28 publications

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“…The rooting percentages observed in this study were low when compared to other forest species with established vegetative propagation protocols, like Eucalyptus (ALMEIDA et al, 2007;NEGISHI et al, 2014) and Ilex paraguariensis (BITENCOURT et al, 2009;WENDLING et al, 2013). Vegetative propagation by cuttings has been studied for several decades in conifers of the genus Pinus, and the species of this genus are considered of difficult propagation because in the majority of them there is no rhizogenesis if the propagules used are not obtained from juvenile plants generated by seeds (RAGONEZI et al, 2010).…”

Section: Discussioncontrasting

confidence: 54%

ROOTING OF Araucaria angustifolia: TYPES OF CUTTINGS AND STOCK PLANTS SEX

2016

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-Araucaria angustifolia is native to Brazil and has always raised economic interest for the qualities of its timber and as a supplier of pine nuts for human consumption. The scarce germination viability of the stored seeds and the possibility to produce rooted cuttings all year round make cuttings propagation a good alternative for the production of plants, giving also the possibility to obtain genetically superior clones. On this basis, we assessed the influence of stock plants sex and type of cuttings (apical and intermediate) on the percentage of survival, rooting and vigor of the cuttings, together with the efficiency of this technique in the production of rooted cuttings of this species. So, cuttings from orthotropic shoots, collected in a clonal garden composed by feminine and masculine plants, had their survival percentages assessed at 60, 90, 120 and 150 days after installation of the experiment (DAI). Rooting in full sunlight area after 180 days, together with vigor characteristics of roots and aerial portion at 120 and 180 DAI were also evaluated. At 180 DAI, apical female cuttings presented the greatest rooting percentage (53.7%), number of roots (1.2) and average length of roots at the bottom of the rooting tray (4.4 cm). On the other hand, the applied cuttings procedures showed to be adequate to increase the rooting percentages of the species, which, supported by the fact that this technique is important for the formation of rooted cuttings to be used in the mini-cuttings technique, indicates that it can be considered efficient.Keywords: Brazilian pine; Cloning; Cuttings production. ENRAIZAMENTO DE Araucaria angustifolia: TIPOS DE ESTACAS E SEXO DAS PLANTAS MATRIZESRESUMO -Araucaria angustifolia (araucária) é nativa do Brasil e sempre despertou interesse econômico por suas qualidades madeireiras e como fornecedora de pinhões para alimentação humana. A baixa viabilidade na germinação de suas sementes quando armazenadas e a possibilidade de produzir mudas durante o ano inteiro fazem com que a estaquia se apresente como alternativa para produção de mudas, gerando ainda a possibilidade de obtenção de clones geneticamente superiores. Com base nisso, avaliou-se a influência do sexo das matrizes e o tipo de estaca (apical e intermediária) na sobrevivência, enraizamento e vigor de suas estacas, bem como a eficiência desta técnica na produção de mudas da espécie. Para tanto, estacas de brotos ortotrópicos coletadas em jardim clonal de plantas masculinas e femininas foram avaliadas quanto à sobrevivência aos 60, 90, 120 e 150 dias após a estaquia (DAI) e o enraizamento a pleno sol aos 180 dias, bem como características de vigor radicial e aéreo aos 120 e 180 DAI. Aos 180 DAI, estacas femininas apicais apresentaram maior enraizamento (53,7%), número de raízes (1,2) e comprimento médio de raízes no fundo do tubete (4,4 cm). Por outro lado, os procedimentos de estaquia utilizados mostraram-se adequados para incrementar os percentuais de enraizamento da espécie, o que, aliado ao fato da técnica ser impor...

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Section: Discussioncontrasting

confidence: 54%

ROOTING OF Araucaria angustifolia: TYPES OF CUTTINGS AND STOCK PLANTS SEX

2016

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“…instead, they are hydrated and desiccation sensitive throughout Araucaria angustifolia (Bert.) O. Kuntze is a conifer species from the Atlantic Forest that presents recalcitrant seeds with significant ecological, economic and social importance in Brazil (Wendling & Brondani, 2015). Due to the intense exploitation of wood resources and expansion of agriculture, its distribution has been reduced to 2-4 % of the original area (Guerra, Silveira, Reis, & Schneider, 2002), and according to the iUCN Red List of Threatened Species, it is a "critically endangered species" (iUCN, 2013).…”

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confidence: 99%

Early harvest increases post-harvest physiological quality of Araucaria angustifolia (Araucariaceae) seeds

Shibata

Coelho²

2016

RBT

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Abstract:Araucaria angustifolia is a conifer native to Brazil and is an endangered species. Since this species seeds have a short period of viability, its vulnerability is higher. Thus the aim of this study was to evaluate the physiological quality of A. angustifolia seeds during the development and post-storage periods. For this, cones of A. angustifolia were collected from a natural population in Curitibanos, Santa Catarina, Brazil, in March, April, May and June 2012. The collected seeds were classified into developmental stages of cotyledonary, i, ii and iii according to the month of collection; a total of 10 cones were collected for each stage. Seeds were stored in a refrigerator for 60 and 120 days, and were submitted to a chamber germination test (25 °C-photoperiod 12 h). Additionally, seeds were tested for moisture content (105 °C for 24 hours), tetrazolium (0.1 % for 1 hour) and vigor (electric conductivity [75 mL distilled water at 25 °C], germination speed index, and shoot and root length). Our results showed that during seed development, moisture content decreased from the cotyledonary stage (66.54 %) to stage iii (49.69 %), and vigor increased in the last stage. During storage, moisture content at cotyledonary stage and stage i was stable. On the other hand, stored seeds exhibited a decrease in moisture content after 120 days at stages ii and iii. Physiological quality at the cotyledonary stage resulted in an increased germination rate of 86 % and 93 % after 60 and 120 days of storage, respectively; unlike stages ii and iii exhibited a decrease in seed viability and vigor after storage. Electrical conductivity was higher for fresh seeds at the cotyledonary stage, than for those stored for 60 and 120 days. However, in other stages, released leachate content after 120 days of storage, increased with the advance of the collection period. Germination speed index and shoot and root lengths after storage were highest for seeds at the cotyledonary stage and stage i; unlike stages ii and iii which had short root and shoot lengths during storage. Thus, the maintenance of seed moisture content during storage was variable and dependent on the period of collection. Furthermore, the physiological quality differed among earlier and later stages. Early collection favored seed physiological quality, and may be a strategy for better conservation of A. angustifolia seeds. Rev. Biol. Trop. 64 (2): 885-896. Epub 2016 June 01.Key words: recalcitrant seed, storage, seed development, gymnosperms, endangered plants.Seed development is a process that comprises a set of morphological, cellular, and biochemical/synthetic changes which commences with ovule fertilization to the moment in which the seed is mature (Bewley, Bradford, Hilhorst, & Nonogaki, 2013).Most seeds undergo a process of "maturation drying" with late stages of development, and these seeds are called orthodox (Roberts, 1973). Before or concomitant with maturation drying, seeds acquire desiccation tolerance, and can be dried to low water content (generally less ...

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“…Nevertheless, the few attempts related to vegetative propagation by cuttings of this species have not shown the aimed efficiency, with results that did not exceed 25% (Iritani and Soares, 1983) to 30% of rooting (Wendling and Brondani, 2015), even with the use of advanced propagation techniques via mini-cuttings (Pires et al, 2013). In addition, there are no studies about the assessment of the behavior of plants produced by cuttings in the field.…”

Section: Introductionmentioning

confidence: 98%

“…Plants production. Cuttings were produced with orthotropic shoots, derived from plants established in a field clonal garden (0.5 m x 0.5 m spacing), previously produced by cuttings with shoots from 30-years-old trees, subject to coppicing for basal orthotropic shoots obtainment, as detailed in Wendling and Brondani (2015). Cuttings were prepared with 15-20 cm long and 5-10 mm diameter, with removal of 1/3 of the basal needles, aiming to facilitate planting.…”

Section: Introductionmentioning

confidence: 99%

CLONAL FORESTRY OF Araucaria angustifolia: PLANTS PRODUCED BY GRAFTING AND CUTTINGS CAN BE USED FOR WOOD PRODUCTION1

Wendling

Stuepp

Santin³

et al. 2017

Rev. Árvore

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-Araucaria angustifolia (Brazilian Pine or Araucaria) is a potential native species to Brazilian forestry. However, a number of challenges and technical restraints still persist, making difficult its expansion as a species for forest plantations, among which the lack of cloning technologies evaluation in field conditions. So the present study aimed to evaluate the potential use of Araucaria plants produced by cuttings and grafting for wood production in comparison to those produced by seeds, by assessing field vigor and establishing a form factor for plantations with equivalent age. Plants from cuttings and seeds were planted in a 3 x 3 m spacing, being part of the last intended to be rootstocks for grafting. The experiment was conducted in a completely randomized design with three treatments and plots of a plant (one tree plot). Plants from cuttings had higher growth in diameter at breast height (7.4 ± 2.41 cm) and total height (4.2 ± 1.08 m) at 74 months after planting, followed by grafted plants and from seeds, with similar results. We conclude that cuttings and grafting are potential techniques for Araucaria plants formation for wood production, and, in particular, grafting is recommended by the easiness of in its application, besides the fact that it can be used for seed orchards formation and presents volumetric increase and form factor similar to seedlings.Keywords: Vegetative propagation methods; Volumetric increase; Growth habit. SILVICULTURA CLONAL DE Araucaria angustifolia: MUDAS PRODUZIDAS POR ENXERTIA E ESTAQUIA PODEM SER USADAS PARA PRODUÇÃO DE MADEIRARESUMO -Araucaria angustifolia (pinheiro-brasileiro ou araucária) é uma espécie nativa potencial para a silvicultura brasileira. No entanto, uma série de desafios e limitações técnicas ainda persistem, dificultando sua expansão como espécie para plantios florestais, dentre os quais se destaca a falta de avaliação de tecnologias de clonagem de materiais genéticos em condições de campo. O presente estudo objetivou avaliar a potencialidade da utilização de mudas de araucária produzidas por estaquia e enxertia para produção madeireira em comparação às produzidas por sementes, por meio da avaliação do vigor vegetativo a campo e assim estabelecer um fator de forma para plantios com idade equivalente. Mudas provenientes de estaquia e de sementes foram plantadas a campo em espaçamento 3 x 3 m, sendo parte das últimas destinadas a servirem de porta-enxertos para enxertia. O experimento foi conduzido num delineamento inteiramente casualizado, com três tratamentos e parcelas de uma planta (one tree plot). Plantas provenientes de estaquia apresentaram maior crescimento em diâmetro a altura do peito (7,4 cm) e altura total (4,2 m) aos 74 meses após o plantio, seguidas das mudas de enxertia e sementes, com resultados similares. Conclui-se que a estaquia e a enxertia são técnicas potenciais para a produção de mudas de araucária para fins madeireiros, sendo, de modo especial, a enxertia 2 Revista Árvore. 2017;41(1):e410117Wendling I, et al.recomendada pela f...

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VEGETATIVE RESCUE AND CUTTINGS PROPAGATION OF Araucaria angustifolia (Bertol.) Kuntze

Cited by 20 publications

References 28 publications

ROOTING OF Araucaria angustifolia: TYPES OF CUTTINGS AND STOCK PLANTS SEX

ROOTING OF Araucaria angustifolia: TYPES OF CUTTINGS AND STOCK PLANTS SEX

Early harvest increases post-harvest physiological quality of Araucaria angustifolia (Araucariaceae) seeds

CLONAL FORESTRY OF Araucaria angustifolia: PLANTS PRODUCED BY GRAFTING AND CUTTINGS CAN BE USED FOR WOOD PRODUCTION1

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