Atividade fotossintética em plantas de ameixeira submetidas ao déficit hídrico e ao alagamento

Martinazzo, Emanuela Garbin; Perboni, Anelise Tessari; Oliveira, Pablo Valadão de; Bianchi, Valmor João; Bacarin, Marcos Antônio

doi:10.1590/s0103-84782012005000126

Cited by 21 publications

(20 citation statements)

References 13 publications

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“…The stomatal closure and reduction in post-water stress net photosynthesis have been reported in Prunus (MARTINAZZO et al, 2011;MARTINAZZO et al, 2013;PIMENTEL et al, 2014). In trials where rootstocks of 'GXN-9' hybrid (Prunus dulcis Mill.…”

Section: Resultsmentioning

confidence: 95%

“…Added to that, in the great majority of the years, annual average rainfall is considered high (≈1,500 mm), but, not always is well distributed along the year, which can cause flooding due to excess of raining in certain periods (MARTINAZZO et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…This condition, decreasing the oxygen levels in the environment around the roots, inducing root asphyxia and greatly damaging critical periods of the crop, as it is the case of the blossoming period and beginning of sprouting (MARTINAZZO et al, 2013). On the other hand, almost every year, some region of the earth is affected by water deficit, damaging crops and harming or even interrupting agricultural production (NAKASHIMA et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, almost every year, some region of the earth is affected by water deficit, damaging crops and harming or even interrupting agricultural production (NAKASHIMA et al, 2014). Such situation can be find in the state of Rio Grande do Sul in the months comprehended among November and January, where the rainfall deficit periods are recurrent, and being able to take the plant to undergo a drought stress in the period which precedes fruit ripening, affecting in a crucial manner their quality and the orchard yield (MARTINAZZO et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…A series of studies has reported that the photosynthetic process is progressively reduced in plants submitted to water stress conditions, at first as a protective effect as well as in consequence of the stomata closure, decrease of the leaf area and decrease of the chlorophyll content in the leaf (MARTINAZZO et al, 2013, PIMENTEL et al, 2014, resulting into significant physiological restraints which can cause severe falls in plant yield (NAKASHIMA et al, 2014).…”

Section: Introductionmentioning

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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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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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Transcriptome profiling of Prunus persica plants under flooding

Klumb

Arge

Amaral

et al. 2017

Trees

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Tolerance to waterlogging in young Euterpe oleracea plants

Pereira¹,

Lobato²,

Alves³

et al. 2014

Photosynt.

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This study investigated whether gas exchange and the present content of antioxidant compounds can contribute to the survival of Euterpe oleracea plants in environments of frequent waterlogging. A factorial randomised, experimental design included two distinct water conditions (waterlogging and control) and five evaluation times (0, 6, 12, 18, and 24 d). Gasexchange parameters, leaf temperature, electrolyte leakage, and contents of antioxidant compounds were measured. Waterlogging did not promote significant alterations in net photosynthetic rate and transpiration, and stomatal conductance was reduced only after 18 d. Malondialdehyde and glutathione contents did not significantly change during waterlogging. Additionally, electrolyte leakage was significant only after 18 d of waterlogging. Thus, this study revealed that maintenance in gas exchange and antioxidant compounds might contribute to the survival of E. oleracea plants in environments exposed to waterlogging.

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Atividade fotossintética em plantas de ameixeira submetidas ao déficit hídrico e ao alagamento

Cited by 21 publications

References 13 publications

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

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

Transcriptome profiling of Prunus persica plants under flooding

Tolerance to waterlogging in young Euterpe oleracea plants

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