Interaction between flowering pattern and latex yield in Hevea brasiliensis Muell. Arg.

Omokhafe, K.O.

doi:10.12702/1984-7033.v04n03a03

Cited by 8 publications

(6 citation statements)

References 5 publications

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“…As an alternative, metadata gathered from studies that report both refoliation dates and the corresponding geographical coordinates from different locations should serve as an alternative for producing a time map for refoliation. The existing literature which report both refoliation dates and coordinates [58][59][60][61][62][63][64][65][66][67] are not abundant enough and the indicated refoliation dates are often formulated in too much a loose range to be applicable to our purpose. As a result, the map which summarizes the situation over the refoliation period (Figure 2b) inevitably suffers from overgeneralization of the time frame.…”

Section: Discussionmentioning

confidence: 99%

Global Assessment of Climate-Driven Susceptibility to South American Leaf Blight of Rubber Using Emerging Hot Spot Analysis and Gridded Historical Daily Data

Golbon

Cotter

Mahbod

et al. 2019

Forests

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South American leaf blight (SALB) of Para rubber trees (Hevea brasiliensis Muell. Arg.) is a serious fungal disease that hinders rubber production in the Americas and raises concerns over the future of rubber cultivation in Asia and Africa. The existing evidence of the influence of weather conditions on SALB outbreaks in Brazil has motivated a number of assessment studies seeking to produce risk maps that illustrate this relationship. Subjects with dynamic and cyclical spatiotemporal features need to embody sufficiently fine spatial resolution and temporal granulation for both input data and outputs in order to be able to reveal the desired patterns. Here, we apply emerging hot spot analysis to three decades of gridded daily precipitation and surface relative humidity data to depict their temporal and geographical patterns in relation to the occurrence of weather conditions that may lead to the emergence of SALB. Inferential improvements through improved handling of the uncertainties and fine-scaled temporal breakdown of the analysis have been achieved in this study. We have overlaid maps of the potential distribution of rubber plantations with the resulting dynamic and static maps of the SALB hot spot analysis to highlight regions of distinctly high and low climatic susceptibility for the emergence of SALB. Our findings highlight the extent of low-risk areas that exist within the rubber growing areas outside of the 10° equatorial belt.

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Section: Discussionmentioning

confidence: 99%

Global Assessment of Climate-Driven Susceptibility to South American Leaf Blight of Rubber Using Emerging Hot Spot Analysis and Gridded Historical Daily Data

Golbon

Cotter

Mahbod

et al. 2019

Forests

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“…Yields range from 24-32 g-fresh latex per tree/tapping in Nigeria [34] to 75-120 g-fresh latex per tree/tapping in Thailand [35]. Interviews with farmers and researchers indicate that latex yield in Indonesia varies between 25 and 110 g-fresh latex per tree/tapping, amounting to an annual yield of 4-6 tonnes-fresh latex per hectare for plantations and 3 tonnes-fresh latex per hectare for agroforests.…”

Section: Latex Yield and Propertiesmentioning

confidence: 99%

“…This is followed by fruit formation; each rubber fruit contains 3-4 seeds. After 4-5 months, the fruits will dehiscence and the seeds inside will fall to the ground and are available for collection [34,53]. The annual yield of rubber seeds can vary between 300 and 2060 kg/ha [6,26].…”

Section: Seedmentioning

confidence: 99%

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Valorisation of Proteins from Rubber Tree

WIDYARANI

Coulen

Sanders

et al. 2016

Waste Biomass Valor

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Purpose The objective of this study was to identify the availability, possible applications, and economic potential of proteins that are present in different parts of the rubber tree. Proteins from non-food sources can be used in e.g. animal feed or biochemicals production with no or little competition with food production, rendering them important biobased feedstock. Rubber tree is primarily grown for its latex that is used in rubber production. Indonesia has the largest rubber plantation area that is mostly owned and run by smallholder farmers. Using non-latex fractions from the rubber tree may generate additional income, and increase the economics of rubber plantations in general. Methods Several biomass streams from the rubber tree and subsequent latex processing were considered. Data were compiled from literature, a case study, and interviews with researchers, smallholder farmers, and managers at rubber processing plant and plantation. Results Latex waste streams, seeds, and leaves were considered to have the highest potential based on the amount of available proteins, and processes to isolate proteins from these streams were proposed. Isolation of specific functional properties from natural sources requires complex (and expensive) separation processes and therefore only economically feasible when specific use of the protein(s) for high value applications can be identified. Purification of many interesting proteins from latex fractions has already been described. Processing of seeds and leaves may also yield useful proteins for food, other purposes, and also still unknown high value applications. Conclusions A biorefinery concept can be applied to obtain multiple products from the seeds and leaves, and protein extraction can be performed with available knowledge and technology. Small scale processing can be more beneficial for the farmers, especially if the products are used locally for feed.

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“…6 Since, the literature on the effects of genotype -environment compatibility and stability are low in Rosa damascena, inevitably, should refer to the methods used in similar plants. Eberhart & Russell 1 model has widely used for evaluating of yield stability in both annual and perennial plants same as Campanula rapunculoides, 7 Hevea brasiliensis 8,9 and Thea sp 10 Eberhart & Russell 1 considered a stable genotype to have a slope (b value) equal to unity and deviation from regression (S 2 d ) equal to zero. Freeman 11 and Bernardo 12 described the Eberhart & Russell 1 model as the most widely used methods for evaluating of yield stability among main classical parametric methods that determine general and specific dynamic stability (adaptability) and measures linear and nonlinear components of stability.…”

Section: Introductionmentioning

confidence: 99%

Essential oil yield and stability of various Rosa damascena Mill Landraces under different ecological conditions

Yousefi¹,

Aghdaei²

2018

HIJ

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Essential oil (EO) production is the main objective of Damask rose cultivation but its stability at different environments has not been well documented. In order to this, 35 landraces of Damask rose were studied at 7 locations in Iran during 2007-8. The analysis of variance revealed significant differences (p≤0.01) in EO among landraces (G), locations (L), Years (Y/L) and for landrace×location (GL) interaction. A large portion of EO variation was attributed to environment (Location-year) and landrace×environment (GE) effects. The GL interaction was mainly crossover and mainly accounted for by non-linear (unpredictable) component. The total mean of EO was 286ppm and Kashan with 681 ppm and the landraces of SM2, SM1, AK1 and BA1 with 547, 442, 440 and 427 ppm respectively produced the highest oil among studied locations and landraces. According to the results, most of landraces that originated from warm temperate and arid regions produced higher EO than those from cool, semi-arid and humid regions. There was high consistency of stable genotypes with two stability models of Eberhart & Russell 1 and Shukla's 2 stability variance (σi 2) and according to them the landraces of CM1, QM1, KZ1, KS1 and HO1 were general stable with dynamic stability concept. In addition, we recommend the landrace of CM1 as moderate essential oil with general stability and adaptability in different environments and locations, furthermore, SM1 and BA1 can be recommended as superior essential oil with specific adaptability for warm and arid of the southern part (Khuzestan, etc.) and SM2 and AK1 for temperate and cool areas of the northern half (Isfahan, Khorasan etc.) in Iran.

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Interaction between flowering pattern and latex yield in Hevea brasiliensis Muell. Arg.

Cited by 8 publications

References 5 publications

Global Assessment of Climate-Driven Susceptibility to South American Leaf Blight of Rubber Using Emerging Hot Spot Analysis and Gridded Historical Daily Data

Global Assessment of Climate-Driven Susceptibility to South American Leaf Blight of Rubber Using Emerging Hot Spot Analysis and Gridded Historical Daily Data

Valorisation of Proteins from Rubber Tree

Essential oil yield and stability of various Rosa damascena Mill Landraces under different ecological conditions

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