Spring root-zone temperature regulates root growth, nutrient uptake and shoot growth dynamics in grapevines

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dc.contributor.authorClark, SJen_AU
dc.contributor.authorLamont, KJen_AU
dc.contributor.authorPan, HYen_AU
dc.contributor.authorBarry, LAen_AU
dc.contributor.authorHall, Aen_AU
dc.contributor.authorRogiers, SYen_AU
dc.date.accessioned2016-01-29T00:32:16Zen_AU
dc.date.available2016-01-29T00:32:16Zen_AU
dc.date.issued2015-08-06en_AU
dc.date.statistics2016-01-29en_AU
dc.description.abstractAbstract Background and Aims Environmental factors such as root-zone temperature can influence plant development. Linkages between spring soil temperature, carbohydrate reserve mobilisation, nutrient uptake and nitrogen partitioning were investigated in Shiraz grapevines to gain better understanding of how this abiotic factor can alter root and canopy development. Methods and Results Plants were exposed to a cool, an ambient or a warm root-zone temperature over a 9-week period from budburst. Root starch mobilisation was correlated to the sum of cumulative heat units absorbed by the soil (soil growing degree days, GDDsoil) and this contributed to greater fine root density and extent of root branching. Most macronutrients, including N, accumulated to greater concentration in the leaves of vines exposed to the warm root-zones. Patterns of 15N accumulation indicated that despite greater fertiliser-N uptake in the warm root-zone treatment, most of the N that accumulated in the shoots was the result of N reserve mobilisation. Warmed root-zones resulted in plants with accelerated leaf emergence, extended internodes and elongated shoots with larger leaves. Plant leaf area and shoot dry mass were both positively correlated to GDDsoil, but inversely correlated to root starch concentration, indicating a link between root carbohydrate reserve mobilisation and shoot growth. Conclusions Warm soils stimulated root starch and N mobilisation, root growth and primary nutrient uptake with further consequences on canopy growth and altered N partitioning among the plant components. Significance of the Study Following winter dormancy, GDDsoil can thus be used to model above- and below-ground plant growth responses in the grapevine.© 2015 Australian Society of Viticulture and Oenology Inc.en_AU
dc.identifier.citationClarke, S. J., Lamont, K. J., Pan, H. Y., Barry, L. A., Hall, A., & Rogiers, S. Y. (2015). Spring root-zone temperature regulates root growth, nutrient uptake and shoot growth dynamics in grapevines. Australian Journal of Grape and Wine Research, 21(3), 479-489. doi: 10.1111/ajgw.12160en_AU
dc.identifier.govdoc6416en_AU
dc.identifier.issn1755-0238en_AU
dc.identifier.issue3en_AU
dc.identifier.journaltitleAustralian Journal of Grape and Wine Researchen_AU
dc.identifier.pagination479-489en_AU
dc.identifier.urihttp://dx.doi.org/10.1111/ajgw.12160en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6559en_AU
dc.identifier.volume21en_AU
dc.language.isoenen_AU
dc.publisherWileyen_AU
dc.subjectSpringsen_AU
dc.subjectRootsen_AU
dc.subjectNutrientsen_AU
dc.subjectUptakeen_AU
dc.subjectCarbohydratesen_AU
dc.subjectDynamicsen_AU
dc.titleSpring root-zone temperature regulates root growth, nutrient uptake and shoot growth dynamics in grapevinesen_AU
dc.typeJournal Articleen_AU
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