Stomatal and non-stomatal limitations of photosynthesis under water stress in field-grown grapevines

Escalona, J.M.; Flexas, J.; Medrano, H.

doi:10.1071/pp99019

Cited by 168 publications

(121 citation statements)

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“…2). However, as the photosynthetic saturation point declined with drought intensity [6] the same PPFD became probably saturating at a Ψ m lower than −2.5 MPa, producing the increase of NPQ in N. dombeyi and the concomitant decrease in Fv/Fm, ∆F/Fm and qP.…”

Section: Discussionmentioning

confidence: 99%

Differential photosynthetic and survival responses to soil drought in two evergreen Nothofagus species

et al. 2007

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-We asked if differences in distribution betweenNothofagus nitida and N. dombeyi were associated with differences in drought tolerance. Survival, gas exchange and chlorophyll fluorescence were measured on seedlings subjected to a gradual drought. At a predawn leaf water potential (Ψ m ) of −2.7 MPa, survival of N. nitida was 50%, compared to 100% in N. dombeyi. Under well-watered conditions, the two species displayed similar stomatal conductance (g w ) and transpiration (E), but net photosynthesis (A) and instantaneous water-use efficiency (WUE i ) were slightly higher in N. nitida. A, E and g w declined in N. nitida along the gradual drought but increased in N. dombeyi at a Ψ m between −1.5 and −2.5 MPa, and declined then drastically at a Ψ m below < −2.5 MPa. As N. dombeyi was able to maintain A at higher levels despite declining g w , this species displayed significantly increased WUE i at Ψ m below -2.5 MPa. Photochemical efficiency of PSII in the light (∆F/Fm ) and photochemical quenching (qP) were always lower in N. nitida and along with the photochemical efficiency in the dark (Fv/Fm) they declined in both species. Non-photochemical quenching (NPQ) increased slowly in N. dombeyi along with the gradual drought, whilst it decreased in N. nitida. These results show that differences in drought tolerance are in agreement with sorting of Nothofagus species along moisture gradients in south-central Chile.

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Section: Discussionmentioning

confidence: 99%

Differential photosynthetic and survival responses to soil drought in two evergreen Nothofagus species

et al. 2007

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“…So far, numerous papers have been published on different mechanisms of plant acclimation to soil drought and on their role in the selection of cultivars or genotypes resistant to soil water deficit (Flexas et al 1999(Flexas et al , 2006Escalona et al 2000;Flexas and Medrano 2002;Hura et al 2007aHura et al , 2009aHura et al , b, c, 2011Hura et al , 2012Grzesiak et al 2010;Rollins et al 2013;Nolf et al 2014;Borrell et al 2014). However, very few studies investigated the problem of adverse functional changes brought about by the rehydration stage (Oliver et al 1998;Hura et al 2009a).…”

Section: Discussionmentioning

confidence: 99%

Rapid plant rehydration initiates permanent and adverse changes in the photosynthetic apparatus of triticale

Hura

Ostrowska

et al. 2015

Plant Soil

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Background and aims The reasons for partial recovery after a soil drought are not fully understood and have not been studied so far. This study investigated the physiological and biochemical responses of triticale cultivars with differential recovery ability after soil water deficit. Methods Activity of the photosynthetic apparatus under soil drought followed by rehydration was estimated. Plant antioxidant potential was determined based on the measurement of catalase and peroxidase activity. The levels of hydrogen peroxide and superoxide radical were assessed. Results Under rehydration, the not fully-recovered cultivar experienced further significant increase in the content of H 2 O 2 and inhibited activity of the photosynthetic apparatus, as compared to the drought period. On 42 nd day of the rehydration, the not fully-recovered cultivar showed also a reduced photosynthetic activity in the flag leaves, which resulted in a significant decrease in its grain yield. The first week of a rapid rehydration involved a decrease in total peroxidase and catalase activities. The increased content of H 2 O 2 was compensated only when leaf water content was gradually restored in the first week of the rehydration and no further decrease in the activity of the photosynthetic apparatus was noticed. Conclusions A destructive effect of the rapid rehydration was manifested in an intensification of the physiological processes associated with reactive oxygen species (ROS) overproduction. An important cause of hydrogen peroxide overproduction seems to be the electron leakage due to overloading of the electron transport chain (ETC) in the PSI and PSII.

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“…This effect may prevent the metabolic inhibition of CO 2 assimilation that otherwise would occur if stress under field conditions was allowed to develop extensively (e.g. Escalona et al 1999;Maroco et al 2002). The aim of the present work was to analyse the effects of PRD on photosynthesis, stomatal conductance and water use efficiency (both in the short and long term) in field-grown grapevines.…”

Section: Introductionmentioning

confidence: 99%

“…occur when vines are subjected to drought under field conditions (Escalona et al 1999;Maroco et al 2002).…”

Section: Introductionmentioning

confidence: 99%

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

Souza¹,

Marôco²,

Santos³

et al. 2003

Functional Plant Biol.

159

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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 (ca 26%), net CO 2 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 (J max ; 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 (δ 13 C) of grape berries was highest in NI vines (-24.3‰), followed by PRD (-25.4‰) and DI (-25.8‰) and lowest in FI (-26.4‰) vines, suggesting a long-term increase in the efficiency of leaf gas exchange in NI compared with PRD, DI and FI vines. Sap-flow data and estimates of relative stomatal limitation are in accordance with the observed stomatal closure in PRD vines. In this study, we show that PRD irrigation was able to maintain a vine water status closed to FI, but with double water use efficiency, which was due to a reduction of stomatal conductance with no significant decrease in carbon assimilation.

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Stomatal and non-stomatal limitations of photosynthesis under water stress in field-grown grapevines

Cited by 168 publications

References 0 publications

Differential photosynthetic and survival responses to soil drought in two evergreen Nothofagus species

Differential photosynthetic and survival responses to soil drought in two evergreen Nothofagus species

Rapid plant rehydration initiates permanent and adverse changes in the photosynthetic apparatus of triticale

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

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