A balanced polymorphism in biomass resource allocation controlled by phosphate in grasses screened through arsenate tolerance

Khan, B. M.; Deacon, Claire; Meharg, Caroline; Norton, Gareth J.; Johnson, David; Meharg, Andrew A.

doi:10.1016/j.envexpbot.2013.09.008

Cited by 6 publications

(12 citation statements)

References 31 publications

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“…Accumulation of As mainly occurs in the root system in plants, and in the aboveground organs to a lesser degree (Stoeva et al, 2005;Khan et al, 2013;Meharg et al, 2014). As interrupts the biochemical function of cells and severely impedes different plant metabolic processes including transpiration, respiration, photosynthesis etc., by reacting with proteins and enzymes which culminates in stunted plant growth (Meharg and Hartley-Whitaker, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Plants must take up sufficient amount of P to balance excessive As for the alleviation of As toxicity. The plants react to As exposure by increasing P accumulation (Burlo et al, 1999;Leimu and Fischer, 2008;Khan et al, 2013;Khan et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Since As is a phosphate analogue, phosphate transporters transports As which results in competition between P and As for uptake at the level of membrane transport. Accordingly, P is expected to reduce arsenate influx resulting ultimately into an observed increase in arsenate tolerance under phosphate addition (Ullrich-Eberius et al, 1989;Meharg and Macnair, 1990;Khan et al, 2013;Meharg et al, 2014). Studies, especially in hydroponic environments, have demonstrated that non-resistant plants can be made more resistant to arsenate by raising their P status, as the P is taken more effectively compared to arsenate (Meharg and Macnair, 1992b;Lee et al, 2003;Khan et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Accordingly, P is expected to reduce arsenate influx resulting ultimately into an observed increase in arsenate tolerance under phosphate addition (Ullrich-Eberius et al, 1989;Meharg and Macnair, 1990;Khan et al, 2013;Meharg et al, 2014). Studies, especially in hydroponic environments, have demonstrated that non-resistant plants can be made more resistant to arsenate by raising their P status, as the P is taken more effectively compared to arsenate (Meharg and Macnair, 1992b;Lee et al, 2003;Khan et al, 2013). Increasing cytoplasmic phosphate concentration in wheat also demonstrated the role of phosphate against As toxicity (Meharg, 1994).…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, phosphorus (P) -an essential plant nutrient that regulates cellular energy transfer, respiration, and photosynthesis (Marschner, 1995) -is a chemical analogue of As (Raghothama, 1999;Khan et al, 2013;Meharg et al, 2014). Therefore, in plant uptake of nutrients, P contests As due to their chemical similarity (Meharg and Macnair, 1992ab;Lee et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Phosphorus on In-vitro Seed Germination and Seedling Growth of Brassica rapa L. in Arsenic Condition

Khan¹,

Afrin²,

Hossain³

2019

CMUJNS

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Arsenic (As) is a toxic metalloid widely distributed in the environment posing threat to human health. Enriching the soil with phosphorus (P) in As condition is believed to reduce the uptake of As in plants. But, it is not clear whether this uptake changes affect the growth behaviors of plant or not. Therefore, this study was conducted to determine the efficacy of P in balancing the negative effects of As on Brassica rapa. Seeds of B. rapa were treated with different concentrations of As, with or without addition of P. As exposure hindered seed germination and seedling growth at different magnitudes depending on the level of concentrations. However, addition of P in As solution culture improved the seed germination and seedling growth significantly. Germination were 87% in T2 (2 ppm As + 10 ppm P), 78% in T4 (5 ppm As + 10 ppm P) and 68% in T6 (10 ppm As + 10 ppm P) compared to 82% in T1 (2 ppm As), 73% in T3 (5 ppm As) and 61% in T5 (10 ppm As).In treatments T1, T3 and T5, seedling dry biomasses were 26 mg, 15 mg and 12 mg respectively, which were enhanced to 31 mg, 21 mg and 16 mg respectively in T2, T4 and T6. Similar trend was also recorded for plumule and radical growth, seedling vigor, sturdiness etc. Therefore, this study recommended the application of P to reduce the negative effects of As on B. rapa in As solution culture and maintains that the results may hold good in the field.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of Phosphorus on In-vitro Seed Germination and Seedling Growth of Brassica rapa L. in Arsenic Condition

Khan¹,

Afrin²,

Hossain³

2019

CMUJNS

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Arbuscular mycorrhiza: advances and retreats in our understanding of the ecological functioning of the mother of all root symbioses

Kuyper

Jansa

2023

Plant Soil

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Background Arbuscular mycorrhizal (AM) symbiosis has been referred to as the mother of all plant root symbioses as it predated the evolution of plant roots. The AM research is a multidisciplinary field at the intersection of soil science, mycology, and botany. However, in recent decades the nature and properties of soils, in which the AM symbiosis develops and functions, have received less attention than desired. Scope In this review we discuss a number of recent developments in AM research. We particularly cover the role of AM symbiosis in acquisition of phosphorus, nitrogen, heavy metals and metalloids, as well as water by plants from soil; mycorrhizal effects on plant nutritional stoichiometry and on the carbon cycle; the hyphosphere microbiome; so-called facultative mycorrhizal plants; explanations for lack of mycorrhizal benefit; common mycorrhizal networks; and arbuscular and ectomycorrhizal ecosystems. Conclusion We reflect on what has previously been described as mycorrhizal ‘dogmas’. We conclude that these are in fact generalisations on the AM symbiosis that are well supported by multiple studies, while admitting that there potentially is a geographical bias in mycorrhizal research that developed in temperate and boreal regions, and that research in other ecosystems might uncover a greater diversity of viable mycorrhizal and non-mycorrhizal strategies than currently acknowledged. We also note an increasing tendency to overinterpret data, which may lead to stagnation of some research fields due to lack of experiments designed to test the mechanistic basis of processes rather than cumulating descriptive studies and correlative evidences.

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Physiological responses of wild grass Holcus lanatus L. to potentially toxic elements in soils: a review

Rahman

Khan

2023

Environ Sci Pollut Res

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A balanced polymorphism in biomass resource allocation controlled by phosphate in grasses screened through arsenate tolerance

Cited by 6 publications

References 31 publications

Effects of Phosphorus on In-vitro Seed Germination and Seedling Growth of Brassica rapa L. in Arsenic Condition

Effects of Phosphorus on In-vitro Seed Germination and Seedling Growth of Brassica rapa L. in Arsenic Condition

Arbuscular mycorrhiza: advances and retreats in our understanding of the ecological functioning of the mother of all root symbioses

Physiological responses of wild grass Holcus lanatus L. to potentially toxic elements in soils: a review

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