Salt-Induced Stress Effects on Biomass, Photosynthetic Rate, and Reactive Oxygen Species-Scavenging Enzyme Accumulation in Common Bean

Gama, Peter Batali Samuel; Tanaka, Kiyoshi; Eneji, A. Egrinya; Eltayeb, Amin Elsadig; Siddig, K. El

doi:10.1080/01904160902787925

Cited by 44 publications

(31 citation statements)

References 38 publications

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“…Verificou-se que o PFC apresentou comportamento semelhante ao PFR, indicando que o material orgânico de reserva contido nos cotilédones foi distribuído distintamente entre as estruturas primárias originadas das sementes (parte aérea e raiz), uma vez que foi translocado mais para a parte aérea que para a raiz. Estudos conduzidos por Gama et al (2009), com feijão sob stresse salino, evidenciaram haver redução da raiz, indicando várias limitações de crescimento, afetando também outros parâmetros morfológicos, tais como a altura, número de folhas e parte aérea e, consequentemente, reduzindo o peso desses parâmetros, o que está de acordo com as principais constatações do presente estudo.…”

Section: Resultsunclassified

Efeito de stresse salino em sementes de Phaseolus vulgaris

Dalchiavon¹,

Neves²,

Haga³

2016

Rev. Ciênc. Agr.

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R E S U M OSolos salinos tendem a prejudicar a germinação e o desenvolvimento de plantas de várias culturas, ocasionando problemas agroeconómicos. Este trabalho teve como objetivo verificar o desempenho fisiológico de sementes de feijão-comum submetidas ao efeito de stresse salino. A pesquisa foi realizada no Laboratório de Fisiologia Vegetal do Departamento de Biologia e Zootecnia da UNESP, Ilha Solteira, no mês de maio de 2014, utilizando sementes de feijão-comum, cultivar Pérola. O delineamento utilizado foi o completamente casualizado, com seis tratamentos (0; 1,309; 1,964; 2,620; 3,273 e 3,928 g NaCl L -1 ) e quatro repetições. Foram registrados os seguintes parâmetros: % de germinação, número de plântulas anormais, comprimento da raiz e da parte aérea, peso fresco e seco da raiz, da parte aérea e dos cotilédones, condutividade elétrica e envelhecimento acelerado. Os diferentes níveis de solução salina testados não interferiram nos parâmetros germinação, número de plântulas anormais e condutividade elétrica. Consequentemente, para estes parâmetros, as sementes da cultivar Pérola tiveram bom desempenho fisiológico. Os parâmetros comprimento de raiz e da parte aérea, mostraram-se sensíveis aos níveis mais elevados de salinidade. Palavras-chave: fisiologia de sementes, germinação, Phaseolus vulgaris. A B S T R A C TSaline soils tend to impair germination and plant growth of various crops, resulting in agroeconomic problems. This study aimed to verify the physiological performance of common bean seeds submitted to salt stress. The research was conducted in the Plant Physiology Laboratory, Department of Biology and Animal Science, UNESP, Ilha Solteira, SP, Brazil, in May 2014, using common bean cv. Perola seeds. The design was completely randomized, with six treatments (0; 1,309; 1,964; 2,620; 3,273 and 3,928 g NaCl L -1 ) and four replications. The observations were recorded for: % germination, number of abnormal seedlings, root and shoot length, fresh and dry weight of the roots, shoots and cotyledons, electrical conductivity and accelerated aging. The different levels of saline tested did not affect the germination parameters, number of abnormal seedlings and electrical conductivity. Consequently, for these parameters, the seeds of the cultivar Perola had good physiological performance. The root and shoot length parameters, were sensitive to higher salinity levels.

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Section: Resultsunclassified

Efeito de stresse salino em sementes de Phaseolus vulgaris

Dalchiavon¹,

Neves²,

Haga³

2016

Rev. Ciênc. Agr.

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“…It has been argued that salt-tolerant plants decrease the hydraulic conductance of their roots, thereby reducing the delivery of (salty) water to the shoot (Vysotskaya et al , 2010) and resulting in reduced water potential in their leaves (Gama et al , 2009). While it can be informative to assess the effects of salinity on hydraulic conductance in the roots using a high-pressure flow meter (following, for instance, the method of Tyree et al , 1995) or on water potential in the leaves using a pressure chamber (following, for instance, the method of Scholander et al , 1965), these are specialized measurements that are probably best made in laboratories skilled in such technologies.…”

Section: Introductionmentioning

confidence: 99%

Evaluating physiological responses of plants to salinity stress

Negrão

Schmöckel

Tester

2016

Ann Bot

912

530

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Background Because soil salinity is a major abiotic constraint affecting crop yield, much research has been conducted to develop plants with improved salinity tolerance. Salinity stress impacts many aspects of a plant’s physiology, making it difficult to study in toto. Instead, it is more tractable to dissect the plant’s response into traits that are hypothesized to be involved in the overall tolerance of the plant to salinity.Scope and conclusions We discuss how to quantify the impact of salinity on different traits, such as relative growth rate, water relations, transpiration, transpiration use efficiency, ionic relations, photosynthesis, senescence, yield and yield components. We also suggest some guidelines to assist with the selection of appropriate experimental systems, imposition of salinity stress, and obtaining and analysing relevant physiological data using appropriate indices. We illustrate how these indices can be used to identify relationships amongst the proposed traits to identify which traits are the most important contributors to salinity tolerance. Salinity tolerance is complex and involves many genes, but progress has been made in studying the mechanisms underlying a plant’s response to salinity. Nevertheless, several previous studies on salinity tolerance could have benefited from improved experimental design. We hope that this paper will provide pertinent information to researchers on performing proficient assays and interpreting results from salinity tolerance experiments.

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“…SOD detoxifies superoxide anion free radicals accompanying the formation of H2O2 which is very damaging to the chloroplasts, nucleic acids and proteins (Marschner, 1995). Numerous studies have reported that NaCl treatment increased SOD activity (Ahmad et al 2008;Gama et al, 2008;Maia et al, 2010;Chookhampaeng, 2011;Kahrizi et al, 2012). Accordingly, we also found higher activity of POD in leaves of all the cultivars under salt stress conditions (Fig.…”

Section: Antioxidant Compoundsmentioning

confidence: 99%

Effects of Salt Stress on Plant Growth, Nutrient Partitioning, Chlorophyll Content, Leaf Relative Water Content, Accumulation of Osmolytes and Antioxidant Compounds in Pepper (Capsicum annuum L.) Cultivars

Hand

Taffouo

Nouck

et al. 2017

Not Bot Horti Agrobo

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The salinity of soil is among the most important abiotic stresses which limit agricultural productivity worldwide. The effects of salinity on growth, nutrient partitioning, chlorophyll, leaf relative water content, osmolytes accumulation and antioxidant compounds of pepper (Capsicum annuum L.) cultivars ('Granada', 'Goliath' and 'Nobili'), widely used in Cameroon, were investigated. Plants were subjected to four levels of NaCl (0, 50, 100 and 200 mM) at early seedling growth stage of plant development. Application of NaCl treatment led to a significant increase in total soluble sugars, proline, soluble proteins, total free amino acids content, peroxydase and superoxide dismutase activity and total phenolic content in salt-tolerant 'Granada' and 'Nobili' compared to salt-sensitive 'Goliath' and untreated plants, on the contrary, decreased in root dry weight, shoot dry weight, number of leaves, shoot length, stem diameter, total leaf area, chlorophyll and leaf relative water content in 'Goliath' at low salinity level. Flavonoid content, K, Ca and Mg concentrations were significantly reduced with increasing salinity in all cultivars. The highest Na concentrations were detected in the leaves while the lowest were recorded in the roots of 'Goliath' at high salinity level. The salt sensitivity of 'Goliath' seems to be increased osmotic adjustment through the strongly accumulation of Na in leaves while the salt tolerance of 'Granada' was related to its induce of antioxidative enzyme system more efficiently, resulting in higher osmolytes accumulation under salinity. 'Granada' was more tolerant and stable in physiological and biochemical traits suggesting that it could be grown in salt-affected soils.

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Salt-Induced Stress Effects on Biomass, Photosynthetic Rate, and Reactive Oxygen Species-Scavenging Enzyme Accumulation in Common Bean

Cited by 44 publications

References 38 publications

Efeito de stresse salino em sementes de Phaseolus vulgaris

Efeito de stresse salino em sementes de Phaseolus vulgaris

Evaluating physiological responses of plants to salinity stress

Effects of Salt Stress on Plant Growth, Nutrient Partitioning, Chlorophyll Content, Leaf Relative Water Content, Accumulation of Osmolytes and Antioxidant Compounds in Pepper (Capsicum annuum L.) Cultivars

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