Foreword: Understanding how plants cope with acid soils

Feng, Jian; Ryan, Peter R.

doi:10.1071/fpv37n4_fo

Cited by 24 publications

(9 citation statements)

References 32 publications

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“…The quest should continue for rapid and costeffective analytical methodologies for both laboratory and field situations. Analytical technologies have recently emerged that extend the nature of data generated beyond that provided by conventional dry combustion analyses including: laser-induced spectroscopy (Herrmann et al 2005;Bai and Houlton 2009), inelastic neutron scattering (Rawluk et al 2001;Li et al 2005), and near-and mid-infrared spectroscopies (Gerber et al 2010;Ma and Ryan 2010). Research should be directed towards the possible extension of these technologies to field-based approaches capable of accounting for spatial variability.…”

Section: Modelled Valuesmentioning

confidence: 99%

Soils and climate change: potential impacts on carbon stocks and greenhouse gas emissions, and future research for Australian agriculture

et al. 2012

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Organic carbon and nitrogen found in soils are subject to a range of biological processes capable of generating or consuming greenhouse gases (CO2, N2O and CH4). In response to the strong impact that agricultural management can have on the amount of organic carbon and nitrogen stored in soil and their rates of biological cycling, soils have the potential to reduce or enhance concentrations of greenhouse gases in the atmosphere. Concern also exists over the potential positive feedback that a changing climate may have on rates of greenhouse gas emission from soil. Climate projections for most of the agricultural regions of Australia suggest a warmer and drier future with greater extremes relative to current climate. Since emissions of greenhouse gases from soil derive from biological processes that are sensitive to soil temperature and water content, climate change may impact significantly on future emissions. In this paper, the potential effects of climate change and options for adaptation and mitigations will be considered, followed by an assessment of future research requirements. The paper concludes by suggesting that the diversity of climate, soil types, and agricultural practices in place across Australia will make it difficult to define generic scenarios for greenhouse gas emissions. Development of a robust modelling capability will be required to construct regional and national emission assessments and to define the potential outcomes of on-farm management decisions and policy decisions. This model development will require comprehensive field datasets to calibrate the models and validate model outputs. Additionally, improved spatial layers of model input variables collected on a regular basis will be required to optimise accounting at regional to national scales.

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Section: Modelled Valuesmentioning

confidence: 99%

Soils and climate change: potential impacts on carbon stocks and greenhouse gas emissions, and future research for Australian agriculture

et al. 2012

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“…Furthermore, some studies have shown that P deficiency is another important factor that restricts plant growth, particularly in the tropical and subtropical regions, which are characterized by highly weathered acidic soils. Acidic soil contains many chemical compounds, such as ferric oxide and alumina, that fix P in forms that are unavailable to plants [ 21 ]. The P use efficiency is very low under Al stress, particularly in acid soils with high levels of toxic Al, because Al-P compounds are insoluble [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Phosphorus application reduces aluminum toxicity in two Eucalyptus clones by increasing its accumulation in roots and decreasing its content in leaves

et al. 2018

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Under acidic conditions, aluminum (Al) toxicity is an important factor limiting plant productivity; however, the application of phosphorus (P) might alleviate the toxic effects of Al. In this study, seedlings of two vegetatively propagated Eucalyptus clones, E. grandis × E. urophylla ‘G9’ and E. grandis × E. urophylla ‘DH32-29’were subjected to six treatments (two levels of Al stress and three levels of P). Under excessive Al stress, root Al content was higher, whereas shoot and leaf Al contents were lower with P application than those without P application. Further, Al accumulation was higher in the roots, but lower in the shoots and leaves of G9 than in those of DH32-29. The secretion of organic acids was higher under Al stress than under no Al stress. Further, under Al stress, the roots of G9 secreted more organic acids than those of DH32-29. With an increase in P supply, Al-induced secretion of organic acids from roots decreased. Under Al stress, some enzymes, including PEPC, CS, and IDH, played important roles in organic acid biosynthesis and degradation. Thus, our results indicate that P can reduce Al toxicity via the fixation of elemental Al in roots and restriction of its transport to stems and leaves, although P application cannot promote the secretion of organic acid anions. Further, the higher Al-resistance of G9 might be attributed to the higher Al accumulation in and organic acid anion secretion from roots and the lower levels of Al in leaves.

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“…Aluminum toxicity and P deficiency are two main constraints for crop growth in acidic soils (Kochian et al, 2004;Ma and Ryan, 2010;Zheng, 2010). Aluminum toxicity and P deficiency are two main constraints for crop growth in acidic soils (Kochian et al, 2004;Ma and Ryan, 2010;Zheng, 2010).…”

Section: The Aluminum-phosphorus Interactionmentioning

confidence: 99%

Coadaptation of Plants to Multiple Stresses in Acidic Soils

2014

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Soil acidification is an increasing problem in agricultural production and ecological stability worldwide. An understanding of the mechanisms by which plants adapt to acidic soils would help address this problem. Poor plant growth in acidic soils results from a variety of factors, including proton toxicity; deficiencies in nitrogen, phosphorus, calcium, magnesium; and toxicities of various metals (aluminum (Al), manganese, iron). Aluminum toxicity is generally the primary limitation for plant growth in acidic soils. Although much research has focused on Al toxicity in recent decades, it is rarely the only limiting factor in acidic soils. The occurrence of Al toxicity depends on many other factors that coexist with Al in acidic soils. The interactions between Al and such factors are important determinants of Al toxicity to plants under field conditions. In this review, therefore, instead of focusing only on mechanisms of Al tolerance, we examine the effects of the interactions between Al and other limiting factors on plant adaptation to acidic soils. We summarize research on the interactions between Al and nitrogen, phosphorus, pH, and iron. Accordingly, three strategies are proposed to improve plant growth in acidic soils: a combined application of lime and nutrients, depending on the types of soils and plants; development of plant varieties tolerant to multiple stresses; and inoculation of plants with certain beneficial microbes. This review emphasizes the ability of plants to coadapt to multiple stresses in acidic soils.

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Foreword: Understanding how plants cope with acid soils

Cited by 24 publications

References 32 publications

Soils and climate change: potential impacts on carbon stocks and greenhouse gas emissions, and future research for Australian agriculture

Soils and climate change: potential impacts on carbon stocks and greenhouse gas emissions, and future research for Australian agriculture

Phosphorus application reduces aluminum toxicity in two Eucalyptus clones by increasing its accumulation in roots and decreasing its content in leaves

Coadaptation of Plants to Multiple Stresses in Acidic Soils

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