Influence of aluminium on plant growth and mineral nutrition of barley

Alam, S. M.

doi:10.1080/00103628109367134

Cited by 28 publications

(18 citation statements)

References 20 publications

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“…Reduction of Al toxicity by supplying adequate soil moisture could be due to: (a) increased accessibility of Al-injured roots to water; and/or (b) increased uptake and transport of essential elements such as Ca, F, and Mg (1,24).…”

Section: Discussionmentioning

confidence: 99%

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Role of water stress in differential aluminum tolerance of two barley cultivars grown in an acid soil

Krizek¹,

Foy²

1988

Journal of Plant Nutrition

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Two cultivars of barley (Hordeum vulgare L.), Al-sensitive 'Dayton' and Al-tolerant 'Kearney', were grown under controlled environmental conditions to determine the influence of Al stress and water stress imposed separately and in combination with one another. Plants were grown for 4 weeks in polyethylene-lined, waxed cartons containing 1 kg of acid, Al-toxic, Tatum subsoil (clayey, mixed, thermic, Typic Hapludult) at high (pH 4.7) or low (pH 6.6) Al stress. During the final 2 weeks they were also subjected to low (-20 to -40 kPa) or high (-60 to -80 kPa) water stress. Under low water stress, little difference in the growth

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Section: Discussionmentioning

confidence: 99%

“…Water stress (2,3,4,19,21,25,26,38) and aluminum toxicity (1,5,6,8,16,18,20,28,29,30,31,32) impose major constraints to plant growth in many parts of the world. Aluminum stress effects are particularly serious in sub-surface soils that have a pH below 5.5 and are difficult to lime.…”

Section: Introductionmentioning

confidence: 99%

Role of water stress in differential aluminum tolerance of two barley cultivars grown in an acid soil

Krizek¹,

Foy²

1988

Journal of Plant Nutrition

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“…Al toxicity inhibits root cell division and elongation, thus reducing water and nutrient uptake, consequently resulting in poorer plant growth and yield (Alam, 1981;Clarkson, 1966;Foy, 1983;Foy et al, 1967;Gauthier, 1953;Reid et al, 1969;1971). Relative shoot and root dry weights in tolerant barley cultivars were two-fold and three-fold respectively compared to susceptible cultivars (Foy, 1996).…”

Section: Effect Of Al Toxicity On Plant Growth and Developmentmentioning

confidence: 99%

Aluminium tolerance in barley (Hordeum vulgare L.): Physiological mechanisms, genetics and screening methods

Wang

Raman

Zhang

et al. 2006

J. Zhejiang Univ. - Sci. B

120

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Aluminium (Al) toxicity is one of the major limiting factors for barley production on acid soils. It inhibits root cell division and elongation, thus reducing water and nutrient uptake, consequently resulting in poor plant growth and yield. Plants tolerate Al either through external resistance mechanisms, by which Al is excluded from plant tissues or internal tolerance mechanisms, conferring the ability of plants to tolerate Al ion in the plant symplasm where Al that has permeated the plasmalemma is sequestered or converted into an innocuous form. Barley is considered to be most sensitive to Al toxicity among cereal species. Al tolerance in barley has been assessed by several methods, such as nutrient solution culture, soil bioassay and field screening. Genetic and molecular mapping research has shown that Al tolerance in barley is controlled by a single locus which is located on chromosome 4H. Molecular markers linked with Al tolerance loci have been identified and validated in a range of diverse populations. This paper reviews the (1) screening methods for evaluating Al tolerance, (2) genetics and (3) mechanisms underlying Al tolerance in barley.

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“…Aluminum toxicity inhibits root cell division and elongation, thus reducing water and nutrient uptake and grain yield (Reid, 1971;Alam, 1981;Foy, 1983). Reduced drought tolerance, winter hardiness, and disease resistance have been indirectly associated with Al toxicity (Foy, 1984;Krizek & Foy, 1988).…”

Section: Análise Genética Da Tolerância Ao Alumínio Em Cevadas Brasilmentioning

confidence: 99%

Genetic analysis of aluminum tolerance in Brazilian barleys

Minella

Sorrells

2002

Pesq. agropec. bras.

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-Aluminum (Al) toxicity is a major factor limiting barley growth in acid soils, and genotypes with adequate level of tolerance are needed for improving barley adaptation in Brazil. To study the inheritance of Al tolerance in Brazilian barleys, cultivars Antarctica 1, BR 1 and FM 404 were crossed to sensitive Kearney and PFC 8026, and intercrossed. Parental, F 1 , F 2 and F 6 generations were grown in nutrient solution containing 0.03, 0.05 and 0.07 mM of Al and classified for tolerance by the root tip hematoxylin staining assay. Tolerant by sensitive F 2 progenies segregated three tolerant to one sensitive, fitting the 3:1 ratio expected for a single gene. The F 6 populations segregated one tolerant to one sensitive also fitting a monogenic ratio. The F 2 seedlings from crosses among tolerant genotypes scored the same as the parents. Since the population size used would allow detection of recombination as low as 7%, the complete absence of Al sensitive recombinants suggests that tolerance in these cultivars is most probably, controlled by the same gene. Thus, the potential for improving Al tolerance through recombination of these genotypes is very low and different gene sources should be evaluated.Index terms: Hordeum vulgare, genotypes, genetic inheritance, toxicity. Análise genética da tolerância ao alumínio em cevadas brasileirasResumo -A toxicidade do alumínio (Al) é um dos principais limitantes ao crescimento da cevada em solos ácidos, e são necessários genótipos com adequada tolerância para melhorar a adaptação da espécie no Brasil. Para estudar a herança da tolerância ao Al em cevadas brasileiras, as cultivares Antarctica 1, BR 1 e FM 404 foram cruzadas com Kearney e PFC 8026 e intercruzadas entre si. Progenitores e gerações F 1 , F 2 e F 6 foram cultivados em solução nutritiva contendo 0,03, 0,05 e 0,07 mM de Al, e classificadas quanto à tolerância, pelo método de coloração com hematoxilina. As progênies F 2 , das cruzas tolerante x suscetível, segregaram na proporção de três tolerantes para uma suscetível, enquadrando-se na proporção 3:1 esperada no modelo monogênico. As populações F 6 segregaram uma tolerante para uma suscetível, enquadrando-se no modelo de um gene. Nos cruzamentos entre tolerantes, as F 2 apresentaram reação igual à dos progenitores. Como o tamanho de população usado permitiria detectar recombinações de 7% na hipótese de mais de um gene ligados em repulsão, a ausência completa de segregantes suscetíveis sugere que a tolerância destas cultivares seja condicionada pelo mesmo gene. Desta maneira, o potencial para melhoria da tolerância ao Al por meio da recombinação destas cultivares é muito baixo, e devem ser pesquisadas fontes diferentes.Termos para indexação: Hordeum vulgare, genótipos, herança genética, toxicidade.

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Influence of aluminium on plant growth and mineral nutrition of barley

Cited by 28 publications

References 20 publications

Role of water stress in differential aluminum tolerance of two barley cultivars grown in an acid soil

Role of water stress in differential aluminum tolerance of two barley cultivars grown in an acid soil

Aluminium tolerance in barley (Hordeum vulgare L.): Physiological mechanisms, genetics and screening methods

Genetic analysis of aluminum tolerance in Brazilian barleys

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