Comparative physiology of elemental distributions in plants

Conn, Simon J.; Gilliham, Matthew

doi:10.1093/aob/mcq027

Cited by 285 publications

(261 citation statements)

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“…The -P microanalysis values are related to the low total concentration of that nutrient in needles (Table 2). Unlike the present study where there was no variation among the specialized tissues, Conn and Gilliham (2010) reported that monocots accumulate P in the mesophyll, while dicots accumulate P in the epidermis. In addition, -P was the only treatment in which this element was not detected in the spongy mesophyll and abaxial epidermis (Figure 2a).…”

Section: Elemental Distribution In Epidemis and Mesophyllcontrasting

confidence: 99%

“…These results indicate that in palisade mesophyll there is a greater accumulation of organic molecules containing S. Likewise, Mastroberti and Mariath (2003) reported an accumulation of phenolic compounds and a large number of chloroplasts in A. angustifolia; both generally contain S in their composition. Conn and Gilliham (2010) also reported higher S concentrations in the mesophyll compared to the epidermis of monocot and dicot leaves.…”

Section: Elemental Distribution In Epidemis and Mesophyllmentioning

confidence: 86%

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SOIL FERTILITY AFFECTS ELEMENTAL DISTRIBUTION IN NEEDLES OF THE CONIFER Araucaria angustifolia: A MICROANALYTICAL STUDY

Barbosa

Constantino

Zanette

et al. 2017

CERNE

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Araucaria angustifolia is a conifer species found in South American subtropical forests that comprises less than 3% of the native vegetation and little is known concerning the accumulation of nutritional elements in its needles. In this study, scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS) was used to assess the elemental distribution in needles. Needles were selected from 28 month-old plants grown in a fertilization experiment supplied with: 1) N, P, and K; 2) N and P; and 3) N and K. In microanalysis, four types of specialized needle tissues (adaxial epidermis, palisade mesophyll, spongy mesophyll and abaxial epidermis) were evaluated for elemental composition (C, O, P, K, Ca, S and Al). When crystals were detected, the concentrations of 12 elements were determined (C, O, P, K, Ca, S, Al, Fe, Mg, Na, Si, and Cl). Under low soil P and K, these elements were found in low concentrations in the epidermis, mesophyll, and crystals. Under low soil P, Ca and K accumulated in the spongy mesophyll, while under low soil K only Ca accumulated in this tissue. In addition, low soil P or K availability favored the formation of crystals; crystals under low soil K availability had more Ca and Mg. Soil P and K availability affected the distribution of elements in needles of A. angustifolia, in that type of tissue and formation of crystals were key to the nutrient dynamics in needles.

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Section: Elemental Distribution In Epidemis and Mesophyllcontrasting

confidence: 99%

Section: Elemental Distribution In Epidemis and Mesophyllmentioning

confidence: 86%

SOIL FERTILITY AFFECTS ELEMENTAL DISTRIBUTION IN NEEDLES OF THE CONIFER Araucaria angustifolia: A MICROANALYTICAL STUDY

Barbosa

Constantino

Zanette

et al. 2017

CERNE

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“…8,10,19,23,33 Higher Cd accumulation in roots than leaves suggest that Cd transport to the xylem is restricted, therefore less in above ground parts, suggesting that Cd is not readily translocated in the phloem. 6,34,35 Furthermore, Cd accumulation in the root and leaf also depends on binding to the extracellular matrix. 36 It has also been reported that Cd accumulation by plants grown in soil is directly related to transpiration and thereby to stomatal conductance.…”

Section: Introductionmentioning

confidence: 99%

Differential cadmium stress tolerance in five Indian mustard (Brassica junceaL.) cultivars

Gill

Khan

Tuteja

2011

Plant Signaling & Behavior

135

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IntroductionAgricultural soils worldwide are slightly to moderately contaminated with toxic heavy metals that restrict the crop plants to reach their full genetic potential and cause significant loss by reducing the crop productivity. 1 Among heavy metals, Cd is a non-essential and most deleterious heavy metal pollutant commonly released into the arable soil from various industrial, mining and farming practices, 2 and has been ranked No. 7 among the top 20 toxins which affect the human health by entering in the food chain. 3,4 Although Cd is a highly phytotoxic metal, it is easily taken up by plant roots growing on Cd-contaminated soils and transported to above ground plant parts. 5-7 The regulatory limit of Cd in agricultural soils is 100 mg Cd kg -1 soil, 8 but this threshold is continuously increasing because of anthropogenic and industrial activities. Plants growing on Cd contaminated soil result in Cd accumulation in all plant parts, which inhibits plant growth, affect nutrient uptake, alters the chloroplast ultrastructure, inactivates enzymes of CO 2 fixation, inhibits photosynthesis and induces lipid peroxidation and antioxidant machinery. 4,[9][10][11] However, Cd is a non redox-active metal, but it induces the generation of reactive oxygen species (ROS) including superoxide radical (O 2•-), hydrogen peroxide (H 2 O 2 ) and hydroxyl radicalThe presence of cadmium (cd) in the agricultural soils affects horticultural cultivars and constrains the crop productivity. a pot experiment was performed using five cultivars of mustard (Brassica juncea L.) to evaluate the difference in their response to cd toxicity under greenhouse conditions. The pots containing reconstituted soil were supplied with different concentration of cdcl 2 (0, 25, 50, 100 or 150 mg cd kg -1 soil). Increasing concentration of cd in the soil resulted in decreased growth, photosynthesis and yield. Maximum significant reduction in growth, photosynthesis and yield were observed with 150 mg cd kg -1 soil in all the cultivars. Our results indicate that the cultivar alankar is found to be more tolerant to cd stress, recording higher plant dry mass, net photosynthesis rate, associated with high antioxidant activity and low cd content in the plant leaves and thus less oxidative damage. cultivar rh30 experienced maximum damage in terms of reduction in growth, photosynthesis, yield characteristics and oxidative damage and emerged as sensitive cultivar. The data of tolerance index of alankar were found to be higher among all tested mustard cultivars which indicate its higher tolerance to cd. Better coordination of antioxidants protected alankar from cd toxicity, whereas lesser antioxidant activity in rh30 resulted in maximum damage. cultivars of mustard were ranked with respect to their tolerance to cd: alankar > Varuna > Pusa Bold > Sakha > rh30, respectively.Differential cadmium stress tolerance in five indian mustard (Brassica juncea L.) cultivars

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“…1 For instance, it is generally observed that phosphate and calcium (Ca) do not co-localize to high concentrations in the same cell vacuole; if they did it would be expected that a large proportion of both elements would exist as insoluble calcium phosphate. 1 In contrast, magnesium (Mg), potassium (K), chloride and nitrate may share similar cellular locations but can be at very different concentrations in different cells. 1,2 Furthermore, the cellular location of a particular element is robust within an individual plant, but the cell-type that accumulates each element can vary between species.…”

Section: Introductionmentioning

confidence: 99%

Cell-specific compartmentation of mineral nutrients is an essential mechanism for optimal plant productivity— another role forTPC1?

Gilliham

Athman

Tyerman

et al. 2011

Plant Signaling & Behavior

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Comparative physiology of elemental distributions in plants

Cited by 285 publications

References 283 publications

SOIL FERTILITY AFFECTS ELEMENTAL DISTRIBUTION IN NEEDLES OF THE CONIFER Araucaria angustifolia: A MICROANALYTICAL STUDY

SOIL FERTILITY AFFECTS ELEMENTAL DISTRIBUTION IN NEEDLES OF THE CONIFER Araucaria angustifolia: A MICROANALYTICAL STUDY

Differential cadmium stress tolerance in five Indian mustard (Brassica junceaL.) cultivars

Cell-specific compartmentation of mineral nutrients is an essential mechanism for optimal plant productivity— another role forTPC1?

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