Interactive Effects of Thiourea and Phosphorus on Clusterbean Under Water Stress

Burman, Uday; Garg, B. K.; Kathju, S.

doi:10.1023/b:biop.0000024276.03834.8d

Cited by 55 publications

(39 citation statements)

References 21 publications

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“…They suggested that increase in the storage pool of nitrate in shoots under drought stress is related to its role as an osmoticum. Nitrate reductase is considered as an enzyme sensitive to water stress (Barathi et al 2001;Burman et al 2004) but in our investigations, imposed stress factors did not change plant turgor and water content in examined organs of cucumber (Table 1).…”

Section: Discussioncontrasting

confidence: 47%

Effect of salt and water stresses on growth, nitrogen and phosphorus metabolism in Cucumis sativus L. seedlings

et al. 2011

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Plants exposed to osmotic stress exhibit changes in their physiology and metabolism. In general, osmotic stress reduces water availability and causes nutritional imbalance in plants. In the present study, we compared the response of cucumber (Cucumis sativus L. var. W³adko F-1) to ionic (100 mmol·dm -3 NaCl) and osmotic stress (10% PEG 6000). Both stress factors reduced significantly fresh and dry weight of 7-day-old cucumber seedlings. Under PEG treatment reduction of cucumber dry mass was lesser than in fresh mass, whereas under salt stress decrease in dry weight of cucumber shoots was more pronounced than in fresh mass. Salt stress caused severe decrease in nitrate concentration and activity of nitrate reductase (NR). In cotyledons nitrate content declined to 17% of the control and similar reduction in NR activity was observed. In the roots, observed changes were not so drastic but there was also strong interaction between reduction in nitrate content and NR activity. Under 10% PEG both nitrate concentration and NR activity in cucumber roots were significantly higher in comparison to control plants. In cotyledons NR activity was significantly lower than in control plants, while decrease in nitrate content was not statistically significant. Phosphate concentration did not change significantly in cucumber cotyledons but increased in roots treated both NaCl (32% increase) and PEG (53% increase). Similar tendencies were observed in acid phosphatase activity. Obtained results indicated that osmotic and salt stresses evoke differential responses, particularly in growth reduction and nitrogen metabolism in cucumber seedlings.

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Section: Discussioncontrasting

confidence: 47%

Effect of salt and water stresses on growth, nitrogen and phosphorus metabolism in Cucumis sativus L. seedlings

et al. 2011

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“…Salt stress, in fact, has been reported to reduce these compounds in plants (Raza et al 2007;Daei et al 2009;Uddin et al 2011) thereby causing reduced biomass production of different plant species. Secondly, this enhancement in the biomass production in maize plants due to foliar application of mannitol and thiourea might have been due to their role in cellular osmotic adjustment (Burman et al 2004;Seckin et al 2009), because in the present study, foliar application of these organic compounds significantly enhanced the leaf RWC of maize plants that was positively associated with the enhanced plant biomass production.…”

Section: Discussionmentioning

confidence: 57%

Exogenous application of mannitol and thiourea regulates plant growth and oxidative stress responses in salt-stressed maize (Zea maysL.)

Kaya

Sönmez

Aydemir

et al. 2013

Journal of Plant Interactions

103

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The mechanism of growth amelioration in salt-stressed maize (Zea mays L. cv., DK 647 F1) by exogenously applied mannitol (M) and thiourea (T) was investigated. Maize seedlings were planted in pots containing perlite and subjected to 0 or 100 mM NaCl in full strength Hoagland's nutrient solution. Two levels of M (15 and 30 mM) or T (3.5 and 7.0 mM) were sprayed to the leaves of maize seedlings 10 days after germination. Salinity stress caused considerable reduction in plant dry biomass, chlorophyll content, and relative water content in the maize plants. However, it increased the activities of catalase (CAT; EC 1.11.1.6), superoxide dismutase (SOD; EC 1.15.1.1), and polyphenol oxidase (PPO; EC 1.10.3.1), and levels of hydrogen peroxide (H 2 O 2 ) and electrolyte leakage, but it did not change peroxidase (POD; EC 1.11.1.7) activity. Foliar application of M or T was found to be effective in checking salt-induced shoot growth inhibition. Exogenously applied M or T reduced the activities of CAT, SOD, POD, and PPO in the salt-treated maize plants compared to those in the plants not fed with these organic compounds. Salinity increased Na ' contents but decreased those of K ' , Ca 2 ' , and P in the leaves and roots of the maize plants. Foliar-applied M or T increased the contents of K ' , Ca 2 ' , and P, but decreased that of Na ' in the salt-stressed maize plants with respect to those of the salt-stressed plants not supplied with mannitol or thiourea. Mannitol was found to be more effective than thiourea in improving salinity tolerance of maize plants in terms of growth and physiological attributes measured in the present study.

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“…As mentioned above, Roundup significantly decreased water content in roots and simultaneously increased markedly nitrate reductase activity. Literature data state that nitrate reductase is characterized by high sensitivity to water deficit and its activity rapidly falls under water stress (Barathi, et al, 2001;Burman, et al 2004). It is possible that some stress proteins protect root enzymes and their mRNA against negative influence of water deficit and directly against damage caused by Roundup.…”

Section: Discussionmentioning

confidence: 99%

Laboratory Study to Investigate the Response of Cucumis sativus L. to Roundup and Basta Applied to the Rooting Medium

Sacała¹,

Demczuk²,

Grzys³

2011

Herbicides - Mechanisms and Mode of Action

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Interactive Effects of Thiourea and Phosphorus on Clusterbean Under Water Stress

Cited by 55 publications

References 21 publications

Effect of salt and water stresses on growth, nitrogen and phosphorus metabolism in Cucumis sativus L. seedlings

Effect of salt and water stresses on growth, nitrogen and phosphorus metabolism in Cucumis sativus L. seedlings

Exogenous application of mannitol and thiourea regulates plant growth and oxidative stress responses in salt-stressed maize (Zea maysL.)

Laboratory Study to Investigate the Response of Cucumis sativus L. to Roundup and Basta Applied to the Rooting Medium

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