2012
DOI: 10.5433/1679-0359.2012v33n2p553
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Abstract: ResumoNa cana-de-açúcar, cultura de grande importância econômica no Brasil, os efeitos dos estresses abióticos causam acentuada redução da produtividade inferindo negativamente na agroindústria canavieira. Em busca de encontrar parâmetros que atuem como indicadores fisiológicos da aclimatação das plantas aos efeitos da combinação de estresses, o presente trabalho avaliou a atividade da redutase do nitrato e os teores de clorofilas em plantas jovens de cana-de-açúcar, cv. IAC91-5155, sob efeito simultâneo de do… Show more

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Cited by 15 publications
(16 citation statements)
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“…Based on the test of means ( Figure 1A), in the West Indian Cherry plants irrigated using water of the highest ECw (3.8 dS m -1 ), chlorophyll a contents decreased by 0.79 µg cm -2 in comparison to those subjected to the lowest saline level (0.8 dS m -1 ). The reduction in chlorophyll a content ( Figure 1A) in West Indian Cherry plants exposed to water salinity may have occurred due to the decrease in the synthesis of chlorophylls or due to the participation of the chlorophyllase enzyme, which degrades the molecules of this photosynthesizing pigment (Freire et al, 2013 Carlin et al (2012) mention that the reduction in chlorophyll biosynthesis can be a form of adaptation to the stress condition to which the crop was subjected, aiming at energy saving and lower light energy capture to avoid oxidative stress, possibly resulting from photooxidation of the pigments, which damage the plants by oxidizing membrane lipids, proteins and nucleic acids. In addition, the decrease in chlorophyll a content of the West Indian Cherry observed in this study in plants cultivated at the highest saline level (3.8 dS m -1 ) may be a strategy to conserve energy and absorb less light energy and consequently decrease flow of electrons to the electron transfer chain, thus avoiding eventual photooxidative stresses (Silva et al, 2016).…”
Section: Resultsmentioning
confidence: 99%
“…Based on the test of means ( Figure 1A), in the West Indian Cherry plants irrigated using water of the highest ECw (3.8 dS m -1 ), chlorophyll a contents decreased by 0.79 µg cm -2 in comparison to those subjected to the lowest saline level (0.8 dS m -1 ). The reduction in chlorophyll a content ( Figure 1A) in West Indian Cherry plants exposed to water salinity may have occurred due to the decrease in the synthesis of chlorophylls or due to the participation of the chlorophyllase enzyme, which degrades the molecules of this photosynthesizing pigment (Freire et al, 2013 Carlin et al (2012) mention that the reduction in chlorophyll biosynthesis can be a form of adaptation to the stress condition to which the crop was subjected, aiming at energy saving and lower light energy capture to avoid oxidative stress, possibly resulting from photooxidation of the pigments, which damage the plants by oxidizing membrane lipids, proteins and nucleic acids. In addition, the decrease in chlorophyll a content of the West Indian Cherry observed in this study in plants cultivated at the highest saline level (3.8 dS m -1 ) may be a strategy to conserve energy and absorb less light energy and consequently decrease flow of electrons to the electron transfer chain, thus avoiding eventual photooxidative stresses (Silva et al, 2016).…”
Section: Resultsmentioning
confidence: 99%
“…These adjustments on Al-treated plants could not be attributed always to decrease activities of Calvin-Benson cycle enzymes (Chen et al, 2005). In sugar cane, the activity of nitrate reductase, for exemple is indicative only water stress effect, but not aluminum (Carlin et al, 2012). Konrad et al (2005) associated the increase of non-photochemical dissipation to Al stress responses in coffee trees.…”
Section: Resultsmentioning
confidence: 99%
“…For carrying out this study, the nutritive solution was provided by means of the system described by Dantas et al (2001). Briefly, seedlings were obtained from culm billets (3 cm length) containing one bud each and followed the methods described in Carlin, Rhein and Santos, (2012). After cutting, the culm billets were immediately planted in 500 mL capacity plastic containers with holes in the lower part and containing washed and sieved (2 mm) sand.…”
Section: Experiments For Methodology Adjustmentmentioning
confidence: 99%
“…Considering that plants are routinely subjected to the interaction of different abiotic stresses, it seems coherent to consider that in these studies the genotypes be submitted to their combined effect (Carlin;Rhein;Santos, 2012). However, most studies with the aim at evaluating the behavior of genotypes to abiotic stresses are limited to studying one factor at a time (Fonseca Júnior et al, 2014;Maia et al, 2018).…”
Section: Introductionmentioning
confidence: 99%