Partial rootzone drying: regulation of stomatal aperture and carbon assimilation in field-grown grapevines (Vitis vinifera cv. Moscatel)

Functional Plant Biology : FPB
Claudia R de SouzaM Manuela Chaves

Abstract

The effects of 'partial rootzone drying' (PRD) irrigation compared with other irrigation systems, namely non-irrigated (NI), full irrigation (FI) and deficit irrigation (DI), on stomatal conductance and carbon assimilation were evaluated in field-grown grapevines (Vitis vinifera L. cv. Moscatel). At the end of the growing season, pre-dawn leaf water potential was highest in FI (-0.18 ± 0.01 MPa; mean ± s.e.), intermediate in PRD (-0.30± 0.01 MPa) and DI (-0.36 ± 0.02 MPa), and lowest in NI vines (-0.64 ± 0.03 MPa). Stomatal conductance measured under controlled conditions of light and temperature was reduced in NI (ca 60%) and PRD (ca 30%) vines compared with DI and FI vines. Under ambient conditions, NI vines had lower rates of stomatal conductance (ca26%), net CO2 assimilation (ca 28%) and light-adapted PSII quantum yields (ca 47%) than PRD, DI and FI vines. No significant differences were found among the three irrigated treatments. Both maximum electron transport rate (Jmax; ca 30%) and triose-phosphate utilization rates (TPU; ca 20%) were significantly lower in NI and PRD vines than in DI and FI vines. Carbon isotope composition (δ13C) of grape berries was highest in NI vines (-24.3), followed by PRD (-25.4) and DI (-25.8) ...Continue Reading

Citations

Jun 6, 2009·Journal of Experimental Botany·Ian C Dodd
Jan 30, 2015·Journal of Experimental Botany·Ian C DoddMartin S A Blackwell
Apr 1, 2009·Functional Plant Biology : FPB·Zsolt ZsófiSándor Dulai
Jul 27, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·J I L MorisonW J Davies
Feb 26, 2019·Planta·A SongyF Fontaine
Aug 1, 2004·Functional Plant Biology : FPB·Josefina BotaHipólito Medrano
May 11, 2004·Journal of Experimental Botany·Ilkka Leinonen, Hamlyn G Jones
Jun 1, 2011·Functional Plant Biology : FPB·Julie M TararaRussell P Smithyman

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