Latex Harvesting Technologies Adapted to Clones IRCA18, IRCA 111, IRCA 130, PB 235 and PB 260 of Hevea brasiliensis (Rubber Tree) of the Class to Active Metabolism in South-Western Côte d’Ivoire

Obouayeba, Samuel; Diarrassouba, M.; Soumahin, Eric Francis; Essehi, Jean Lopez; Okoma, M; Adou, C; Obouayeba, Abba P.

doi:10.9734/jaeri/2016/27181

Cited by 4 publications

(11 citation statements)

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“…This is a good indication that early ie., 6, 7, 8 and 9 years (A to H) upward tapping was not detrimental to the vegetative radial growth of the clone GT 1. Work of Nair [3] and Obouayeba et al [4] had also proven that the upward tapping from the 6 th year (A and B) was the best time of upward tapping of clone GT 1 and probably other clones with moderate metabolism.…”

Section: Radial Vegetative Growthmentioning

confidence: 91%

“…It also induces rubber production in upward tapping [2,23], and depends on the strength of stimulant (2.5% ET in downward vs 5% ET in upward) which may ultimately effected by the activation of the latex generation metabolism and availability of raw material (sucrose) [24]. This assertion is supported by the work of Obouayeba et al, [4,23]. The improvement of the production by the upward tapping was demonstrated by earlier studies [23] and [25].…”

Section: Dry Rubber Productionmentioning

confidence: 96%

“…Rubber yield under each treatment was weighed every 4 weeks using a scale [4]. Samples of fresh rubber were collected for each treatment to determine the Coefficient of Transformation (CT), which is the percentage of dry matter in a given rubber sample, which was used to calculate the production of dry rubber expressed in grams per tree per tapping (g t -1 t -1 ) and in kilograms per hectare per year (kg ha -1 y -1 ).…”

Section: Measurement Of Rubber Yieldmentioning

confidence: 99%

“…However, the rubber productivity performance of upward tapping is well known and upward tapping is much more productive with an output at least 25% higher than downward tapping [2]. The perspective of reducing the downward tapping is conceivable and downward tapping for four years was sufficient to practice upward tapping from the 5 th year the onwards [3,4]. However, the study indicated that the tapping treatment of four of downward half-spiral followed by upward half-spiral showed a high rate of TPD.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of Productivity of the Moderate Metabolism Clone GT 1 of Hevea Brasiliensis Muell. Arg. by Early Upward Tapping in Côte d'Ivoire

Obouayeba¹,

Francis²,

Lacote³

et al. 2021

AJBIO

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The quest for greater return on investment at short time is a recurring concern of the rubber industry. Early reverse tapping could be an option to this concern. It is therefore to verify this hypothesis that five different stages of initiation of upward tapping, 6 th , 7 th , 8 th , 9 th year and the control in 10 th year, with application of 2.5 and 5% ethephon was conducted for eight years in the South-East (Bettié) and the Centre-West (Gagnoa) of Côte d'Ivoire. Irrespective of the ethephon concentration used, average yield obtained from upward tapping at 6 th year was 3012 ± 516 kg ha -1 y -1 against 2528 kg ha -1 y -1 in the control, where controlled upward tapping started at 10 th year with a productivity gain of 19%. The mean annual increase in circumference in the upward tapped trees at 6 th year, was 3.02 ± 0.18 cm y -1 and statistically higher than that of the control treatment (2.40 cm y -1 ). Physiological profiles improved during the experiment, regardless of site and of periods of upward tapping. Generally, the sensitivity to panel dryness in the control is more pronounced than that of early upward tapping. Our results suggest very early upward tapping at 6 th year after the 5 years of downward tapping, is the best period to harvest latex from the high tapping panel.

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Section: Radial Vegetative Growthmentioning

confidence: 91%

Section: Dry Rubber Productionmentioning

confidence: 96%

Section: Measurement Of Rubber Yieldmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improvement of Productivity of the Moderate Metabolism Clone GT 1 of Hevea Brasiliensis Muell. Arg. by Early Upward Tapping in Côte d'Ivoire

Obouayeba¹,

Francis²,

Lacote³

et al. 2021

AJBIO

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“…This result is in agreement with the work of Ologundudu et al, (2010) who identified delphinidin-3-monoglucoside, cyaniding-3-monoglucoside and petunidin-3-monoglucoside as the predominant anthocyanins in H. sabdariffa calyces. Obouayeba et al, (2015) who did phytochemical characterisation and antioxidant activity analysis of Hibiscus sabdariffa (Malvaceae) calyx extracts also identified delphinidin 3-Oglucoside and cyanidin 3-O-glucoside as the major anthocyanins in Hibiscus sabdariffa (Malvaceae) calyx. In addition, Abeda et al, (2015) revealed that cyanidin-3-O-sambubioside is the predominant anthocyanin in Hibiscus sabdariffa callus.…”

Section: Resultsmentioning

confidence: 99%

Effects of <i>Hibiscus Sabdarrifa L.</i> anthocyanins on cadmium-induced oxidative stress in Wistar rats

Orororo¹,

Asagba²,

Tonukari³

et al. 2018

Journal of Applied Sciences and Environmental Management

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ABSTRACT:The search for potential ameliorative substances of Cadmium (Cd) toxicity is ongoing. Thus, this study was aimed at investigating the effects of Hibiscus Sabdarrifa L. anthocyanins (HSA) on Cd-induced oxidative stress in wistar rats. Anthocyanins were extracted from H. sabdariffa calyces using standard protocols and were identified with a Agilent HPLC system (model-LC 1100 series).Thirty wistar rats (185±5.2g) divided into Five (5) groups and were treated for fifteen days: Group 1: control, Group 2: Cd alone, 3mg/kg b wt, Group 3: HSA alone, 3mg/kg b wt, Group 4: HSA Pre-Cd -HSA (3g/ kg b wt for ten consecutive days) and Cd (3mg/ kg b wt) for the remaining five days, Group 5: HSA Post-Cd -Cd (3mg/kg b wt) for the first five consecutive days then HSA (3g/ kg b wt) for the remaining ten days. Comparison of HPLC chromatogram of anthocyanin extract of H. sabdariffa calyces with published data revealed the presence of malvidin-3-O-glucoside, delphinidin-3-monoglucoside, cyanidin-3-monoglucoside and petunidin-3-monoglucoside. Exposure to Cd significantly reduced (p<0.05) GSH levels and glutathione-s-transferase activity but significantly (P<0.05) increased lipid peroxidation in the plasma and tissues of rats. Cd-exposure also caused a significant decrease (p<0.05) in tissue SOD and CAT, but pre-treatment and post-treatment with HSA improved tissue SOD, CAT and GST activitieswith concomitant increase in GSH levels and reduction in tissue lipid peroxidation. This confirms the antioxidant capacity of H. sabdariffa anthocyanins in ameliorating Cd-induced oxidative stress when administered pre and post Cd exposure.

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A Meta-Analysis of Latex Physiology Studies Reveals Limited Adoption and Difficulties to Interpret Some Latex Diagnosis Parameters in Hevea brasiliensis

Junaidi¹,

Clément‐Vidal

Nuringtyas

et al. 2022

HAYATI J Biosci

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Latex diagnosis is widely adopted in natural rubber-producing countries to optimize the natural rubber production through a physiological-based latex-harvesting system management. This study is the first bibliographical searching and meta-analysis on the variation of latex physiological parameters i.e. sucrose, inorganic phosphorus, thiols, and total solid content. The study used information extracted from 158 scientific papers. Descriptive statistics, agglomerative hierarchical clustering, and principal component analysis were performed to characterize applications of latex diagnosis, how often parameters are used and interpreted as well as the variation of its parameter values. From 158 papers, latex diagnosis parameters were used in 114 agronomy, 22 in physiology, and 22 in breeding papers. The agglomerative hierarchical clustering analysis indicated that sucrose and inorganic phosphorus contents were clustered together and total solid and thiols contents were located in another cluster. The average values of the total solid content, sucrose, inorganic phosphorus and thiols were 43.9%, 9.4 mM, 16.5 mM, and 0.52 mM, respectively. The percentage of interpretation is 63.3% for sucrose, 54.4% for inorganic phosphorus, 47.5% for thiols, and 41.1% for the total solid content. The low interpretation of thiols and total solid contents question their relevance in latex diagnosis. The low adoption of latex diagnosis in breeding could hinder the selection of activities leads to a limitation of selection for long-term high yielding and stress-adapted clones.

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Latex Harvesting Technologies Adapted to Clones IRCA18, IRCA 111, IRCA 130, PB 235 and PB 260 of Hevea brasiliensis (Rubber Tree) of the Class to Active Metabolism in South-Western Côte d’Ivoire

Cited by 4 publications

References 0 publications

Improvement of Productivity of the Moderate Metabolism Clone GT 1 of Hevea Brasiliensis Muell. Arg. by Early Upward Tapping in Côte d'Ivoire

Improvement of Productivity of the Moderate Metabolism Clone GT 1 of Hevea Brasiliensis Muell. Arg. by Early Upward Tapping in Côte d'Ivoire

Effects of <i>Hibiscus Sabdarrifa L.</i> anthocyanins on cadmium-induced oxidative stress in Wistar rats

A Meta-Analysis of Latex Physiology Studies Reveals Limited Adoption and Difficulties to Interpret Some Latex Diagnosis Parameters in Hevea brasiliensis

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Latex Harvesting Technologies Adapted to Clones IRCA18, IRCA 111, IRCA 130, PB 235 and PB 260 of Hevea brasiliensis (Rubber Tree) of the Class to Active Metabolism in South-Western Côte d’Ivoire

Cited by 4 publications

References 0 publications

Improvement of Productivity of the Moderate Metabolism Clone GT 1 of Hevea Brasiliensis Muell. Arg. by Early Upward Tapping in Côte d&apos;Ivoire

Improvement of Productivity of the Moderate Metabolism Clone GT 1 of Hevea Brasiliensis Muell. Arg. by Early Upward Tapping in Côte d&apos;Ivoire

Effects of <i>Hibiscus Sabdarrifa L.</i> anthocyanins on cadmium-induced oxidative stress in Wistar rats

A Meta-Analysis of Latex Physiology Studies Reveals Limited Adoption and Difficulties to Interpret Some Latex Diagnosis Parameters in Hevea brasiliensis

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Product

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Improvement of Productivity of the Moderate Metabolism Clone GT 1 of Hevea Brasiliensis Muell. Arg. by Early Upward Tapping in Côte d'Ivoire

Improvement of Productivity of the Moderate Metabolism Clone GT 1 of Hevea Brasiliensis Muell. Arg. by Early Upward Tapping in Côte d'Ivoire