Leaf Gas Exchange, Dry Matter Partitioning, and Mineral Element Concentrations in Mango as Influenced by Elevated Atmospheric Carbon Dioxide and Root Restriction

Schaffer, Bruce; Whiley, A. W.; Searle, C.; Nissen, Robert J.

doi:10.21273/jashs.122.6.849

Cited by 34 publications

(22 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our study the C and Ca increased and the N, Mg and Fe among micronutrients declined in both the vegetables under ECO 2 . A reduction in plant nutrient concentration is often found at ECO 2 (Schaffer et al 1997). In our study Ca concentration increased in the leaves of both the vegetables.…”

Section: ⎯⎯⎯⎯supporting

confidence: 59%

Photosynthesis and nutrient composition of spinach and fenugreek grown under elevated carbon dioxide concentration

Jain¹,

Pal²,

Raj³

et al. 2007

Biol. plant.

View full text Add to dashboard Cite

The effect of elevated carbon dioxide concentration on the changes in the biomass, photosynthesis and nutrient composition was investigated in two leafy vegetables. Spinach (Spinacia oleracea L.) and fenugreek (Trigonella foenum-graecum L.) plants were grown in open top chambers under either ambient (ACO 2 , 350 ± 50 µmol mol -1 ) or elevated (ECO 2 , 600 ± 50 µmol mol -1 ) CO 2 concentration and analyzed 40, 60 and 80 days after exposure. The plants grown in ECO 2 had higher net photosynthetic rate and lower stomatal conductance when compared with the plants grown in ACO 2 . ECO 2 also changed the nutrient composition: a lower N, Mg and Fe contents and higher C and Ca contents were observed in the leaves of plants exposed to ECO 2 than in those grown at ACO 2 .

show abstract

Section: ⎯⎯⎯⎯supporting

confidence: 59%

Photosynthesis and nutrient composition of spinach and fenugreek grown under elevated carbon dioxide concentration

Jain¹,

Pal²,

Raj³

et al. 2007

Biol. plant.

View full text Add to dashboard Cite

show abstract

“…However, the growth enhancement appeared to be smaller in older trees compared to young trees or seedlings (Baligar et al 2005;Lahive 2015;Lahive et al 2018). Similarly, mango trees grown at 700 ppm accumulated more dry matter and a larger leaf area than those grown at ambient CO 2 (Schaffer et al 1997). Photosynthesis in coffee does not appear to acclimate to elevated CO 2 in long-term growth studies; after 2-year growth at ca.…”

Section: Carbon Dioxidementioning

confidence: 88%

“…600 ppm, a 40% increase in photosynthetic rate was measured which was still apparent 2 years later (Ghini et al 2015;Rakocevic et al 2018). Nutrient uptake and nutrient use efficiency for several mineral nutrients including N were improved by growth at elevated CO 2 (Baligar et al 2005) while no such change in nutrient concentrations was seen in coffee plants grown at elevated CO 2 (Da Matta et al 2016), and in mango, the concentration of several minerals decreased in leaves grown at elevated CO 2 relative to ambient CO 2 (Schaffer et al 1997). In general, in C 3 plants, increases in CO 2 concentration cause a decline in g s (Ainsworth and Rogers 2007) and in some cases a reduction in stomatal density (Woodward 1987).…”

Section: Carbon Dioxidementioning

confidence: 97%

The physiological responses of cacao to the environment and the implications for climate change resilience. A review

Lahive

Hadley

Daymond

2018

Agron. Sustain. Dev.

145

109

View full text Add to dashboard Cite

Cacao (Theobroma cacao L.) is a tropical perennial crop which is of great economic importance to the confectionary industry and to the economies of many countries of the humid tropics where it is grown. Some recent studies have suggested that climate change could severely impact cacao production in West Africa. It is essential to incorporate our understanding of the physiology and genetic variation within cacao germplasm when discussing the implications of climate change on cacao productivity and developing strategies for climate resilience in cacao production. Here, we review the current research on the physiological responses of cacao to various climate factors. Our main findings are as follows: (1) water limitation causes significant yield reduction in cacao, but genotypic variation in sensitivity is evident; (2) in the field, cacao experiences higher temperatures than is often reported in the literature; (3) the complexity of the cacao/shade tree interaction can lead to contradictory results; (4) elevated CO 2 may alleviate some negative effects of climate change; (5) implementation of mitigation strategies can help reduce environmental stress; and (6) significant gaps in the research need addressing to accelerate the development of climate resilience. Harnessing the significant genetic variation apparent within cacao germplasm is essential to develop modern varieties capable of high yields in non-optimal conditions. Mitigation strategies will also be essential, but to use shading to best effect shade tree selection is crucial to avoid resource competition. Cacao is often described as being sensitive to climate change, but genetic variation, adaptive responses, appropriate mitigation strategies and interactive climate effects should all be considered when predicting the future of cacao production. Incorporating these physiological responses to various environmental conditions and developing a deeper understanding of the processes underlying these responses will help to accelerate the development of a more resource use efficient tree ensuring sustainable production into the future.

show abstract

“…Global climate change induced by anthropogenic release of CO 2 is perceived by some as one of the greatest environmental challenges the world faces today. Although scientific evidence suggests some positive effects of increased atmospheric CO 2 such as improved plant productivity (Schaffer et al, 1997;Pan et al, 1998;Centritto et al, 1999a, b;Idso and Kimball, 2001;Keutgen and Chen, 2001), negative changes in the global climate (rising temperatures, higher frequency of droughts and floods) are often the most consequential processes associated with increased concentration of CO 2 in the atmosphere (USDA NRC, 2000;IPCC, 2001). High resolution modeling studies suggest that peak wind and precipitation intensity of tropical cyclones are likely to increase over some areas due to an increase in CO 2 emissions (Fan et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Impact of Human Activities on Carbon Dioxide (CO2) Emissions: A Statistical Analysis

Salam

Noguchi

2005

Environmentalist

View full text Add to dashboard Cite

The balance of evidence suggests a perceptible human influence on global ecosystems. Human activities are affecting the global ecosystem, some directly and some indirectly. If researchers could clarify the extent to which specific human activities affect global ecosystems, they would be in a much better position to suggest strategies for mitigating against the worst disturbances. Sophisticated statistical analysis can help in interpreting the influence of specific human activities on global ecosystems more carefully. This study aims at identifying significant or influential human activities (i.e. factors) on CO 2 emissions using statistical analyses. The study was conducted for two cases: (i) developed countries and (ii) developing countries. In developed countries, this study identified three influential human activities for CO 2 emissions: (i) combustion of fossil fuels, (ii) population pressure on natural and terrestrial ecosystems, and (iii) land use change. In developing countries, the significant human activities causing an upsurge of CO 2 emissions are: (i) combustion of fossil fuels, (ii) terrestrial ecosystem strength and (iii) land use change. Among these factors, combustion of fossil fuels is the most influential human activity for CO 2 emissions both in developed and developing countries. Regression analysis based on the factor scores indicated that combustion of fossil fuels has significant positive influence on CO 2 emissions in both developed and developing countries. Terrestrial ecosystem strength has a significant negative influence on CO 2 emissions. Land use change and CO 2 emissions are positively related, although regression analysis showed that the influence of land use change on CO 2 emissions was still insignificant. It is anticipated, from the findings of this study, that CO 2 emissions can be reduced by reducing fossil-fuel consumption and switching to alternative energy sources, preserving exiting forests, planting trees on abandoned and degraded forest lands, or by planting trees by social/agroforestry on agricultural lands.

show abstract

Leaf Gas Exchange, Dry Matter Partitioning, and Mineral Element Concentrations in Mango as Influenced by Elevated Atmospheric Carbon Dioxide and Root Restriction

Cited by 34 publications

References 0 publications

Photosynthesis and nutrient composition of spinach and fenugreek grown under elevated carbon dioxide concentration

Photosynthesis and nutrient composition of spinach and fenugreek grown under elevated carbon dioxide concentration

The physiological responses of cacao to the environment and the implications for climate change resilience. A review

Impact of Human Activities on Carbon Dioxide (CO2) Emissions: A Statistical Analysis

Contact Info

Product

Resources

About