Models for estimating yacon leaf area

Erlacher, Wellington Abeldt; Oliveira, Fábio Luiz de; Fialho, Gustavo Sessa; Silva, Diego Mathias Natal da; Carvalho, Arnaldo Henrique de Oliveira

doi:10.1590/s0102-05362016003019

Cited by 12 publications

(11 citation statements)

References 14 publications

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“…H. Rob. (Erlacher, Oliveira, Fialho, Silva, & Carvalho, 2016), Macadamia integrifolia Maiden & Betche (Schmildt et al, 2016b) and Litchi chinensis Sonn. (Oliveira et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

Leaf area estimation for Psychotria carthagenensis and Psychotria hoffmannseggiana as a function of linear leaf dimensions

Ribeiro¹,

Coêlho

Figueiredo

et al. 2019

Acta Sci. Biol. Sci.

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Determining leaf area is important for studies involving plant growth and development. The aim of the present study was to obtain models for estimating leaf area of Psychotria carthagenensis and Psychotria hoffmannseggiana using linear measurements of leaf blades (length and width). Two hundred leaf blades of each species were collected in Parque Estadual Mata do Pau-Ferro in the municipality of Areia, Paraíba, Northeast Brazil. The equations evaluated for producing potential models included the following: linear, quadratic, potential and exponential. The criteria used to determine the best model(s) were as follows: high coefficient of determination (R²), low root-mean-square error (RMSE), low Akaike information criterion (AIC), high Willmott concordance index (d) and a BIAS ratio close to zero. All evaluated models satisfactorily estimated leaf area for the two species, but the equation ŷ = 0.6373 * LW 0.9804 was the most appropriate for P. carthagenensis, while ŷ = 0.6235 * LW 0.9712 was the most appropriate for P. hoffmannseggiana.

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“…H. Rob. (Erlacher, Oliveira, Fialho, Silva, & Carvalho, 2016), Macadamia integrifolia Maiden & Betche (Schmildt et al, 2016b) and Litchi chinensis Sonn. (Oliveira et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

Leaf area estimation for Psychotria carthagenensis and Psychotria hoffmannseggiana as a function of linear leaf dimensions

Ribeiro¹,

Coêlho

Figueiredo

et al. 2019

Acta Sci. Biol. Sci.

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“…The leaf length was measured with a meter rule in centimeters along the midrib, from the base to apex excluding the petiole and leaf width in centimeters was measured perpendicular to the midrib from one end of the leaf to the other. The readings obtained were then used to estimate the leaf area by applying [7] equation. Where, L is the leaf length and W is the width.…”

Section: Plant Growth Parameters Determinationmentioning

confidence: 99%

Limitation on Growth and Yield of Phaseolus vulgaris L. Due to Telfairia Mosaic Virus

Mofunanya

Effa

Ngele

et al. 2021

APRJ

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Aims: To assess limitation on growth and yield of P. vulgaris due to Telfairia mosaic virus (TeMV). Study Design: The study was conducted in a randomized block design. Place and Duration: Department of Botany, University of Calabar, Calabar, Nigeria between April and August, 2016. Methodology: Seeds of P. vulgaris were obtained, sorted, planted in polyethylene bags, and on germination, inoculated with TeMV, growth and yield limitation assessed at 2, 4, 6, 8 and 12 weeks after inoculation. Results: Results showed that the virus decreased growth of P. vulgaris resulting in yield loses. Growth parameters were severely limited by TeMV with percentage reduction in Leaf area, shoot height, number of primary shoot, petiole length and number of leaves produced of 44.5%, 52.8%, 44.0%, 44.9% and 51.45 respectively at 10 weeks after inoculation (WAI). Leaf fresh weight (38.4%) and dry weight (32.3%) were significantly (P=0.05) reduced. Relative growth rate, net assimilation rate and leaf area ratio were negatively impacted by the virus with reductions of 26.5%, 36.7% at 4 WAI and 33.5% at 12 WAI respectively. Limitation on yield due to TeMV was significant (P=0.05) with reduction in pod length of 36.9%, number of pods per plant of 36.5%, number of seeds per pod of 26.5%, number of seeds per plant of 53.3% and weight of 100 seeds of 18.5%. Limitation induced on fresh and dry weight of shoot and root, pod width, seed length and seed width was not significant. Conclusion: The study confirmed the threat of TeMV necessitating control of the virus on this important legume.

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“…The leaf area was estimated according to the model of indirect determination (AF CL = (-27.7418 + (3.9812CL/ln CL) proposed by Erlacher et al (2016) by measuring the width and length of each leaf. The diameter of the shoots was measured using a digital caliper.…”

Section: Development Of Greenhouse Seedlingsmentioning

confidence: 99%

Yacon potato propagation from herbaceous cuttings with different numbers of buds

Pedrosa

Oliveira

Zucoloto

et al. 2020

IJANR

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R. A. de-Sales, and A.H. de Oliveira-Carvalho. 2020. Yacon potato propagation from herbaceous cuttings with different numbers of buds. Int. J. Agric. Nat. Resour. The objective of this study was to evaluate yacon potato propagation from herbaceous cuttings with different numbers of buds. Therefore, an experiment was carried out in two phases. The first phase was carried out in a greenhouse with seedlings using a randomized complete block design with 40 replicates. The treatments consisted of varying the number of buds per cutting: two buds (T1), three buds (T2), or four buds (T3). The second phase was carried out in the field following a randomized complete block design with 4 replicates, and the treatments were the same as those used in the seedling phase. The following morphological characteristics were evaluated: number of leaves per plant, leaf area, plant height, stem diameter, number of stems per plant, leaf dry mass, stems, rhizophores, tuberous roots, and tuberous root yield. The physiological characteristics evaluated were the relative chlorophyll content (FCI-Falker chlorophyll index), net CO 2 assimilation rate, leaf transpiration, stomatal conductance, internal CO 2 concentration, water use efficiency and instantaneous carboxylation efficiency. It was observed that the seedlings from cuttings with 3 buds presented higher stomatal conductance (g s), which reflected their higher transpiration rates. The yacon potato presented the best vegetative and productive development when propagated by herbaceous cuttings with three buds.

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Models for estimating yacon leaf area

Cited by 12 publications

References 14 publications

Leaf area estimation for <i>Psychotria carthagenensis</i> and <i>Psychotria hoffmannseggiana</i> as a function of linear leaf dimensions

Leaf area estimation for <i>Psychotria carthagenensis</i> and <i>Psychotria hoffmannseggiana</i> as a function of linear leaf dimensions

Limitation on Growth and Yield of Phaseolus vulgaris L. Due to Telfairia Mosaic Virus

Yacon potato propagation from herbaceous cuttings with different numbers of buds

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