Photosynthetic Plant Productivity

Nátr, L.; Lawlor, D. W.

doi:10.1201/9781420027877.sec9

Cited by 20 publications

(16 citation statements)

References 22 publications

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“…This could be the result of drought due to excess amounts of salt in the root zone, which leads to reduced photosynthetic capacity, or toxicity of salt in plant tissues (Sairam et al, 2002;Natr and Lawlor, 2005;Neocleous and Vasilakakis, 2007). The increase in growth parameters with the application of potassium could be the result of antagonism between K + and Na + ions in the root zone (Chen et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Soil and foliar application of potassium enhances fruit yield and quality of tomato under salinity

Amjad¹,

Akhtar²,

Anwar‐ul‐Haq³

et al. 2014

Turk J Biol

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IntroductionCrop production in fields is restricted by a number of abiotic stress factors like drought, salinity, light intensity, and temperature. Soil salinization is among the most severe abiotic threats to agriculture. According to a study on global land use patterns, 7% of the earth's total land area (1000 × 10 6 ha) has become saline (Tester and Davenport, 2003).Soil salinity not only affects plant growth but also developmental processes like seed germination, seedling vigor, flowering, and seed setting, primarily because of hyperosmotic stress and ionic imbalance (Sairam and Tyagi, 2004;Demiral et al., 2005). The increased osmotic pressure in the root environment decreases the availability of water to plants and its movement to reproductive organs such as fruits, and, as a result, fruit size is decreased, as seen in tomato and other crops (Li and Stanghellini, 2001;Mavrogianopoulos et al., 2002).Tomato (Solanum lycopersicum L., previously named Lycopersicon esculentum Mill.) is an important crop in several parts of the world, including the regions suffering from drought and soil salinity, such as the Mediterranean region, where these aspects have been studied (Savic et al., 2009;Jensen et al., 2010). Tomato is not regarded as tolerant to abiotic stress factors, but these stresses, such as salinity, may enhance fruit quality by increasing sugar concentration and dry matter content (Yurtseven et al., 2005).Potassium is one of the important macronutrients required for the growth, development, yield, and quality of plants, and it also plays a key role in the survival of plants under abiotic stress conditions, as stress negatively affects the physiological processes of plants such as root and shoot elongation, enzyme activity, water and assimilate transport, synthesis of protein, photosynthetic transport,

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Section: Discussionmentioning

confidence: 99%

Soil and foliar application of potassium enhances fruit yield and quality of tomato under salinity

Amjad¹,

Akhtar²,

Anwar‐ul‐Haq³

et al. 2014

Turk J Biol

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“…However, both shoot fresh and dry masses were more sensitive measurement endpoints than seedling emergence, based on corresponding confidence intervals (Table 2). Because shoot dry mass is considered to be a robust measure of plant growth (Natr and Lawlor, 2005), it may be used as the primary indicator of 2,4-DNT toxicity for comparison of data within our studies. The toxicity of 2,4-DNT was greater in the SSL2001, TSL2001, and KL2006 soils, with shoot dry mass EC 50 values (mg kg − 1 ) ranging from 8 to 42 in SSL2001, 12 to 44 in TSL2001, and 11 to 65 in KL2006, respectively, than in the WCL2001 clay soil, in which the EC 50 values ranged from 40 to 229 mg kg − 1 (Table 2).…”

Section: Phytotoxicity Of 24-dntmentioning

confidence: 99%

Toxicity of 2,4-dinitrotoluene to terrestrial plants in natural soils

Rocheleau¹,

Kuperman²,

Simini³

et al. 2010

Science of The Total Environment

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“…However, suppression in photosynthetic capacity by increased salt stress was ascribed to lower stomatal conductance, inhibition in specific metabolic processes in carbon uptake, perturbation in photochemica1 capacity, or a combination of these (Dubey 2005). Thus, the final biological or economical yield can be increased by increasing the rate of photosynthesis (Nátr and Lawlor 2005).…”

Section: Introductionmentioning

confidence: 99%

Modulation of growth, photosynthetic capacity and water relations in salt stressed wheat plants by exogenously applied 24-epibrassinolide

2008

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Brassinosteroids promote the growth of plants and are effective in alleviating adverse effects of abiotic stresses such as salinity and drought. Under saline conditions, improvement in grain yield is more important than simple growth. Previously it was found that although foliar application of brassinosteroids improved growth of wheat plants, it did not increase grain yield. In present study, influence of root applied 24-epibrassinolide was assessed in improving growth and yield of two wheat cultivars. Plants of a salt tolerant (S-24) and a moderately salt sensitive (MH-97) were grown at 0 or 120 mM NaCl in continuously aerated Hoagland's nutrient solution. Different concentrations of 24-epibrassinolide (0, 0.052, 0.104, 0.156 lM) were also maintained in the solution culture. Exogenous application of 24-epibrassinolide counteracted the salt stress-induced growth and grain yield inhibition of both wheat cultivars. Of the varying 24-epibrassinolide concentrations used, the most effective concentrations for promoting growth were 0.104 and 0.052 lM under normal and saline conditions, respectively. However, root applied 0.052 lM 24-epibrassinolide enhanced the total grain yield and 100 grain weight of salt stressed plants of both cultivars and suggested that total grain yield was mainly increased by increase in grain size which might have been due to 24-epibrassinolide induced increase in translocation of more photoassimilates towards grain. Growth improvement in both cultivars due to root applied 24-epibrassinolide was found to be associated with improved photosynthetic capacity. Changes in photosynthetic rate due to 24-epibrassinolide application were found to be associated with non-stomatal limitations, other than photochemical efficiency of PSII and photosynthetic pigments. Leaf turgor potential found not to be involved in growth promotion.

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Photosynthetic Plant Productivity

Cited by 20 publications

References 22 publications

Soil and foliar application of potassium enhances fruit yield and quality of tomato under salinity

Soil and foliar application of potassium enhances fruit yield and quality of tomato under salinity

Toxicity of 2,4-dinitrotoluene to terrestrial plants in natural soils

Modulation of growth, photosynthetic capacity and water relations in salt stressed wheat plants by exogenously applied 24-epibrassinolide

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