Visible foliar injury caused by ozone alters the relationship between SPAD meter readings and chlorophyll concentrations in cutleaf coneflower

Neufeld, Howard S.; Chappelka, Arthur H.; Somers, Greg L.; Burkey, Kent O.; Davison, A. W.; Finkelstein, Peter L.

doi:10.1007/s11120-005-9008-x

Cited by 73 publications

(50 citation statements)

References 28 publications

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“…One potential limitation of absorbance meters is that at high levels of chlorophyll, so much of the 650-660 nm light is absorbed by the leaf that little remains to be transmitted and measured on the far side (Richardson et al, 2002), and likely CCI values are mainly determined by differences in transmittance at 930-940 nm. Other common chlorophyll meters, such as the Minolta SPAD model, use linear (Gratani, 1992;Neufeld et al, 2006;Yamamoto et al, 2002;Wang et al, 2004) or exponential equations (Markwell et al, 1995;Monje and Bugbee, 1992;Uddling et al, 2007). Although both meters use similar wavelengths, chlorophyll indices are calculated differently, and relationships between the two meters involve third-order polynomial models (Richardson et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Thus, the leaf chlorophyll content is one of the most significant parameters related to the physiological status of plants. Estimations of chlorophyll contents and related chlorophyll parameters have practical implications since they can be used as an index of nutrient status (Berg and Perkins, 2004;Chang and Robinson, 2003;Moran et al, 2000;Wood et al, 1992), physiological stress (Daas et al, 2008;Datt, 1999;Neufeld et al, 2006;Peguero-Pina et al, 2008;Peñuelas and Filella, 1998) and changes in abiotic factors (Abadía et al, 1996;Gratani et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

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Estimation of chlorophyll in Quercus leaves using a portable chlorophyll meter: effects of species and leaf age

Silla¹,

González-Gil²,

González-Molina³

et al. 2010

Ann. For. Sci.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Estimation of chlorophyll in Quercus leaves using a portable chlorophyll meter: effects of species and leaf age

Silla¹,

González-Gil²,

González-Molina³

et al. 2010

Ann. For. Sci.

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“…The SPAD-502 chlorophyll meter can estimate the total chlorophyll amounts in leaves of a variety of species with a high degree of accuracy, which is a nondestructive method (Neufeld et al 2006). For each plant, measurements were taken at three locations on each leaf, two on each side of the midrib on flag leaves, and then averaged.…”

Section: Chlorophyll Contentmentioning

confidence: 99%

Bio fertilizers and zinc effects on some physiological parameters oftriticaleunder water-limitation condition

Arough

Sharifi

2016

Journal of Plant Interactions

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In order to study bio fertilizers and zinc effects on some physiological parameters of triticale under a water-limitation condition, a factorial experiment was conducted based on randomized complete block design with three replications in 2014 and 2015. Experimental factors consisted of three irrigation treatments [normal irrigation (W 0 ); moderate water limitation (W 1 ) and severe water limitation (W 2 )]; four bio fertilizers' levels [(no bio fertilizer (F 0 ), application of mycorrhiza (F 1 ), plant-growth-promoting rhizobacteria (PGPR) (F 2 ) and both application PGPR and mycorrhiza (F 3 )] and four nano zinc oxide levels [(without nano zinc oxide (Zn 0 ) as control, application of 0.3 (Zn 1 ), 0.6 (Zn 2 ) and 0.9 (Zn 3 ) g L −1 )]. Results showed that water limitation decreased chlorophyll content, relative water content, stomatal conductance, quantum yield and grain yield of triticale, whereas electrical conductivity and the activity of catalase (CAT, EC 1.11.1.6), peroxidase (POD, EC 1.11.1.7) and polyphenol oxidase (PPO, EC 1.14.18.1) enzymes were increased. Inoculation of plants with bio fertilizers and zinc application improved these traits (except electrical conductivity) under water-limitation condition as well as normal irrigation. Based on the results, it was concluded that bio fertilizers and nano zinc oxide application can be recommended for profitable triticale production under water-limitation condition.ARTICLE HISTORY

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“…SPAD-502 chlorophyll meter can estimate total chlorophyll amounts in leaves of a variety of species with a high degree of accuracy, which is a non-destructive method (Neufeld et al, 2006). For each plant, measurements were taken at four locations on each leaf, two on each side of the midrib on all fully expanded leaves and then averaged (Khan et al, 2003).…”

Section: Chlorophyll Measurementsmentioning

confidence: 99%

Salicylic acid ameliorates the adverse effect of salt stress on strawberry

Karlıdağ

Yıldırım

Turan

2009

Sci. agric. (Piracicaba, Braz.)

139

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Strawberry is considered as a salinity sensitive species and is adversely affected in response to the salt stress in terms of growth and yield. Pot experiments were conducted to determine the effect of exogenous salicylic acid (SA) application on physiology, growth, chlorophyll and mineral content of strawberry grown under salt stress and greenhouse conditions. Strawberry plants were treated with SA at different concentrations (0.0, 0.25, 0.50 and 1.00 mM). Salinity treatments were established by adding 0 and 35 mM of NaCl to a base complete nutrient solution. Salt stress negatively affected the growth, chlorophyll content and mineral uptake of strawberry plants. However, plants treated with SA often had greater shoot fresh weight, shoot dry weight, root fresh weight and root dry weight as well as higher chlorophyll content under salt stress. The greatest values were obtained with 1.00 mM SA treatment in both saline and non-saline conditions. Leaf water relative content (LWRC) was reduced in response to salt stress while electrolyte leakage was raised. SA treatments induced increases in LWRC and decreases in electrolyte leakage compared to the control under salt stress. With respect to the nutrient content, SA treatments increased almost contents of all nutrients in leaves and roots of strawberry plants under salt stress. The greatest values were often obtained by the 1.00 mM SA treatment. These findings suggest that the SA treatments can ameliorate the negative effect of salinity on the growth of strawberries. Key words: salinity, growth, mineral content MELHORA DO EFEITO DE ESTRESSE SALINO EM MORANGO POR ADIÇÃO DE ÁCIDO SALICÍLICORESUMO: O morango é considerado uma espécie sensível à salinidade e é negativamente afetado por estresse salino, em termos de crescimento e produção. Por meio de experimentos em vaso foi determinado o efeito de ácido salicílico exógeno (SA) na fisiologia, crescimento, conteúdos de clorofila e de minerais, em morangueiros cultivados em estufa sob estresse salino. As concentrações de SA foram 0.0, 0.25, 0.50 e 1.00 mM. O estresse salino foi verificado pela adição de 0 e 35 mM de NaCl à uma solução nutritiva completa. O estresse salino afetou negativamente o crescimento, o conteúdo de clorofila e a absorção dos nutrientes minerais. Entretanto, plantas tratadas com SA muitas vezes apresentam maiores pesos frescos e secos, além de maior concentração de clorofila, sob condições de estresse salino. O conteúdo relativo de água das folhas (LWRC) foi reduzido em resposta ao estresse salino, enquanto o extravasamento de eletrólitos aumentou. Os tratamentos com SA induziram a aumentos em LWRC e diminuições no extravassamento de eletrólitos, em comparação com os controles sob estresse salino. Com respeito aos conteúdos de nutrientes, houve aumento para quase todos os nutrientes com adição de SA nas folhas e raízes sob estresse salino. Os maiores valores forma geralmente obtidos para 1.00 mM SA. Estes resultados sugerem que os tratamentos com SA podem atenuar os efeitos negativos da salin...

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Visible foliar injury caused by ozone alters the relationship between SPAD meter readings and chlorophyll concentrations in cutleaf coneflower

Cited by 73 publications

References 28 publications

Estimation of chlorophyll in Quercus leaves using a portable chlorophyll meter: effects of species and leaf age

Estimation of chlorophyll in Quercus leaves using a portable chlorophyll meter: effects of species and leaf age

Bio fertilizers and zinc effects on some physiological parameters oftriticaleunder water-limitation condition

Salicylic acid ameliorates the adverse effect of salt stress on strawberry

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