Reproductive biology of the “Brazilian pine” (Araucaria angustifolia – Araucariaceae): Development of microspores and microgametophytes

Kuhn, Sofia Aumond; Mariath, Jorge Ernesto de Araújo

doi:10.1016/j.flora.2014.02.009

Cited by 8 publications

(5 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Like most conifers, araucaria propagation is made by seeds (KUHN;MARIATH, 2014). Due to low longevity of the seeds, high genetic variability, and undefined sex until reproductive maturity, some studies have aimed to develop vegetative propagation techniques (DIAS et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

ROOTSTOCK AGE AND GROWTH HABIT INFLUENCE TOP GRAFTING IN Araucaria angustifolia

Gaspar

Wendling

Stuepp

et al. 2017

CERNE

View full text Add to dashboard Cite

ABSTRACT:The objective of this study was to evaluate the technical viability and influence of the rootstock age and grafts growth habit on Araucaria angustifolia top grafting. Two rootstocks (8 and 35-year-old) were grafted with grafts originating from two growth habits (orthotropic and plagiotropic). We used the patch grafting technique in the middle and upper third of the crown of 8-year-old trees, and in the middle and lower third of 35-year-old trees, always near the apex in primary branches. The experiments were performed during the fall and spring/2015. The treatments consisted of: 8-year-old rootstocks and orthotropic grafts; 8-year-old rootstocks and plagiotropic grafts; 35-yearold rootstocks and plagiotropic grafts; 35-year-old rootstocks and orthotropic grafts. We evaluated graft survival throughout the experiment and at 16 months, we evaluated their survival, emission, and number and average length of sprouts. Top grafting is technically feasible for araucaria, with better results using younger rootstocks (8-year-old), especially with plagiotropic propagules and grafting in fall/2015 (71.9%). Growth habits of the grafts are maintained identically as original, independently of rootstock growth habit. IDADE DO PORTA-ENXERTO E HÁBITO DE CRESCIMENTO INFLUENCIAM NA ENXERTIA DE COPA EM Araucaria angustifolia RESUMO:O presente trabalho objetivou avaliar a viabilidade técnica e a influência da idade do porta-enxerto e do hábito de crescimento na enxertia de copa em Araucaria angustifolia. Foram utilizados porta-enxertos de duas idades (8 e 35 anos), com enxertos originários de dois hábitos de crescimento (ortotrópicos e plagiotrópicos). A enxertia foi realizada por borbulhia de placa, no terço médio e superior da copa das árvores de 8 anos e no terço médio e inferior das árvores de 35 anos, sempre próximo ao ápice em ramos primários. Os experimentos foram instalados em duas épocas, no outono e na primavera de 2015. Os tratamentos consistiram de: Porta enxertos com 8 anos de idade e enxertos ortotrópicos; Porta enxertos com 8 anos de idade e enxertos plagiotrópicos; Porta enxertos com 35 anos de idade e enxertos plagiotrópicos; Porta enxertos com 35 anos de idade e enxertos ortotrópicos. Foram avaliadas a sobrevivência dos enxertos ao longo do experimento e aos 16 meses, sua sobrevivência, a emissão, número e comprimento médio de brotações. A enxertia de copa é viável tecnicamente para araucária. O uso de porta-enxertos mais jovens (8 anos) é favorável a sobrevivência dos enxertos, especialmente quando da utilização de propágulos plagiotrópicos e enxertia realizada no outono (71,9%

show abstract

Section: Introductionmentioning

confidence: 99%

ROOTSTOCK AGE AND GROWTH HABIT INFLUENCE TOP GRAFTING IN Araucaria angustifolia

Gaspar

Wendling

Stuepp

et al. 2017

CERNE

View full text Add to dashboard Cite

show abstract

“…Kuntze (Araucariaceae), popularly known as araucaria or Brazilian pine, is the only species of its genus naturally occurring in Brazil (Kuhn and Mariath 2014). The species occurs mainly in the southern region, and can also be found in Paraguay and Argentina (Carvalho 2003), where it is widely used in the furniture industry (Gonçalves et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Araucaria angustifolia grafting: techniques, environments and origin of propagation material

2016

View full text Add to dashboard Cite

SUMMARYAraucaria angustifolia (araucaria) is a remarkable species in the Mixed Ombrophilous Forest. The low germination of the stored seeds and its long reproductive cycle make grafting a good alternative for propagation, making possible to obtain genetically superior trees with early fruiting. However, araucaria grafting is still fraught with technical problems, culminating in low graft survival. With the objective to define and be able to explain the best methodology for the grafting of araucaria, we conducted studies based on five experiments evaluating the effects of: (I) environment and sex on graft survival; (II) methods of grafting and budding with shoots from stumps of stock plants; (III) techniques, indoor (nursery) and outdoor (directly in the field) grafting; (IV) budding with buds from different origins; and (V) chip budding with shoots from pruned apices of two ages stock plants. Graft survival was assessed throughout the experiments and the graft-union at the end. The use of controlled environments for grafting was favorable, especially in the glasshouse (64.1 % survival). Scions from female plants (55.5 % survival) showed higher suitability for grafting. Chip budding with shoots from pruned apices of 25 and 35-year-old stock plants showed survival of 87.5 % and 85.0 %, respectively. It is a technology that has unlimited potential for araucaria grafting, which may significantly contribute to its sustainable use.Key words: budding, Brazilian pine, clonal propagation, seed orchard, cleft graft. RESUMENAraucaria angustifolia (araucaria) es una especie que se destaca en el bosque de araucaria. La baja germinación de las semillas almacena-das y su ciclo reproductivo largo hace que la injertación se presente como una alternativa para la producción de plantas seleccionadas, genéticamente superiores y con mayor precocidad para fructificación. Sin embargo, la injertación en araucaria aún presenta problemas técnicos, culminando con una baja supervivencia de los injertos. Con el objetivo de definir y explicar el mejor método para la injertación de araucaria, se llevaron a cabo estudios basados en cinco experimentos que evaluaron el efecto de: (I) los ambientes y el sexo en la supervivencia del injerto; (II) métodos de púa en hendidura y de yema con brotes de cepa; (III) injertación directamente en campo y vivero; (IV) injerto de yemas de diferentes orígenes; (V) injerto de yemas de brotes de ápices de árboles adultos podados con dos edades. Fueron evaluadas la supervivencia de los injertos durante los experimentos y el prendimiento de los injertos al final. La utilización de ambientes protegidos para la realización de la injertación fue favorable, destacándose el invernadero de vidrio (64,1 % de prendimiento). Yemas provenientes de plantas matrices femeninas (55,5 %) mostraron mayor aptitud para la injertación. El injerto de yema en placa de brotes de ápices de árboles adultos podados, 25 y 35 años, presentó resultados de 87,5 % y 85,0 %, respectivamente. Es una tecnología que tiene gran potencial para el uso...

show abstract

“…Basing on serially sectioned biological materials, some papers have improved the visualization of fine structures by combing them with newer 3D software, as showed in the examples of Figures 1C and 1D. For instance, Kuhn & Mariath (2014) showed one of literature's first 3D reconstructions of "Brazilian pine" pollen (Araucaria angustifolia -Araucariaceae), highlighting new aspects of its reproductive morphology. Using a similar approach, Fagundes & Mariath (2014) revealed high-resolution details of the female gametophyte of a bromeliad (Billbergia nutans -Bromeliaceae).…”

Section: From Light Microscopy To X-ray Microtomography In Botanymentioning

confidence: 99%

From light microscopy to X-ray microtomography: observation and analysis technologies in transdisciplinary approaches for bionic design and botany

Palombini¹,

Cidade²,

Oliveira³

et al. 2021

Cuadernos

View full text Add to dashboard Cite

Los logros recientes en diseños bioinspirados siguen de cerca los crecientes avances en las tecnologías de observación que son esenciales para comprender una estructura o sistema biológico y adaptarlos correctamente en un proyecto. Asimismo, diferentes áreas de disciplinas clásicas, como las ciencias vegetales, incluso se están reescribiendo gracias al avance de las nuevas tecnologías. Este artículo aborda el impacto que tiene el uso de tecnologías de observación en el desarrollo de la investigación botánica de vanguardia, así como sus aplicaciones en diseños biónicos. Desde microscopía óptica (LM) hasta microtomografía de rayos X (µCT), presentamos ejemplos de cómo múltiples tecnologías están contribuyendo a innovaciones y descubrimientos más recientes en morfología y anatomía de plantas, respondiendo preguntas importantes sobre estructura / función. Se discute la evolución de las tecnologías de observación, mostrando cómo están impactando la comprensión de múltiples características de las plantas y su consiguiente adaptación y uso en proyectos bioinspirados mediante ejemplos. Esencialmente, el enfoque transdisciplinario de conectar profesionales de múltiples campos se considera fundamental para el progreso obtenido tanto en biónica como en botánica. Al incluir nuevas tecnologías de observación en su flujo de trabajo de investigación, los diseñadores y botánicos podrían beneficiarse de diferentes perspectivas en la investigación y aplicación de sus hallazgos.

show abstract

Reproductive biology of the “Brazilian pine” (Araucaria angustifolia – Araucariaceae): Development of microspores and microgametophytes

Cited by 8 publications

References 33 publications

ROOTSTOCK AGE AND GROWTH HABIT INFLUENCE TOP GRAFTING IN Araucaria angustifolia

ROOTSTOCK AGE AND GROWTH HABIT INFLUENCE TOP GRAFTING IN Araucaria angustifolia

Araucaria angustifolia grafting: techniques, environments and origin of propagation material

From light microscopy to X-ray microtomography: observation and analysis technologies in transdisciplinary approaches for bionic design and botany

Contact Info

Product

Resources

About