Assessment of benefits and risks of growing Jatropha (Jatropha curcas) as a biofuel crop in sub-Saharan Africa: a contribution to agronomic and socio-economic policies

Kashe, Keotshephile; Kgathi, Donald L.; Murray-Hudson, Michael; Mfundisi, Kelebogile B.

doi:10.1007/s11676-017-0460-1

Cited by 12 publications

(2 citation statements)

References 114 publications

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“…It suggested Jatropha as a potential feedstock in this country [11,12]. Since then, various studies have been undertaken on the development and assessment of Jatropha bioenergy in Botswana, including cultivation management [13][14][15][16], plant physiology [17][18][19], the assessment and utilization of seed oils and non-oil biomass feedstock [20][21][22], and environmental and socio-economic impacts [12,14,23,24]. The research also revealed dozens of unique Jatropha accessions in the drought-and frost-prone regions of Botswana, among which several potentially superior genotypes with high yields, insect pest tolerance, and environmental adaptations have been nominated [13,15,25].…”

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confidence: 99%

Multivariate Analysis of Seed Chemical Diversity among Jatropha curcas in Botswana

et al. 2021

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Jatropha (Jatropha curcas L.) has been identified as a potential bioenergy feedstock in arid regions, but knowledge of the diversity of its chemical characteristics is limited. In this study, 61 Jatropha accessions growing in Botswana, where both severe drought and winter frosts frequently occur, were analyzed for their seed chemical properties. Histogram analyses and meta-analysis comparisons with seeds from other countries/continents showed that the median/mean dry seed weight, toxic compound phorbol esters, and C18:0 fatty acid levels in the Botswanan accessions were lower than those from other countries/continents. A clustered heat map analysis indicated five clades for the Botswanan accessions, and their physicochemical traits were also categorized into five groups. Many positive and negative correlations were observed among the chemical traits, including negative correlations between the C18:3 (linolenic acid) content and yield-related traits (lipid content and dry seed weight). Principal component analysis highlighted the existence of accessions with highly deviated seed chemical compositions, such as those enriched in C18:0/C18:1 and C16:0/C16:1/C18:3 fatty acids. Overall, the present study suggests considerable diversity in the seed chemical compositions of Botswanan Jatropha accessions. Various accessions could be useful as feedstock for specific industrial products, as well as for breeding materials for the fortification of specific chemical ingredients.

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Section: Introductionmentioning

confidence: 99%

Multivariate Analysis of Seed Chemical Diversity among Jatropha curcas in Botswana

et al. 2021

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“…It is also being explored for its phytoremediation potential as it has shown high tolerance towards heavy metals when grown in contaminated soils 13 . J. curcus is a stress-resistant, perennial plant, growing well in marginal or poor soil, therefore there is special interest in its cultivation in barren and arid regions 14 . The aim of the present research was to investigate the effects of heavy metals Cd and Pb on seed germination and seedling growth of J. curcas L. and determine the tolerance of this plant towards these heavy metals.…”

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Effect of Cadmium and Lead Stress on Seed Germination and Seedling Growth of Jatropha curcas L.

Shourie

2022

Biosci., Biotech. Res. Asia

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Heavy metal pollution in the biosphere has become a worldwide problem. Metal industry effluents, mining sites, municipal and agricultural waste are important sources of metal dispersion in environment. Heavy metal imposed phytotoxicity affects seed germination, seedling growth, photosynthesis and other physiological processes. Exposure of seeds to cadmium (Cd) and lead (Pb) has deleterious effects resulting into inhibition of germination, delayed germination time and retardation of seedling growth due to toxicity. The aim of this research is to investigate the toxic effects of Cd and Pb on seed germination and seedling growth of Jatropha curcas L. and evaluate its tolerance for heavy metal stress. The experimental treatments included exposure to five concentrations of cadmium nitrate and lead acetate (ranging from 25 to 125 µM/L), under which the germination and seedling growth parameters were determined periodically. The germination and growth of J. curcas L. was affected by cadmium and lead supplemented at different concentrations and the toxicity effects were found to be concentration dependent. Tolerance indices declined sharply with increasing concentrations of lead and cadmium treatments. Germination was inhibited upto 50% by 100 μmol/L of Cd, 125 μmol/L of Pb. Mean germination time and seedling vigour index also gradually decreased with increase in Cd and Pb concentration. Cadmium proved to be more toxic than lead in all considerations.

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Leaf phenotypic variation of endangered plant Tetracentron sinense Oliv. and influence of geographical and climatic factors

et al. 2020

J. For. Res.

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Assessment of benefits and risks of growing Jatropha (Jatropha curcas) as a biofuel crop in sub-Saharan Africa: a contribution to agronomic and socio-economic policies

Cited by 12 publications

References 114 publications

Multivariate Analysis of Seed Chemical Diversity among Jatropha curcas in Botswana

Multivariate Analysis of Seed Chemical Diversity among Jatropha curcas in Botswana

Effect of Cadmium and Lead Stress on Seed Germination and Seedling Growth of Jatropha curcas L.

Leaf phenotypic variation of endangered plant Tetracentron sinense Oliv. and influence of geographical and climatic factors

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