Nitrogen loading of Eucalyptus globulus seedlings: nutritional dynamics and influence on morphology and root growth potential

Acevedo, Manuel; Rubilar, Rafael; Dumroese, R. Kasten; Ovalle, Juan F.; Sandoval, Simón; Chassin‐Trubert, Rodrigo

doi:10.1007/s11056-020-09778-2

Cited by 10 publications

(11 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Al igual que lo observado por Monsalve et al (2009) y Acevedo et al (2020), en plantas de E. globulus fertilizadas con dosis creciente de nitrógeno, obtuvieron un número de raíces por sobre las 20 para el ensayo de potencial de crecimiento radical. En este estudio, se obtuvieron más de 40 raíces totales solo para las fertilizaciones realizadas con 300 mg L -1 de calcio.…”

Section: Concentración De Calciounclassified

Efecto de la concentración de fósforo y calcio sobre atributos morfo-fisiológicos y potencial de crecimiento radical en plantas de Aextoxicon punctatum producidas a raíz cubierta en la etapa de endurecimiento

González¹,

Ríos²,

Rojas

et al. 2020

Bosque (Valdivia)

Self Cite

View full text Add to dashboard Cite

Efecto de la concentración de fósforo y calcio sobre atributos morfo-fisiológicos y potencial de crecimiento radical en plantas de Aextoxicon punctatum producidas a raíz cubierta en la etapa de endurecimiento Effect of phosphorous and calcium concentration on morpho-physiological attributes and root growth potential of Aextoxicon punctatum plants produced by covered root during hardening stage

show abstract

Section: Concentración De Calciounclassified

Efecto de la concentración de fósforo y calcio sobre atributos morfo-fisiológicos y potencial de crecimiento radical en plantas de Aextoxicon punctatum producidas a raíz cubierta en la etapa de endurecimiento

González¹,

Ríos²,

Rojas

et al. 2020

Bosque (Valdivia)

Self Cite

View full text Add to dashboard Cite

show abstract

“…The early detection of potential nutrient depletion at the nursery level could guide the optimisation of future forest management practices and lead to a more robust approach to nutrient measurement and assessment (Garcia et al, 2018). A recent study by Acevedo et al (2020) suggests that the use of nutrient loading at the nursery level will improve seedling nutritional status, morphological attributes, and the growth of new roots. The authors suggest the need for modelling growth responses to improve their understanding of physiological processes further.…”

Section: Discussionmentioning

confidence: 99%

Detecting nutrient deficiencies in Eucalyptus grandis trees using hyperspectral remote sensing and random forest

Singh¹,

Mutanga²,

Mafongoya³

et al. 2022

SA J of Geomatics

View full text Add to dashboard Cite

Nutrient deficiencies in commercial forest trees often lead to stunted growth and reduced chances of field survival, resulting in a loss of time, productivity, and trees that can become more susceptible to a host of infections. While conventional foliar analytical methods provide accurate results, they are not time and cost-effective in a high productivity environment. This study aims to test the capability of remote sensing to detect macronutrient and micronutrient deficiencies rapidly in juvenile trees. We acquired full-waveform hyperspectral data (350nm-2500nm) from 135 young trees planted in individual pots in a controlled forestry nursery environment. We quantified nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), sodium (Na), manganese (Mn), iron (Fe), copper (Cu), zinc (Zn), and boron (B) in young commercially planted forest variety. This study identified the most critical wavebands for detecting nutrient deficiencies using built-in random forest (RF) measures of variable importance. The random forest algorithm's robustness significantly reduced the dataset's noise whilst producing promising results for certain macronutrients such as P and N (0.95 and 0.89, respectively) and micronutrients such as Mn and Cu (0.90 and 0.86, respectively). We identified the red-edge, near-infrared (NIR), visible and short-wave infrared-2 (SWIR-2) regions of the electromagnetic spectrum as the most effective regions for detecting macronutrients and micronutrients in this study. We recommend testing the use of strategic portions of the electromagnetic spectrum for reducing noise and enabling faster computing time, such as portable near-infrared technology.

show abstract

“…In this study, our results showed that interspecific rhizosphere effects significantly improved N uptake and promoted the development of E. urophylla × E. grandis , but the effect on D. odorifera in the intercropping systems was limited, possibly because the root exudates by Eucalyptus had an allelopathic effect on D. odorifera [ 37 ]. In addition, the transferred N provided key N resource for Eucalyptus and significantly improved seedling physiological performance by increasing plant growth and nutrient storage reserves for subsequent root growth [ 38 ]. Nevertheless, the limitations on the root growth of D. odorifera may have also been caused by N transfer and reduced its own N nutrients [ 3 , 15 ].…”

Section: Discussionmentioning

confidence: 99%

The physiological and molecular mechanisms of N transfer in Eucalyptus and Dalbergia odorifera intercropping systems using root proteomics

et al. 2021

View full text Add to dashboard Cite

Background The mixing of Eucalyptus with N2-fixing trees species (NFTs) is a frequently successful and sustainable cropping practice. In this study, we evaluated nitrogen (N) transfer and conducted a proteomic analysis of the seedlings of Eucalyptus urophylla × E. grandis (Eucalyptus) and an NFT, Dalbergia (D.) odorifera, from intercropping and monocropping systems to elucidate the physiological effects and molecular mechanisms of N transfer in mixed Eucalyptus and D. odorifera systems. Results N transfer occurred from D. odorifera to Eucalyptus at a rate of 14.61% in the intercropping system, which increased N uptake and growth in Eucalyptus but inhibited growth in D. odorifera. There were 285 and 288 differentially expressed proteins by greater than 1.5-fold in Eucalyptus and D. odorifera roots with intercropping vs monoculture, respectively. Introduction of D. odorifera increased the stress resistance ability of Eucalyptus, while D. odorifera stress resistance was increased by increasing levels of jasmonic acid (JA). Additionally, the differentially expressed proteins of N metabolism, such as glutamine synthetase nodule isozyme (GS), were upregulated to enhance N competition in Eucalyptus. Importantly, more proteins were involved in synthetic pathways than in metabolic pathways in Eucalyptus because of the benefit of N transfer, and the two groups of N compound transporters were found in Eucalyptus; however, more functional proteins were involved in metabolic degradation in D. odorifera; specifically, the molecular mechanism of the transfer of N from D. odorifera to Eucalyptus was explained by proteomics. Conclusions Our study suggests that N transfer occurred from D. odorifera to Eucalyptus and was affected by the variations in the differentially expressed proteins. We anticipate that these results can be verified in field experiments for the sustainable development of Eucalyptus plantations.

show abstract

Nitrogen loading of Eucalyptus globulus seedlings: nutritional dynamics and influence on morphology and root growth potential

Cited by 10 publications

References 38 publications

Efecto de la concentración de fósforo y calcio sobre atributos morfo-fisiológicos y potencial de crecimiento radical en plantas de Aextoxicon punctatum producidas a raíz cubierta en la etapa de endurecimiento

Efecto de la concentración de fósforo y calcio sobre atributos morfo-fisiológicos y potencial de crecimiento radical en plantas de Aextoxicon punctatum producidas a raíz cubierta en la etapa de endurecimiento

Detecting nutrient deficiencies in Eucalyptus grandis trees using hyperspectral remote sensing and random forest

The physiological and molecular mechanisms of N transfer in Eucalyptus and Dalbergia odorifera intercropping systems using root proteomics

Contact Info

Product

Resources

About