Water use efficiency and consumption in different Brazilian genotypes of Jatropha curcas L. subjected to soil water deficit

Santana, Tessio Araújo de; Oliveira, Priscila Souza de; Silva, Leandro Diego da; Laviola, Bruno Galvêas; Almeida, Alex-Alan Furtado de; Gomes, Fábio Pinto

doi:10.1016/j.biombioe.2015.02.008

Cited by 33 publications

(24 citation statements)

References 21 publications

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“…Water stress strongly affects the leaf hydraulic system, causing a decline in water potential (Brodribb and Holbrook, 2006). Genotypic differences in J. curcas have been detected recently regarding the trade-offs between K L and growth under moderate water deficit (Santana et al, 2015). The authors demonstrated that three genotypes showed similar reductions in biomass accumulation (about 37%), although one of them (CNPAE 126) showed lower reduction in K L (62% as compared to 88% in the other two genotypes).…”

Section: Discussionmentioning

confidence: 98%

“…Leaf gas exchange variables (net photosynthesis (PN), transpiration rate (E), stomatal conductance to water vapor (gS) and the internal CO2 concentration (CI)) were measured at 21, 28, 34, 41, 49, 55 DAST and 6 DAR in fully mature leaves positioned on the stem opposite to those sampled for leaf water potential, between 7 and 10 h in all individuals of each treatment (De Santana et al, 2015). A portable gas exchange system (LI-6400, LI-Cor®, Nebraska / USA) was used.…”

Section: Leaf Gas Exchangementioning

confidence: 99%

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Morphophysiological changes in young plants of Jatropha curcas L. (Euphorbiaceae) subjected to water stress and recovery

Oliveira¹,

Silva²,

Santana³

et al. 2016

Afr. J. Agric. Res.

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To investigate drought-induced changes in morphophysiological characteristics, seedlings of two genotypes of Jatropha curcas (CNPAE 183 and CNPAE 191) were grown under two watering regimes: irrigated (-33.1 to 13.5 to kPa) and water deficit (-409.5 to 49.5 to kPa) for 55 days, followed by six days of rehydration (DAR). Withholding water led to a significant reduction (p<0.05) of leaf water potential (Ψ W ) and an increase in relative water content (RWC). The values of net photosynthetic rate (P N ), stomatal conductance to water vapor (g S ) and transpiration (E) were significantly (p<0.05) reduced 21 and 34 days after starting treatment (DAST) in plants of genotypes CNPAE 183 and CNPAE 191, respectively. After 6 DAR, only CNPAE 191 achieved a recovery of P N and E. Moreover, significantly (p<0.05) lower g S was measured in recovering plants of both genotypes, as compared to the controls. Drought stress led to reductions of 57 and 65% in whole-plant hydraulic conductance (K L ) in genotypes CNPAE 183 and CNPAE 191, respectively. Full recovery of K L was observed after 6 DAR. The average water consumption was 18% lower in plants subjected to water shortage, as compared to irrigated plants. However, drought-induced reduction in growth led to lower biomass water use efficiency (WUE biomass ) in plants subjected to water deficit. The effect of water stress was more intense in CNPAE 183 than in CNPAE 191, regarding the growth variables (leaf area, height and diameter), dry mass and root volume. Moreover, a delay in the effect of water stress in genotype CNPAE 191 was also observed, which suggests a higher tolerance of this genotype as compared to CNPAE 183. Altogether, the results showed strong drought-induced stomatal limitation of carbon assimilation and growth in J. curcas. Slight genotypic differences were detected, CNPAE 191 being less sensitive to the imposed experimental conditions than CNPAE 183.

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Section: Discussionmentioning

confidence: 98%

Section: Leaf Gas Exchangementioning

confidence: 99%

Morphophysiological changes in young plants of Jatropha curcas L. (Euphorbiaceae) subjected to water stress and recovery

Oliveira¹,

Silva²,

Santana³

et al. 2016

Afr. J. Agric. Res.

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“…Stomatal closure is seen as a survival strategy, since it reduces hydraulic conductivity in plants subjected to these stresses reducing transpiration rate, and consequently, water absorption (de Santana et al, 2015;Hubbard et al, 2001;Pezeshki, 2001). As a response to soil flooding, this reduction is common in tolerant as well as non-tolerant to flooding (Kozlowski, 1997).…”

Section: Discussionmentioning

confidence: 99%

Leaf gas exchange and biomass partitioning in Jatropha curcas L. young plants subjected to flooding and drought stresses

Santana¹,

Silva²,

Oliveira³

et al. 2017

Aust J Crop Sci

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With the purpose of assessing the physiological responses of J. curcas young plants to drought and flooding, plants were subjected to three watering regimes: Control, drought and flooding. In the same period, five plants were submitted to drought (irrigation suspension), five to flooding and five were maintained near the field capacity (control). Measurements of leaf gas exchange, chlorophyll content, biomass of each organ (leaf, stem and root), biomass ratios, as well as the root:shoot ratio were made. When compared to control, drought and flooding treatments led to significant reductions (P≤.05) of gas exchange rates at 14 and 7 days after imposition treatments (DAIT), respectively. At the 16 th DAIT, significant reductions of leaf, root, stem and total biomass were observed, which resulted in changes of biomass partitioning of each organ. Significant reduction of leaf dry biomass (LDB) was observed in water deficit plants. Moreover, no significant effects of water deficit were observed in root dry biomass. Such response has led to a higher root:shoot ratio, suggesting an improved ability for water and nutrients uptake. In turn, flooding has induced a significant decrease in the dry biomass of all organs. Stem dry biomass ratio of flooded plants (0.67 g g -1 ) was significantly higher than that of control plants (0.41 g g -1 ), which, was seemingly due to leaf senescence and root system rotting of flooded plants. Altogether, present results reinforce the susceptibility of the studied genotype of J. curcas to flooding, as well as highlight some characteristics of drought tolerance in this species.

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“…The balance between vegetative carbon uptake and water loss is also affected by moisture deficits in the soil and the atmosphere. Theory predicts, and some data confirm, that iWUE should increase when water availability is low (Gomes et al 2009, Schultz and Stoll 2010, de Santana et al 2015. The extent to which changes in atmospheric evaporative demand (i.e.…”

Section: Introductionmentioning

confidence: 94%

Response of ecosystem intrinsic water use efficiency and gross primary productivity to rising vapor pressure deficit

Zhang

Ficklin

Manzoni

et al. 2019

Environ. Res. Lett.

133

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Elevated vapor pressure deficit (VPD) due to drought and warming is well-known to limit canopy stomatal and surface conductance, but the impacts of elevated VPD on ecosystem gross primary productivity (GPP) are less clear. The intrinsic water use efficiency (iWUE), defined as the ratio of carbon (C) assimilation to stomatal conductance, links vegetation C gain and water loss and is a key determinant of how GPP will respond to climate change. While it is well-established that rising atmospheric CO 2 increases ecosystem iWUE, historic and future increases in VPD caused by climate change and drought are often neglected when considering trends in ecosystem iWUE. Here, we synthesize long-term observations of C and water fluxes from 28 North American FLUXNET sites, spanning eight vegetation types, to demonstrate that ecosystem iWUE increases consistently with rising VPD regardless of changes in soil moisture. Another way to interpret this result is that GPP decreases less than surface conductance with increasing VPD. We also project how rising VPD will impact iWUE into the future. Results vary substantially from one site to the next; in a majority of sites, future increases in VPD (RCP 8.5, highest emission scenario) are projected to increase iWUE by 5%-15% by 2050, and by 10%-35% by the end of the century. The increases in VPD owing to elevated global temperatures could be responsible for a 0.13% year −1 increase in ecosystem iWUE in the future. Our results highlight the importance of considering VPD impacts on iWUE independently of CO 2 impacts.

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Water use efficiency and consumption in different Brazilian genotypes of Jatropha curcas L. subjected to soil water deficit

Cited by 33 publications

References 21 publications

Morphophysiological changes in young plants of Jatropha curcas L. (Euphorbiaceae) subjected to water stress and recovery

Morphophysiological changes in young plants of Jatropha curcas L. (Euphorbiaceae) subjected to water stress and recovery

Leaf gas exchange and biomass partitioning in Jatropha curcas L. young plants subjected to flooding and drought stresses

Response of ecosystem intrinsic water use efficiency and gross primary productivity to rising vapor pressure deficit

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