Responses of Ribulose-1,5-Bisphosphate Carboxylase, Protein Content, and Stomatal Conductance to Water Deficit in Maize, Tomato, and Bean

Castrillo, M.; Fernández, Diego; Calcagno, A. M.; Trujillo, Iselen; Guenni, Lelys Bravo de

doi:10.1023/a:1013731210309

Cited by 44 publications

(24 citation statements)

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“…Reduced photosynthesis due to water deficit can be caused by a reduction in light interception due to smaller leaf area and specifi c leaf area, by a reduction in carbon fi xation per unit leaf area, or by damage to the photosynthetic apparatus (Castrillo et al, 2001;Bruce et al, 2002). The effects of water deficit on leaf photosynthetic parameters have been a subject of research for over three decades (Santosi et al, 2009).…”

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confidence: 99%

Leaf Growth, Gas Exchange and Chlorophyll Fluorescence Parameters in Response to Different Water Deficits in Wheat Cultivars

Bao

2011

Plant Production Science

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mentioning

confidence: 99%

Leaf Growth, Gas Exchange and Chlorophyll Fluorescence Parameters in Response to Different Water Deficits in Wheat Cultivars

Bao

2011

Plant Production Science

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“…In addition, according to Gill & Tuteja (2010), ROS accumulation may severely affect cell functionality and integrity with alterations in redox homeostasis, damages to macromolecules and denaturation of proteins. Castrillo et al (2001) highlighted that, at a cellular level, proteins can be damaged by the lack of hydration, which promotes an increase of reactive oxygen species.…”

Section: Resultsmentioning

confidence: 99%

Enzymatic activity of three sugarcane varieties under salt stress

Carvalho

Corrêa

Carvalho

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TSugarcane is a species of great economic importance to Brazil. The study of enzymatic activity has helped to identify varieties of sugarcane tolerant to salt stress, for planting in Brazilian semiarid regions, where there is the occurrence of saline soils. The objective of this study was to evaluate the enzymatic activity of three varieties of sugarcane subjected to stress caused by salinity. The experiment was conducted in a greenhouse at the Federal Rural University of Pernambuco, in a completely randomized design with four replicates. The leaf blade samples were collected for analysis of soluble proteins and determination of the activity of catalase and ascorbate peroxidase. The protein content was higher for RB962962 and lower for the varieties RB92579 and RB867515. However, in RB867515, there was an increase in the activity of ascorbate peroxidase and catalase, while the varieties RB92579 and RB962962 showed a reduction in the activity of these enzymes. These results indicate that the variety RB867515 has a more efficient mechanism in plant protection against the action of reactive oxygen species.Atividade enzimática de três variedades de cana-de-açúcar sob estresse salino R E S U M O A cana-de-açúcar é uma espécie de grande importância econômica para o Brasil. O estudo da atividade enzimática tem ajudado a identificar variedades de cana-de-açúcar tolerantes ao estresse salino para plantio nas regiões semiáridas brasileiras nas quais ocorre incidência de solos salinizados. Objetivou-se, neste estudo, avaliar a atividade enzimática de três variedades de cana-de-açúcar submetidas ao estresse causado pela salinidade. O experimento foi conduzido em casa de vegetação na Universidade Federal Rural de Pernambuco. Foi feito um delineamento inteiramente casualizado, com quatro repetições. Foram coletadas amostras do limbo foliar para análise das proteínas solúveis e determinação da atividade das enzimas catálase e ascorbato peroxidase. O teor de proteínas foi maior para a variedade RB962962 and menor para as variedades RB92579 e RB867515; entretanto se percebeu, na variedade RB867515, aumento da atividade da ascorbato peroxidase e da catálase enquanto que nas variedades RB92579 e RB962962 ocorreu uma redução da atividade dessas enzimas cujos resultados indicam que a variedade RB867515 apresenta um mecanismo mais eficiente na proteção da planta contra a ação de espécies reativas de oxigênio.

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“…Under the same conditions of water stress, the carboxylating function of Rubisco was barely affected in corn leaves, but decreased 2.5 and 7 times in the leaves of tomato (Licopersicum vulgare L.) and garden bean (Phaseolus vulgaris L.), respectively, which was correlated with the drop in leaf protein content [31]. Ontogenetic differences were also clearly traceable.…”

Section: Dark Reactions Of Photosynthesismentioning

confidence: 92%

“…The content of proteins in plant leaves decreases with the onset of water deficiency. According to the few published reports on the matter, ë 3 plants respond to water stress by a more pronounced decrease in leaf proteins than their ë 4 counterparts [8,11,30,31]. The diminution of the protein pool was, most likely, caused by suppressed synthesis and augmented catabolism (due to increased hydrolytic activity).…”

Section: Photosynthetic Pigments and Proteinsmentioning

confidence: 99%

Effect of water stress on the photosynthetic apparatus of plants and the protective role of cytokinins: A review

Chernyad’ev

2005

Appl Biochem Microbiol

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In recent years, the definition of the term stress (meaning "strain" in English) has been extended, so that it is now used in reference to higher and lower plants and even microorganisms, as opposed to the original usage implying humans and animals [1][2][3]. The Canadian physiologist Hans Selye, who coined the term in the 1930s [4], believed that the ability of an organism to adaptation is related to concentration and exertion, in the sense of strenuous efforts undertaken to mobilize this organism's defense systems. Similarity of stress reactions in bacteria (the most ancient inhabitants of Earth) [3] to those occurring in contemporary representatives of eukaryotes [1, 2, 4] is currently a welldocumented fact.The most frequent stress effect experienced by plants and their photosynthetic apparatus is water deficiency. The greenhouse effect (which becomes more and more pronounced), increased evaporation and reduction of water basins, elevation of mean annual temperature, and augmented contamination of the atmosphere by anthropogenic microadulterants (first of all, methane and oxides of carbon and nitrogen) [5, 6] may disrupt gas exchange, dark and light reactions of photosynthesis [7][8][9], and the unified hydrodynamic system of water supply, transport, and transpiration, which ensures normal water homeostasis in plants [10].Photosynthesis is particularly sensitive to effects of water deficiency and increased temperature. Even a small decrease in the water potential of a plant causes its stomata to close, which entails ëé 2 deficiency in photosynthesizing tissues and decreases the intensity of photosynthetic assimilation of CO 2 (which is the integral parameter of the process). As the degree of hydration of the tissues decreases, the photosynthetic apparatus of plants undergoes functional changes, which further develop into disruption of its structure [7-9, 11].Studies of the resistance of agricultural plants to water deficiency are of great importance for the understanding of the mechanism of disrupting effects of stress. Such studies are also necessary for developing scientifically well-grounded methods for restoring the operation of the photosynthetic apparatus and increasing its stability (which in turn increase the harvest. However, alterations of the photosynthetic apparatus (and structural and functional characteristics of chloroplasts in particular), taking place under the conditions of water deficiency, are not as well studied as those occurring under the effect of other stress types (e.g., decreased or increased temperatures, deficiency or excess of nitrogen or other nutritive minerals, and amount and quality of light).Plant resistance to water deficiency is related to metabolic changes and functional and structural rearrangements of photosynthesizing tissues. These changes are coordinated by regulatory systems, of which the most important for processes of plant adaptation are those involving cytokinins and other phytohormones. Cytokinins, which regulate multiple functions in plant cells, were shown to ...

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Responses of Ribulose-1,5-Bisphosphate Carboxylase, Protein Content, and Stomatal Conductance to Water Deficit in Maize, Tomato, and Bean

Cited by 44 publications

References 26 publications

Leaf Growth, Gas Exchange and Chlorophyll Fluorescence Parameters in Response to Different Water Deficits in Wheat Cultivars

Leaf Growth, Gas Exchange and Chlorophyll Fluorescence Parameters in Response to Different Water Deficits in Wheat Cultivars

Enzymatic activity of three sugarcane varieties under salt stress

Effect of water stress on the photosynthetic apparatus of plants and the protective role of cytokinins: A review

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