2001
DOI: 10.1590/s0006-87052001000300004
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Avaliação De Genótipos De Trigo, De Diferentes Origens, Em Relação À Toxicidade De Alumínio

Abstract: Avaliaram-se, quanto à tolerância à toxicidade de alumínio, 18 linhagens de trigo introduzidas do Centro Internacional de Melhoramento de Milho e Trigo (CIMMYT), México; 18 linhagens obtidas do programa de melhoramento do Instituto Agronômico (IAC), Campinas (SP), e as cultivares IAC-24 e IAC-289, em dois experimentos realizados em laboratório, empregando soluções nutritivas, com seis concentrações de alumínio. Nesses experimentos, utilizaram-se as cultivares BH-1146 (tolerante) e Anahuac (sensível) como contr… Show more

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Cited by 10 publications
(7 citation statements)
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“…Moreover, these findings demonstrate that for a plant to maintain Si uptake in the presence of Al, the Si availability in the solution must be approximately 6.6 times higher than in the absence of Al, since in the treatments without Al (control and +Si), the Cmin of both cultivars averaged 4.8, whereas in the treatments with Al (+Al and +Si + Al) the Cmin values averaged 31.8 ( Table 3). The Alinduced structural damage to the roots also negatively affects water and nutrient uptake by the plants (Mistro et al 2001;Mendonça et al 2003), as observed in this study, in which Al increased the Si Cmin, thereby reducing the plants Si uptake capacity.…”
Section: Discussionsupporting
confidence: 67%
See 1 more Smart Citation
“…Moreover, these findings demonstrate that for a plant to maintain Si uptake in the presence of Al, the Si availability in the solution must be approximately 6.6 times higher than in the absence of Al, since in the treatments without Al (control and +Si), the Cmin of both cultivars averaged 4.8, whereas in the treatments with Al (+Al and +Si + Al) the Cmin values averaged 31.8 ( Table 3). The Alinduced structural damage to the roots also negatively affects water and nutrient uptake by the plants (Mistro et al 2001;Mendonça et al 2003), as observed in this study, in which Al increased the Si Cmin, thereby reducing the plants Si uptake capacity.…”
Section: Discussionsupporting
confidence: 67%
“…Aluminum-induced alterations to the plant cell cause plant roots grown under conditions of Al toxicity to become atrophied and brittle, experience fine-scale changes, and present increased cell wall rigidity and thickness, and changes in membrane transport proteins are also observed (Meharg 1993;Kochian et al 2004;Vitorello et al 2005;Zobel et al 2007;Kopittke et al 2008). Therefore, a root developed in the presence of Al experiences reduced growth and presents less efficient water and nutrient uptake, especially in the deeper soil layers (Mistro et al 2001;Barceló and Poschenrieder 2002;Kochian et al 2004;Mariano and Keltjens 2005;Olivares et al 2009;Silva et al 2010;Freitas et al 2017). Furthermore, as a secondary effect, Al induces less chlorophyll production in the plant shoots and decreases the photosynthetic rate (Zhang et al 2007;Ali et al 2008;Aftab et al 2010;Shen et al 2014).…”
Section: Introductionmentioning
confidence: 99%
“…Na tabela 7, relacionam-se os comprimentos médio das raízes dos vinte genótipos de trigo avaliados, além das cultivares-controle BH-1146 (tolerante) e Anahuac (sensível), após 72 horas de crescimento em solução normal (sem alumínio), que se seguiu a um crescimento em solução-tratamento contendo seis diferentes concentrações de alumínio (Al 3+ ). MISTRO et al (2001), que já haviam reportado à alta sensibilidade dos genótipos introduzidos do México, incluindo a cultivar IAC-370, uma introdução mexicana.…”
Section: Resultsunclassified
“…As determinações obtidas são similares a outros trabalhos desenvolvidos em campo relacionados com tolerância ao alumínio em trigo (Mistro et al, 2001) e milho (Morello et al, 2001), com solos contendo 3,6 cmol c dm -3 (pH 4,3) e 5,2 cmol c dm -3 (pH 4,2) de alumínio trocável respectivamente. A área utilizada é considerada uniforme em termos de acidez, pois tem sido utilizada frequentemente para seleção de genótipos tolerantes ao alumínio em trigo.…”
Section: Resultsunclassified