Interactive effects of elevated carbon dioxide and environmental stresses on root mass fraction in plants: a meta-analytical synthesis using pairwise techniques

Wang, Xianzhong; Taub, Daniel R.

doi:10.1007/s00442-010-1572-x

Cited by 54 publications

(38 citation statements)

References 80 publications

(124 reference statements)

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“…Survival strategies employed by plants include early flowering to escape drought periods, stomatal control to prevent water loss, enhanced root growth in deeper soil layers to access water [70] and reduced leaf growth to minimize the transpiring surface [71]. These adaptations come at a cost, where reductions in the growth cycle, light interception and carbon (C) assimilation by photosynthesis are often accompanied by a higher C requirement to build additional plant roots, especially under nutrient stress [72]. Thus, the trade-offs of introducing new plant traits must be considered for specific types of environmental stress [65].…”

Section: Crop Physiology and Genetics Under Climate Changementioning

confidence: 99%

Climate-smart agriculture global research agenda: scientific basis for action

et al. 2014

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Background: Climate-smart agriculture (CSA) addresses the challenge of meeting the growing demand for food, fibre and fuel, despite the changing climate and fewer opportunities for agricultural expansion on additional lands. CSA focuses on contributing to economic development, poverty reduction and food security; maintaining and enhancing the productivity and resilience of natural and agricultural ecosystem functions, thus building natural capital; and reducing trade-offs involved in meeting these goals. Current gaps in knowledge, work within CSA, and agendas for interdisciplinary research and science-based actions identified at the 2013 Global Science Conference on Climate-Smart Agriculture (Davis, CA, USA) are described here within three themes: (1) farm and food systems, (2) landscape and regional issues and (3) institutional and policy aspects. The first two themes comprise crop physiology and genetics, mitigation and adaptation for livestock and agriculture, barriers to adoption of CSA practices, climate risk management and energy and biofuels (theme 1); and modelling adaptation and uncertainty, achieving multifunctionality, food and fishery systems, forest biodiversity and ecosystem services, rural migration from climate change and metrics (theme 2). Theme 3 comprises designing research that bridges disciplines, integrating stakeholder input to directly link science, action and governance.

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Section: Crop Physiology and Genetics Under Climate Changementioning

confidence: 99%

Climate-smart agriculture global research agenda: scientific basis for action

et al. 2014

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“…Being in direct contact with the contaminated soil or soil solution, roots may be more easily affected by changes in environmental factors, such as high cadmium (Cd) concentrations (Benavides et al, 2005); under elevated levels of CO 2 , the root shows a greater size increase than leaves, stems, and reproductive structures, even though leaves are the main site of CO 2 exposure and uptake (Kimball et al, 2002;Wang and Taub, 2010). This process usually affects the efficiency of acquisition of resources (Day et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Effects of elevated CO2 levels on root morphological traits and Cd uptakes of two Lolium species under Cd stress

Jia

Tang²,

Ju³

et al. 2011

J. Zhejiang Univ. Sci. B

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This study was conducted to investigate the combined effects of elevated CO 2 levels and cadmium (Cd) on the root morphological traits and Cd accumulation in Lolium multiflorum Lam. and Lolium perenne L. exposed to two CO 2 levels (360 and 1 000 μl/L) and three Cd levels (0, 4, and 16 mg/L) under hydroponic conditions. The results show that elevated levels of CO 2 increased shoot biomass more, compared to root biomass, but decreased Cd concentrations in all plant tissues. Cd exposure caused toxicity to both Lolium species, as shown by the restrictions of the root morphological parameters including root length, surface area, volume, and tip numbers. These parameters were significantly higher under elevated levels of CO 2 than under ambient CO 2 , especially for the number of fine roots. The increases in magnitudes of those parameters triggered by elevated levels of CO 2 under Cd stress were more than those under non-Cd stress, suggesting an ameliorated Cd stress under elevated levels of CO 2 . The total Cd uptake per pot, calculated on the basis of biomass, was significantly greater under elevated levels of CO 2 than under ambient CO 2 . Ameliorated Cd toxicity, decreased Cd concentration, and altered root morphological traits in both Lolium species under elevated levels of CO 2 may have implications in food safety and phytoremediation.

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“…Plants which were not moisture stressed at e[CO 2 ] did not show the expected increase in root biomass relative to above-ground biomass (Wang and Taub, 2010).…”

Section: Wheat Productivity Response To Rising Temperatures and Moistmentioning

confidence: 99%

“…Ozone (O 3 ), another important greenhouse gas which is expected to increase into the future, is reported to induce gene transcription associated with plant defence (Donnelly et al, 2005, Wang andTaub, 2010). Ozone effects will not be discussed at length in this review.…”

Section: Response Of Plant Physiology To Increasing Comentioning

confidence: 99%

“…The main contributing factor to climate change, atmospheric [CO 2 ], increases the ability of C3 plants to fix more carbon thereby increasing carbohydrate stores, crop yield and plant biomass , Ma et al, 2005, Wang et al, 2009, Wang and Taub, 2010. This phenomenon is referred to as a "fertilisation effect" and augments photosynthetic efficiency by decreased stomatal conductance and transpiration (Abbad et al, 2004, Chakraborty and Newton, 2011, Li et al, 2000, Li et al, 2004, Wall et al, 2006.…”

Section: Response Of Plant Physiology To Increasing Comentioning

confidence: 99%

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The effect of CO2 and temperature on Fusarium crown rot incidence, severity, pathogen colonisation, toxigenic potential and host resistance in a selection of wheat germplasm

Melloy¹

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Rising atmospheric CO 2 may impact on host and pathogen interactions to the benefit or detriment of crop productivity. The wheat disease Fusarium crown rot (FCR), caused by the pathogen Fusarium pseudograminearum, is predicted to increase in incidence with rising CO 2 due to changes in wheat resistance. Fusarium spp.regularly reduce the quantity and quality of wheat yields around the globe. Reported here are a collection of studies which show FCR incidence and susceptibility in wheat plants is likely to increase in a future with higher atmospheric [CO 2 FCR resistance, susceptibility and crown rot induced crop losses through lower grain weight, were dependent on host genotype. On average genotype L2-120, 2-49, and Sunco showed the highest resistance to FCR while Tamaroi, Janz and Wyalkatchem showed the lowest resistance. Overall, increasing atmospheric [CO 2 ] is likely to lead to a greater build-up of FCR inoculum in wheat, encouraging an increased disease incidence in susceptible varieties of wheat. With greater FCR incidence and subsequent changes to toxin production is likely to boost DON in plant stems. From this research it is likely that e[CO 2 ] will lower crop productivity where FCR is present and negatively impact on the quantity and quality of future crop yields. The consequences of these changes may be mitigated through crop breeding programs with the purpose of developing wheat varieties with improved FCR resistance, FCR tolerance and the ability to detoxify DON mycotoxin.iv

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Interactive effects of elevated carbon dioxide and environmental stresses on root mass fraction in plants: a meta-analytical synthesis using pairwise techniques

Cited by 54 publications

References 80 publications

Climate-smart agriculture global research agenda: scientific basis for action

Climate-smart agriculture global research agenda: scientific basis for action

Effects of elevated CO2 levels on root morphological traits and Cd uptakes of two Lolium species under Cd stress

The effect of CO2 and temperature on Fusarium crown rot incidence, severity, pathogen colonisation, toxigenic potential and host resistance in a selection of wheat germplasm

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