Leaf chlorophyll fluorescence, hyperspectral reflectance, pigments content, malondialdehyde and proline accumulation responses of castor bean (Ricinus communis L.) seedlings to salt stress levels

Chen, Yingjie; Wan, Shuwen; Zhou, Jian; Yang, Zhiyong; Qin, Pei

doi:10.1016/j.indcrop.2009.07.015

Cited by 212 publications

(132 citation statements)

References 16 publications

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“…However, CaCl 2 (0.5 %) and INA (2.5 mM) treated leaves showed very less amount of free proline content and values remain very close to control which indicates that plants are not in abiotic stress. Results coincide with the findings of Li et al (2010) in which proline accumulation became amplified at intermediate salt level (200 mM) in the seedlings of castor bean.…”

Section: Discussionsupporting

confidence: 89%

Abiotic elicitors mediated elicitation of innate immunity in tomato: an ex vivo comparison

Chakraborty

Ghosh²,

Chandra

et al. 2016

Physiol Mol Biol Plants

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Improvement of the host resistance by using hazard free chemical elicitors is emerging as an alternative approach in the field of plant disease management. In our present work, we have screened the efficacy and possible mechanism of abiogenic elicitors like Dipotassium hydrogen orthophosphate (K 2 HPO 4 ), Oxalic acid (OA), Isonicotinic acid (INA), Salicylic acid (SA), Acetylsalicylate (AS), Arachidonic acid (AA) and Calcium chloride (CaCl 2 ) to stimulate innate immune responses in Lycopersicum esculentum Mill. Excised tomato leaves, treated with elicitors at three different concentrations, were found to stimulate defense and antioxidative enzymes, total phenol and flavonoid content after 24 h of incubation. CaCl 2 (0.5 %) followed by INA (2.5 mM) were found most effective in activation of all such defense molecules in tomato leaves. Furthermore, nitric oxide (NO), a key gaseous mediator in plant defense signaling, was also measured after subsequent elicitor application. Higher doses of elicitors showed an elevated level of reactive oxygen species (ROS) generation, enhanced lipid peroxidation rate and proline content, which indicates the extent of abiotic stress generation on the leaves. However, ROS production, lipid peroxidation rate and proline concentration remain significantly reduced as a result of CaCl 2 (0.5 %) and INA (2.5 mM) application. A sharp increase of total chlorophyll content was also recorded due to treatment of CaCl 2 (0.5 %). These results demonstrate the effects of different abiogenic elicitors to regulate the production of defense molecules. Results also suggest that among all such chemicals, CaCl 2 (0.5 %) and INA (2.5 mM) can be used as a potential elicitor in organic farming of tomato.

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Section: Discussionsupporting

confidence: 89%

Abiotic elicitors mediated elicitation of innate immunity in tomato: an ex vivo comparison

Chakraborty

Ghosh²,

Chandra

et al. 2016

Physiol Mol Biol Plants

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“…Bars indicate standard deviation around the mean Figure 2. Maximum quantum yield of PSII (F v /F m ) and F v /F 0 ratio of leaves of Atriplex nummularia cultivated at levels of electrical conductivity (EC), soil moisture (70%: A and C; 37%: B and D) and different sources of salts light-harvesting complex of PSII (Fernandez et al, 1997;Li et al, 2010), as observed in the present study. On the other hand, the reduction of F v and F m was due to the decrease in the levels of chlorophyll with the increment in EC.…”

Section: Resultssupporting

confidence: 77%

Fluorescence of chlorophyll a and photosynthetic pigments in Atriplex nummularia under abiotic stresses

Melo

Souza

Cunha

2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TChlorophyll a fluorescence is a very useful tool in ecophysiological studies to analyze the photosynthetic performance of plants under biotic and abiotic stresses. This research aimed to evaluate the parameters of the fluorescence of chlorophyll a, contents of chlorophyll a, b and total, and carotenoids in Atriplex nummularia cultivated under water stress (37 and 70% of field capacity) and salt stress (irrigation water with electrical conductivity of 0, 5, 10, 20, 30 and 40 dS m -1 ), besides two sources of salts: NaCl and a mixture of salts of Ca 2+ , Mg +2 , K + , Na + and Cl -, in a 6 x 2 x 2 factorial, with 4 replicates, totaling 96 experimental plots. At 91 days after transplanting, the initial fluorescence (F 0 ), maximum fluorescence (F m ), potential quantum efficiency of photosystem II (F v /F m ), F v /F 0 ratio and the contents of chlorophyll a, b, and total and carotenoids were determined. All assessed parameters decreased as a standard response to salt stress, except F 0 , which had, as a characteristic, the increase in its values under stress conditions. The emission parameters for Atriplex nummularia varied with the type of salt present in the irrigation water.Fluorescência da clorofila a e pigmentos fotossintéticos em Atriplex nummularia sob estresses abióticos R E S U M OA fluorescência da clorofila a é uma ferramenta de grande utilidade em estudos ecofisiológicos para a análise da performance fotossintética de plantas sob estresses bióticos e abióticos. Objetivou-se avaliar os parâmetros da fluorescência da clorofila a, teores de clorofila a, b e total e carotenoides em Atriplex nummularia cultivada sob estresses hídrico (37 e 70% da capacidade de campo) e salino (água de irrigação com condutividade elétrica de 0, 5, 10, 20, 30 e 40 dS m -1 ), além de duas fontes de sais: NaCl e uma mistura com sais de Ca 2+ , Mg 2+ , K + , Na + e Cl -, em fatorial 6 x 2 x 2 com 4 repetições totalizando 96 parcelas experimentais. Aos 91 dias após o transplantio foram determinadas a fluorescência inicial (F 0 ), a fluorescência máxima (F m ), a eficiência quântica potencial do fotossistema II (F v /F m ) e a razão F v /F 0 e os teores de clorofila a, b, total e carotenoides. Os parâmetros de emissão avaliados reduziram como resposta padrão ao estresse salino, com exceção do F 0 que tem, como característica, o aumento de seus valores quando em condições de estresse. Os parâmetros de emissão para a Atriplex nummularia variaram de acordo com o tipo de sal presente na água de irrigação. Key words:photosynthesis water and salt stress halophyte Palavras-chave: fotossíntese estresse salino e hídrico halófita

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“…In present study, the higher proline accumulation is found at 100 mM of NaCl treatment for 15 days in genotype KM-13 and 30 days in genotype ES2138-2. Proline has been shown to accumulate in response to salinity in a number of plant species [8,23,33]. Since proline accumulation in the Sesame genotypes was well-correlated to their growth attributes and production of this free amino acid in the salt-tolerant genotypes was more notable, it seems that it plays some protective roles against salt stress in sesame, at least in the genotypes used in this experiment.…”

Section: Resultsmentioning

confidence: 79%

“…It is mainly due to low precipitation and high transpiration causing disturbance in salt balance in the soil and also renders ground water brackish and affects plant growth adversely [6,7]. Nearly, 80 million hectares of arable lands of the world are estimated to be affected by salt [8]. Salinity effects are more noticeable in arid and semiarid regions, mainly due to the acceleration of salinity by a deficit of precipitation and high temperature coupled with a high evaporation demand [9].…”

Section: * Corresponding Author Email: Grrou T @ Redi Ffmailcommentioning

confidence: 99%

Physiological and biochemical characterization of Sesamum germplasms tolerant to NaCl

2016

J App Biol Biotech

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Sesamum indicum L. (family-Pedaliaceae) is an economically important oil seed crop grown in tropical and subtropical countries. It is widely used in food, nutraceutical, pharmaceutical industries. Salinity is considered as the most important abiotic stress limiting to crop production. In this context, the present study was to evaluate the Sesamum genotypes for salinity tolerance. Germinated seedlings (15-d-old) were used to screen the germplsm at different concentrations (0, 25mM, 50mM, 75mM, 100mM) of NaCl and observation was taken after 15 th , 30 th and 45 th days of treatment. Ion content (Na + , Cl -, Ca ++ , Mg ++ and K ++ ) were measured after 15 days of treatment. Fresh and dry weight was less in salt sensitive genotypes than tolerant genotypes. During increase of salinity concentration, all the genotypes had a negative impact on roots. The seedlings showed reduced growth and displayed variation in ion uptake thus accumulating Na + and Cl -in the roots. At higher concentration of salt treatment showed the more dry weight and displayed more effective ion regulation by manipulating low Na + /K + and Na + /Ca ++ ratio. The tolerant genotypes exhibited the lowest shoot Na + content under salinity conditions. Higher proline accumulation was observed at 100 mM after 15 days of NaCl treatments in 'KM-13' genotype. After 15 days of treatment, the genotype 'ES 2138-2' showed maximum proline accumulation. The total carbohydrates contents increased in all the ten genotypes in presence of NaCl. Highest carbohydrate content was found in genotype 'SI-1926' grown in 100 mM NaCl. Enzyme activities are variable in different genotypes with different concentration of NaCl. This study will help in Sesamum improvement programme.

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Leaf chlorophyll fluorescence, hyperspectral reflectance, pigments content, malondialdehyde and proline accumulation responses of castor bean (Ricinus communis L.) seedlings to salt stress levels

Cited by 212 publications

References 16 publications

Abiotic elicitors mediated elicitation of innate immunity in tomato: an ex vivo comparison

Abiotic elicitors mediated elicitation of innate immunity in tomato: an ex vivo comparison

Fluorescence of chlorophyll a and photosynthetic pigments in Atriplex nummularia under abiotic stresses

Physiological and biochemical characterization of Sesamum germplasms tolerant to NaCl

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