Photosynthetic gas exchange characteristics in three different almond species during drought stress and subsequent recovery

Rouhi, V.; Samson, Roeland; Lemeur, Raoul; Damme, Patrick Van

doi:10.1016/j.envexpbot.2005.10.001

Cited by 155 publications

(93 citation statements)

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“…Differences in photosynthetic rates are most likely to be observed under conditions of environmental stress (Earl and Tollenaar 1999), like e.g. drought (Rouhi et al 2007) and salinity (Ranjbarfordoei et al 2006). Most of the abiotic stresses are connected to anthropogenic activities which are clearly causing major changes in atmospheric chemistry and climate .…”

Section: Introductionmentioning

confidence: 99%

Photosynthesis performance in sweet almond [Prunus dulcis (Mill) D. Webb] exposed to supplemental UV-B radiation

Ranjbarfordoei¹,

Samson²,

Damme³

2011

Photosynt.

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Due to anthropogenic influences, solar UV-B irradiance at the earth's surface is increasing. To determine the effects of enhanced UV-B radiation on photosynthetic characteristics of Prunus dulcis, two-year-old seedlings of the species were submitted to four levels of UV-B stress, namely 0 (UV-B c ), 4.42 (UV-B 1 ), 7.32 (UV-B 2 ) and 9.36 (UV-B 3 ) kJ m -2 d -1 . Effects of UV-B stress on a range of chlorophyll (Chl) fluorescence parameters (FPs), Chl contents and photosynthetic gas-exchange parameters were investigated. UV-B stress promoted an increase in minimal fluorescence of dark-adapted state (F 0 ) and F 0 /F m , and a decrease in variable fluorescence (F v , F v /F m , F v /F 0 and F 0 /F m ) due to its adverse effects on photosystem II activity. No significant change was observed for maximal fluorescence of dark-adapted state (F m ). Enhanced UV-B radiation caused a significant inhibition of net photosynthetic rate (P N ) at UV-B 2 and UV-B 3 levels and this was accompanied by a reduction in stomatal conductance (g s ) and transpiration rate (E). The contents of Chl a, b, and total Chl content (a+b) were also significantly reduced at increased UV-B stress. In general, adverse UV-B effects became significant at the highest tested radiation dose 9.36 kJ m -2 d -1 . The most sensitive indicators for UV-B stress were F v /F 0 , Chl a content and P N . Significant P<0.05 alteration in these parameters was found indicating the drastic effect of UV-B radiation on P. dulcis.

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Section: Introductionmentioning

confidence: 99%

Photosynthesis performance in sweet almond [Prunus dulcis (Mill) D. Webb] exposed to supplemental UV-B radiation

Ranjbarfordoei¹,

Samson²,

Damme³

2011

Photosynt.

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“…Thus, plants respond to salinity at nonstomatal and/or stomatal levels. Nonstomatal responses include instability of pigment-protein complexes and destruction of chloroplast structure (Zaman et al 2002), which inhibits photosynthetic activities (Matos et al 2004, Rouhi et al 2006. At the stomatal level, the stomatal activity is reduced and it limits photosynthesis (Lawlor and Cornic 2002) and photon flux energy used for photochemistry (Cornic 1994).…”

Section: Introductionmentioning

confidence: 99%

Vegetative growth, compatible solute accumulation, ion partitioning and chlorophyll fluorescence of 'Malas-e-Saveh' and 'Shishe-Kab' pomegranates in response to salinity stress

Khayyat¹,

Tehranifar²,

Davarynejad³

et al. 2014

Photosynt.

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The present research was conducted to assess physiological responses of 'Malas-e-Saveh' (Malas) and 'Shishe-Kab' (Shishe) pomegranates to water of different salt content and electrical conductivity (1.05, 4.61, and 7.46 dS m −1). Both cultivars showed a reduced trunk length due to salinity. Relative water content and stomatal conductivity of both cultivars were significantly reduced under salt stress, but ion leakage increased. In both cultivars, total chlorophyll (Chl) and carbohydrates decreased with rise in salinity, while proline accumulation increased. With salinity increment, the Chl fluorescence parameters (maximum photochemical efficiency of PSII and effective quantum yield of PSII) declined significantly in both cultivars, with higher reduction observed in Shishe. Generally, more Na + accumulated in shoots and more Cl − was observed in leaves. Cl − accumulation increased by salinity in leaves of Malas, but it was reduced in Shishe. The K + /Na + ratio in leaves decreased in both cultivars by salinity increment. Malas was less affected by osmotic effects of NaCl, but it accumulated more Cl − in its leaves. Thus, Malas might be more affected by negative effects of salinity.

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“…Therefore, under stress conditions, Ci tends to a decrease in its values, having in mind that the stomatal conductance is reduced, thus limiting the entry of CO 2 through the stomata. Such behavior has been observed in other studies conducted in Prunus by Martinazzo et al (2011Martinazzo et al ( , 2013, Rouhi et al (2007) and Pimentel et al (2014); and this study was discretely checked in plum trees cultivar 'Marianna 2624', on the first and second day of stress for the flooded plants and on the fourth and sixth days for water deficit treatment, where their obtained values differed in relation to the control plants. Different behavior was observed in plants of the rootstock 'Capdeboscq' submitted to flooding, where on the last day of evaluation (third and fourth) reached a significant increase in the values of Ci.…”

Section: Resultsmentioning

confidence: 76%

“…The same occurred in 'Julior' on the same days but for the water deficit treatment. According to Chaves et al (2009), an increase of Ci can be attributed to a heterogeneous stomatal closure and/or interference of the cuticular conductance; however, Rouhi et al (2007) attribute this fact to non-stomatal limitations. Rouhi et al (2007) also observed high leaf abscission in genotypes of Prunus compared to water deficit and also to which occurred in this study, the Ci values obtained significant increase under this condition.…”

Section: Resultsmentioning

confidence: 99%

“…According to Chaves et al (2009), an increase of Ci can be attributed to a heterogeneous stomatal closure and/or interference of the cuticular conductance; however, Rouhi et al (2007) attribute this fact to non-stomatal limitations. Rouhi et al (2007) also observed high leaf abscission in genotypes of Prunus compared to water deficit and also to which occurred in this study, the Ci values obtained significant increase under this condition. Aschan and Pfanz (2003) explain that non-stomatal limitations are observed under conditions of severe stress and high leaf abscission and depend directly on the degree of tolerance of the studied genotype.…”

Section: Resultsmentioning

confidence: 99%

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EVALUATION OF GAS EXCHANGES IN DIFFERENT Prunus SPP. ROOTSTOCKS UNDER DROUGHT AND FLOODING STRESS

et al. 2017

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-The state of Rio Grande do Sul is the largest peach productor in Brazil; however, it still possesses poor yield values when compared with other states. One of the problems associated with this is the occurrence of soils with drainage problems, mainly in Pelotas region, which depending on the year period, may undergo water deficit or flooding situations in the great majority of the years, which harm the crop development and yield. Among the harmful effects caused by these stresses stand out, the decrease in the net assimilation rate, closure of stomata, reduction of the cell activities, production of reactive oxygen species, membrane and protein destabilization. Thus, the aim of this study was to investigate in what magnitude of the gaseous exchange parameters of Prunus spp. rootstocks are influenced under drought and flood stress. In the experiment, gas exchange parameters net photosynthetic rate (A) stomata conductance (gs), intercellular carbon (Ci) and transpiration (E)] were evaluated in three Prunus spp. rootstocks (peach tree 'Capdeboscq' and plum trees 'Julior' and 'Marianna 2624') under three water conditions (control, water deficit and soil flooding) for seven days. The three rootstocks proved more susceptible to flooding than to water deficit, only varying in response time, which is intrinsic to each genotype, and that there is a genetic variability for the tolerance to the studied stresses. The variation on physiological response to the water deficit stress was later in both evaluated genotypes. However, in general, 'Julior' presented greater tolerance to both stresses when compared to the other rootstocks evaluated. Such information is useful to help in the choice of rootstocks for plant production, in the orchard management and for plant breeding programs, aiming at the selection of new genotypes with increased tolerance to these water stresses. Index terms: water stress, photosynthesis, peach tree, plum tree. PARÂMETROS DE TROCAS GASOSAS EM DIFERENTES PORTA ENXERTOS DE Prunus SPP. SUBMETIDOS AO ESTRESSE POR SECA E ALAGAMENTORESUMO-O Estado do Rio Grande do Sul é o detentor da maior produção de pêssegos do Brasil; entretanto, ainda possui valores baixos de produtividade, quando comparado com outros estados. Um dos problemas associados a isto é a ocorrência de solos com problemas de drenagem, principalmente na região de Pelotas que, dependendo do período do ano, podem sofrer situações de déficit hídrico ou de alagamento, na grande maioria dos anos, que prejudicam o desenvolvimento e a produtividade da cultura. Dentre os efeitos prejudiciais causados por estes estresses, destacam-se a diminuição na taxa assimilatória líquida, fechamento de estômatos, a redução das atividades celulares, a produção de espécies reativas de oxigênio e a desestabilização de membranas e de proteínas. Desta forma, o objetivo deste trabalho foi investigar em que magnitude os parâmetros de trocas gasosas de porta-enxertos de Prunus spp. são influenciados sob estresse por seca e alagamento. No experimento, foram avali...

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Photosynthetic gas exchange characteristics in three different almond species during drought stress and subsequent recovery

Cited by 155 publications

References 33 publications

Photosynthesis performance in sweet almond [Prunus dulcis (Mill) D. Webb] exposed to supplemental UV-B radiation

Photosynthesis performance in sweet almond [Prunus dulcis (Mill) D. Webb] exposed to supplemental UV-B radiation

Vegetative growth, compatible solute accumulation, ion partitioning and chlorophyll fluorescence of 'Malas-e-Saveh' and 'Shishe-Kab' pomegranates in response to salinity stress

EVALUATION OF GAS EXCHANGES IN DIFFERENT Prunus SPP. ROOTSTOCKS UNDER DROUGHT AND FLOODING STRESS

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