Nutrient Uptake by Plants Under Stress Conditions

Alam, S. M.

doi:10.1201/9780824746728.ch12

Cited by 124 publications

(23 citation statements)

References 168 publications

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“…Generally, there are different reports on the effect of drought stress on the concentrations of nutrients in plant species. Nitrogen reduction in water stress conditions (Alam, 1999;Ram et al, 1995) and its increase under drought stress (Rahman et al, 1971) have been reported. In this experiment, Wr2B3, Wr2B4, Wr3B3, and Wr3B4 treatments increased leaf N content by 54%, 52%, 50%, and 58%, respectively, while soil N content was the highest in Wr1B3 and Wr1B4 treatments.…”

Section: Discussionmentioning

confidence: 97%

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Effects of Palm Leaf Biochar on the Availability of Soil Nutrients, Leaf Nutrient Concentration, and Physiological Characteristics of Melon Plants (Cucumis melo L.) Under Drought Stress

et al. 2020

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To investigate the effect of palm leaf biochar on the element absorption and reduction of drought stress effects in melon plants, an experiment was conducted using a split plot in a randomized complete block design with three replications in two successive years. The main plot contained three levels of drought stress (60%, 85%, and 100% water requirement) and the subplot contained four levels of biochar (0, 150, 300, and 450 g per plant). The results revealed that biochar application reduced the effect of drought stress and thus proline content in plants. Application of 300 g biochar per plant with 100% water requirement increased total chlorophyll by 131% compared to control. The treatment of 450 g biochar per plant with 100% water requirement increased chlorophyll a and b and leaf nitrogen (N), potassium (K), calcium (Ca), and manganese (Mn) content by 169%, 127%, 58%, 65%, 44%, and 48%, respectively, compared to control. The treatment of 450 g biochar per plant increased phosphorus (P) and magnesium (Mg) content of leaves by 20% and 31%, respectively, in comparison with control. The interaction of drought stress and biochar indicated that the treatment of 450 g biochar per plant with 60% of water requirement increased plant iron, zinc, and copper by 60%, 44%, and 66%, respectively, compared to the biochar-free treatment with 100% water requirement. Addition of 450 g biochar per plant and irrigation with 60% of water requirement increased soil N, P, and K by 150%, 13%, and 75%, respectively, compared to the biochar-free treatment with 100% water requirement. The results indicated that the use of biochar can be a successful strategy for improving water use efficiency and reducing drought stress in melon plants.

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Section: Discussionmentioning

confidence: 97%

“…The absorption of available nutrients and water absorption by the plant roots are closely related. Water relations affect all physiological processes associated with the solubility and availability of nutrients (Alam, 1999). Drought stress severely restricts P transfer to the branches (Resnik, 1970).…”

Section: Discussionmentioning

confidence: 99%

Effects of Palm Leaf Biochar on the Availability of Soil Nutrients, Leaf Nutrient Concentration, and Physiological Characteristics of Melon Plants (Cucumis melo L.) Under Drought Stress

et al. 2020

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“…The accumulation of nutrients in the shoots of rice plants under water deficit conditions decreased because of the reduction in mobility and absorption of nutrients. Under water stress conditions, roots are unable to absorb many nutrients from the soil due to decreased root activity, which is associated with decreased water movement toward the roots and slower ion diffusion (Alam, 1999). Sardans and Peñuelas (2004) reported that a 22% reduction in soil moisture decreased the amount of P accumulated in plants by 40%; this reduction mainly occurred because there was no decrease in shoot biomass.…”

Section: Discussionmentioning

confidence: 99%

Selenium protects rice plants from water deficit stress

Andrade

Silva

Guimarães

et al. 2018

Ecotoxicology and Environmental Safety

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Selenium (Se) is essential to humans and animals due to its antioxidant properties. Although it is not considered an essential nutrient for higher plants. Many studies show that Se in low concentrations (up to 0.5 mg kg) provides beneficial effects to non-hyperaccumulating plants by participating in antioxidant defense systems and enhancing tolerance to abiotic stress. Therefore, this study aimed to evaluate the effects of Se application rates on rice plants under different soil water conditions. The experiment was conducted on an Oxisol using four Se rates (0, 0.5, 1.0 and 2.0 mg kg) and two soil water conditions (irrigated and water deficit). Selenium application via soil up to 0.5 mg kg increased the plant height, chlorophyll index, sulfur and copper accumulation in shoots, carbon dioxide assimilation, superoxide dismutase (EC 1.15.1.1) activity and decreased the hydrogen peroxide concentration in rice leaves. The accumulation of Se in shoot biomass and Se concentration in seeds increased linearly with the applied rates. Water deficit strongly decreased the plant growth and yield. However, rice plants treated with Se showed higher net photosynthesis, water use efficiency and antioxidant system. This study provides useful information about the roles of Se in protecting rice plants from water deficit stress.

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“…In contrast, the Mg, Cu, Zn, Mn and Fe concentrations have increased in inoculated seedlings by A. alternata, grown under salt stress (combined stress). In fact, Mg as a component of chlorophyll, Fe as a component of ferridoxin and cytochromes; Zn as a component of glutamic, alcohol and lactic dehydrogenase, and carbonic anhydrase; Cu as a component of laccase, cytochrome oxidase, ascorbic acid oxidase, and polyphenol oxidase; and Mn as a component of arginase and phosphotransferase, may be mobilized and utilized by plants and may be influenced by the adverse or favorable environmental growth conditions (Manzoor Alam, 1999;Sogoni et al, 2021). The improvement in the absorption of Mg and Fe can contribute to the maintenance of energy transfer integrity and protein synthesis.…”

Section: Discussion Discussion Discussionmentioning

confidence: 99%

Comparative study of the effect of salt stress, Alternaria alternata attack or combined stress on the Cakile maritima growth and physiological performance

Chalbi

Sghaier-Hammami

Baazaoui

et al. 2021

Not Bot Horti Agrobo

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Cakile maritima is a halophytic plant model that is well known by its ability to tolerate high salt concentrations. Salinity was reported to improve the tolerance of halophytes to several abiotic stresses; however, the involvement of salt in the tolerance to biotic stress is still scant. In the present work, the effect of salt on C. maritima responses towards the pathogenic Alternaria alternata was investigated. For that, C. maritima seeds were germinated for four weeks. Plants were then divided into four groups: i) Plants irrigated with salt (200mM NaCl); ii) Plants infested by fungus; iii) Plants irrigated with salt and infested by fungus and finally control plants (0mM NaCl, without inoculation). Our results showed that upon salt stress or fungal attack, plants reduced biomass production, hydration status and photosynthetic performance which were associated with a decrease in the gas exchange and chlorophyll fluorescence parameters, with a more pronounced effect upon fungal attack. However, under combined stress, a significant increase of these parameters was noticed, with a level close to that of control. Concerning nutrient contents, K, Zn, Fe, Cu and Mg decreased in the C. maritima leaves exposed to both stresses applied individually. In contrast, all these nutrients were increased in plants grown under combined stress. Taken together, we can conclude that plants grown under combined stresses had better growth rate and physiological performance compared to all other treated plants, and that salt may be the key in improving the C. maritima ability to tolerate fungal attack.

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Nutrient Uptake by Plants Under Stress Conditions

Cited by 124 publications

References 168 publications

Effects of Palm Leaf Biochar on the Availability of Soil Nutrients, Leaf Nutrient Concentration, and Physiological Characteristics of Melon Plants (Cucumis melo L.) Under Drought Stress

Effects of Palm Leaf Biochar on the Availability of Soil Nutrients, Leaf Nutrient Concentration, and Physiological Characteristics of Melon Plants (Cucumis melo L.) Under Drought Stress

Selenium protects rice plants from water deficit stress

Comparative study of the effect of salt stress, Alternaria alternata attack or combined stress on the Cakile maritima growth and physiological performance

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