Food security and drought

Parry, M. A. J.; Lea, Peter J.

doi:10.1111/j.1744-7348.2009.00370.x

Cited by 11 publications

(3 citation statements)

References 23 publications

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“…The results provide evidence for the further use of this mutant in the study of integrative interactions between light and the diverse endogenous molecules involved in signal transduction controlling water status. In addition, although hp1 has enhanced stomatal conductance, our results show that WUE, which is critical in determining the capacity for adaptation and the productivity of plants (Parry & Lea 2009), did not alter. This reinforces current expectations of using this mutation to enhance antioxidant content of edible fruits (Azari et al.…”

Section: Resultsmentioning

confidence: 61%

Enhanced transpiration rate in the high pigment 1 tomato mutant and its physiological significance

et al. 2011

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Tomato high pigment (hp) mutants represent an interesting horticultural resource due to their enhanced accumulation of carotenoids, flavonoids and vitamin C. Since hp mutants are known for their exaggerated light responses, the molecules accumulated are likely to be antioxidants, recruited to deal with light and others stresses. Further phenotypes displayed by hp mutations are reduced growth and an apparent disturbance in water loss. Here, we examined the impact of the hp1 mutation and its near isogenic line cv Micro-Tom (MT) on stomatal conductance (gs), transpiration (E), CO(2) assimilation (A) and water use efficiency (WUE). Detached hp1 leaves lost water more rapidly than control leaves, but this behaviour was reversed by exogenous abscisic acid (ABA), indicating the ability of hp1 to respond to this hormone. Although attached hp1 leaves had enhanced gs, E and A compared to control leaves, genotypic differences were lost when water was withheld. Both instantaneous leaf-level WUE and long-term whole plant WUE did not differ between hp1 and MT. Our results indicate a link between exaggerated light response and water loss in hp1, which has important implications for the use of this mutant in both basic and horticultural research.

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Section: Resultsmentioning

confidence: 61%

Enhanced transpiration rate in the high pigment 1 tomato mutant and its physiological significance

et al. 2011

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“…Internationally and in Australia, climate change is increasing food insecurity, with risks for nutrition and health. Through the increased frequency and duration of adverse weather events such as drought, cyclones and flooding, climate change can reduce agricultural productivity and the viability of agricultural support industries [ 15 – 18 ]. These climate impacts can affect food yields, household livelihoods and food prices, which influence dietary habits through food availability and affordability pathways [ 17 , 19 – 21 ].…”

Section: Introductionmentioning

confidence: 99%

The impact of drought on the association between food security and mental health in a nationally representative Australian sample

et al. 2014

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BackgroundThe association between food insecurity and mental health is established. Increasingly, associations between drought and mental health and drought and food insecurity have been observed in a number of countries. The impact of drought on the association between food insecurity and mental health has received little attention.MethodsPopulation-based study using data from a nationally representative panel survey of Australian adults in which participants report behaviour, health, social, economic and demographic information annually. Exposure to drought was modelled using annual rainfall data during Australia’s ‘Big Dry’. Regression modelling examined associations between drought and three indicative measures of food insecurity and mental health, controlling for confounding factors.ResultsPeople who reported missing meals due to financial stress reported borderline moderate/high distress levels. People who consumed below-average levels of core foods reported more distress than those who consumed above the average level, while people consuming discretionary foods above the average level reported greater distress than those consuming below the threshold. In all drought exposure categories, people missing meals due to cost reported higher psychological distress than those not missing meals. Compared to drought-unadjusted psychological distress levels, in most drought categories, people consuming higher-than-average discretionary food levels reported higher levels of distress.ConclusionsExposure to drought moderates the association between measures of food insecurity and psychological distress, generally increasing the distress level. Climate adaptation strategies that consider social, nutrition and health impacts are needed.Electronic supplementary materialThe online version of this article (doi:10.1186/1471-2458-14-1102) contains supplementary material, which is available to authorized users.

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“…Environmental problems, depletion of finite resources and human health concerns linked to the current use of inorganic fertilisers, irrigation, herbicides and pesticides have led to the search for alternative strategies to combat limiting soil nutrients and water levels and the effects of weeds and pests on crops (Andrews et al , 2003, 2004, 2009; Raven et al , 2004, 2005; O’Brien & Mullins, 2009; Parry & Lea, 2009; Royal Society, 2009). Microorganisms can interact positively with plants in agricultural systems in relation to their nutrition and their ability to resist biotic and abiotic stresses and have potential to be manipulated such that these positive effects are enhanced (Tikhonovich & Provorov, 2009; Andrews et al , 2010).…”

Section: Introductionmentioning

confidence: 99%

Positive plant microbial interactions in perennial ryegrass dairy pasture systems

Andrews

Edwards

Ridgway

et al. 2011

Annals of Applied Biology

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Literature on positive plant microbial interactions in perennial ryegrass dairy pasture systems is reviewed and interactions that have been reported to have a substantial impact on pasture production and/or levels of chemical inputs into or losses from the system are assessed. Utilisation of N2 fixing (rhizobia) white clover as the N input into a perennial ryegrass pasture is likely to give pasture and milk production similar to that with addition of 200 kg inorganic N ha−1 annum−1 and avoid greenhouse gas emissions resulting from N fertiliser production. Use of the nitrification inhibitor dicyandiamide that de‐activates the ammonia monooxygenase enzyme in ammonia‐oxidising bacteria can substantially reduce NO3− leaching and N2O emissions from perennial ryegrass pastures while increasing productivity. Infection of perennial ryegrass plants with the fungal endophyte Neotyphodium lolii is very significant for the production and persistence of dairy pastures in Australasia due to the endophyte producing a range of alkaloids that confer benefit to the host plant through insect resistance/repellance. In addition, there is considerable potential to manipulate rumen microorganisms such that methane production per unit organic matter intake and the proportion of N uptake that is excreted in urine are decreased while production is maintained or increased. Also, P‐solubilising bacteria and mycorrhizas are worthy of study in relation to the development of inoculants for use as a mechanism to increase P availability in pastures from reserves in the soil and/or applied rock phosphate.

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Food security and drought

Cited by 11 publications

References 23 publications

Enhanced transpiration rate in the high pigment 1 tomato mutant and its physiological significance

Enhanced transpiration rate in the high pigment 1 tomato mutant and its physiological significance

The impact of drought on the association between food security and mental health in a nationally representative Australian sample

Positive plant microbial interactions in perennial ryegrass dairy pasture systems

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