Morphological changes in the apex of pea roots during and after recovery from aluminium treatment

Motoda, Hirotoshi; Kano, Yoshio; Hiragami, Fukumi; Kawamura, Kenji; Matsumoto, Hideaki

doi:10.1007/s11104-010-0318-1

Cited by 30 publications

(29 citation statements)

References 35 publications

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“…The ruptures in the root tip obser ved in both maize genotypes were similar to those observed in pea (Yamamoto et al 2001;Motoda et al 2010Motoda et al , 2011, cowpea (Kopittke et al 2008) and maize roots (Jones et al 2006). These transverse ruptures may apparently be caused by the increase in root diameter and the tearing of external cortex and rhizodermic cells of the elongation zone (Blamey et al 2004;Kopittke et al 2008;Motoda et al 2010).…”

Section: Resultssupporting

confidence: 77%

“…These transverse ruptures may apparently be caused by the increase in root diameter and the tearing of external cortex and rhizodermic cells of the elongation zone (Blamey et al 2004;Kopittke et al 2008;Motoda et al 2010). According to these authors, root elongation inhibition and rupturing is the result of Al linkage to cell wall components and increased lignin biosynthesis and cell wall rigidity.…”

Section: Resultsmentioning

confidence: 99%

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Effects of aluminum on the elongation and external morphology of root tips in two maize genotypes

et al. 2015

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Section: Resultssupporting

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Effects of aluminum on the elongation and external morphology of root tips in two maize genotypes

et al. 2015

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“…Following this, the constant detachment of PA cells, akin to lateral root cap cells, could facilitate the replacement of the Al-damaged outer cells by the expanding epidermis cells. A shield effect of PA cells in the expansion of the inner epidermis cells is supported by the previous idea that crack formation in the early stage of Al toxicity is presumably caused by the differential expansion between Al-arrested epidermis cells and still-expanding cortex cells (Yamamoto et al, 2001;Motoda et al, 2010).…”

Section: Discussionsupporting

confidence: 54%

Transient Proliferation of Proanthocyanidin-Accumulating Cells on the Epidermal Apex Contributes to Highly Aluminum-Resistant Root Elongation in Camphor Tree

et al. 2010

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Aluminum (Al) is a harmful element that rapidly inhibits the elongation of plant roots in acidic soils. The release of organic anions explains Al resistance in annual crops, but the mechanisms that are responsible for superior Al resistance in some woody plants remain unclear. We examined cell properties at the surface layer of the root apex in the camphor tree (Cinnamomum camphora) to understand its high Al resistance mechanism. Exposure to 500 mM Al for 8 d, more than 20-fold higher concentration and longer duration than what soybean (Glycine max) can tolerate, only reduced root elongation in the camphor tree to 64% of the control despite the slight induction of citrate release. In addition, Al content in the root apices was maintained at low levels. Histochemical profiling revealed that proanthocyanidin (PA)-accumulating cells were present at the adjacent outer layer of epidermis cells at the root apex, having distinctive zones for cell division and the early phase of cell expansion. Then the PA cells were gradually detached off the root, leaving thin debris behind, and the root surface was replaced with the elongating epidermis cells at the 3-to 4-mm region behind the tip. Al did not affect the proliferation of PA cells or epidermis cells, except for the delay in the start of expansion and the accelerated detachment of the former. In soybean roots, the innermost lateral root cap cells were absent in both PA accumulation and active cell division and failed to protect the epidermal cell expansion at 25 mM Al. These results suggest that transient proliferation and detachment of PA cells may facilitate the expansion of epidermis cells away from Al during root elongation in camphor tree.

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“…The roots of plants under Al 3+ stress become atrophied, brittle, thinly branched, have increased cell wall stiffness and thickness, and undergo changes in membrane transport proteins (Meriga et al, 2010;Motoda et al, 2010;Sun et al, 2010;Garzon et al, 2011;Guo et al, 2012). Consequently, the roots become inefficient in the uptake of water and nutrients (Mendonça et al, 2003;Freitas et al, 2006;Guo et al, 2007;Famoso et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Aluminum in mineral nutrition of upland rice plants

Freitas¹,

Fernandes

Maia

et al. 2017

Agraria

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Although upland rice plants have been historically considered to be tolerant to aluminum, they may have their growth prevented or decreased when cultivated on aluminum soils, besides having their uptake of water and nutrients negatively influenced. Thus, the objective of this work was to evaluate the content and accumulation of macro and micronutrients in upland rice plants submitted to aluminum toxicity. The experimental design chosen was the randomized block design, with four replications; and the treatments were five doses of aluminum (0; 370; 740; 1100 and 1480 μmol L -1 ). The evaluations conducted were on the content and accumulation of macro and micronutrients in the shoot and root of the plants. Due to the interaction between aluminum and calcium, the decrease in calcium content and accumulation are the most important effects caused by aluminum on the mineral nutrition of upland rice plants. Aluminum has a high negative influence on mineral nutrition of upland rice plants, especially at its roots.Key words: accumulation; Oryza sativa L.; nutrient solution; toxicity Alumínio na nutrição mineral de plantas de arroz de terras altas RESUMO Apesar de plantas de arroz de terras altas serem historicamente consideradas tolerantes ao alumínio, estas podem ter seu crescimento impedido ou diminuído no cultivo em solos com alumínio, além de influenciar negativamente sua absorção de água e nutrientes. Assim, o objetivo do trabalho foi avaliar o teor e acúmulo de macro e micronutrientes em plantas de arroz de terras altas submetidas a toxidez por alumínio. O delineamento experimental foi o de blocos casualizados, com quatro repetições; e os tratamentos foram cinco doses de alumínio (0; 370; 740; 1100 e 1480 μmol L -1 ). As avaliações realizadas foram teor e acúmulo de macro e micronutrientes na parte aérea e raiz das plantas. Devido a interação entre alumínio e cálcio, o decréscimo no teor e acúmulo de cálcio são os efeitos mais importantes causados pelo alumínio na nutrição mineral das plantas de arroz de terras altas. O alumínio tem alta influência negativa na nutrição mineral de plantas de arroz de terras altas, especialmente em suas raízes.Palavras-chave: acúmulo; Oryza sativa L.; solução nutritiva; toxidez 1 Faculdade La Salle, Lucas do Rio Verde,

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Morphological changes in the apex of pea roots during and after recovery from aluminium treatment

Cited by 30 publications

References 35 publications

Effects of aluminum on the elongation and external morphology of root tips in two maize genotypes

Effects of aluminum on the elongation and external morphology of root tips in two maize genotypes

Transient Proliferation of Proanthocyanidin-Accumulating Cells on the Epidermal Apex Contributes to Highly Aluminum-Resistant Root Elongation in Camphor Tree

Aluminum in mineral nutrition of upland rice plants

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