Arid
DOI10.1016/j.agwat.2012.06.025
Average daily light interception determines leaf water use efficiency among different canopy locations in grapevine
Medrano, Hipolito; Pou, Alicia; Tomas, Magdalena; Martorell, Sebastia; Gulias, Javier; Flexas, Jaume; Escalona, Jose M.
通讯作者Medrano, Hipolito
来源期刊AGRICULTURAL WATER MANAGEMENT
ISSN0378-3774
EISSN1873-2283
出版年2012
卷号114页码:4-10
英文摘要

In Mediterranean areas grapevine water use efficiency (WUE) is becoming an important issue as grapevine production and quality are largely dependent on irrigation, and given the large area of this crop in this region. Under semi-arid conditions, grapevine water consumption rises up to 700 mm/year (rainfall plus irrigation), thus great water amounts are needed for areas typically characterised by water scarcity during grapevine growing season. Therefore, improving WUE is a challenge to secure agriculture sustainability of viticulture in these areas. In the present work we evaluate the variation of leaf WUE over time (diurnal time) and space (at eight canopy positions) under irrigation, moderate and severe water stress in field-grown Tempranillo grapevines.


Scaling up from the single leaf to the whole plant WUE values were tested comparing daily integrals of leaf water use efficiency (WUEDi) with midday leaf WUE ones showing a poor relationship, that become poured as water stress increased. To evaluate spatial variations of WUE inside the canopy daily integrals Of WUEDi, were determined by leaf gas exchange measurements at eight canopy positions with marked differences in light exposition. Great variations in WUEDi at different canopy locations were mostly determined by the daily integral of light interception with a high regression coefficient for irrigated (0.98) and moderately water stressed plants (0.92), and lower for plants under severe water stress (0.68). This indicates that increased daily PAR interception by the leaf increases WUEDi. Moreover, those data suggest that improvements in whole-plant WUE up to 27% could be achieved by selective thinning of basal (locations 1 and 7) and internal (location 8) leaves of the canopy and that these theoretical benefits would be minor but still significant under water stress. (C) 2012 Elsevier B.V. All rights reserved.


英文关键词Water availability Drought Irrigation Photosynthesis Transpiration
类型Article
语种英语
国家Spain
收录类别SCI-E
WOS记录号WOS:000309381900002
WOS关键词DEFICIT IRRIGATION ; STOMATAL CONDUCTANCE ; ISOTOPE COMPOSITION ; FIELD CONDITIONS ; WHOLE-CANOPY ; PHOTOSYNTHESIS ; DROUGHT ; CULTIVARS ; YIELD ; TRANSPIRATION
WOS类目Agronomy ; Water Resources
WOS研究方向Agriculture ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/171067
作者单位Univ Illes Balears, CSIC, Grp Recerca Biol Plantes Cond Mediterranies, Dept Biol,IMEDEA, Palma De Mallorca 07122, Balears, Spain
推荐引用方式
GB/T 7714
Medrano, Hipolito,Pou, Alicia,Tomas, Magdalena,et al. Average daily light interception determines leaf water use efficiency among different canopy locations in grapevine[J],2012,114:4-10.
APA Medrano, Hipolito.,Pou, Alicia.,Tomas, Magdalena.,Martorell, Sebastia.,Gulias, Javier.,...&Escalona, Jose M..(2012).Average daily light interception determines leaf water use efficiency among different canopy locations in grapevine.AGRICULTURAL WATER MANAGEMENT,114,4-10.
MLA Medrano, Hipolito,et al."Average daily light interception determines leaf water use efficiency among different canopy locations in grapevine".AGRICULTURAL WATER MANAGEMENT 114(2012):4-10.
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