Methodology adjustments for organic acid tolerance studies in oat under hydroponic systems

Köpp, Maurício Marini; Luz, Viviane Köpp da; Souza, Velci Queiróz de; Sousa, Rogério Oliveira de; Carvalho, Fernando Irajâ Félix de; Oliveira, Antônio Costa de

doi:10.1590/s1516-89132009000300003

Cited by 4 publications

(5 citation statements)

References 15 publications

(18 reference statements)

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“…Considering the acetic acid at 12 mM, a significant correlation was observed, again between the variables RL and % GER (0.83; Table 2). Significant correlations were registered between RL and SL in oats and rice seedlings subjected to stress with a mixture of acetic, butyric and propionic acids in hydroponic system (Kopp et al, 2009b;. In the present study these variables were not correlated.…”

Section: Resultscontrasting

confidence: 74%

“…These soils, when combined with vegetable residues resulting from the no-tillage management, favor the production of organic acids (Kopp et al, 2009b;Sousa and Bortolon, 2002). Even in non-hydromorphic soils, under excessive moisture upon planting in the no-till system, the wet straw can be allocated in the same depth of the seed, and during its decomposition, the formation of acids can affect the development of seedlings (Lynch, 1986).…”

Section: Introductionmentioning

confidence: 99%

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Resposta de plântulas de aveia ao estresse por ácidos acético e butírico

et al. 2014

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White oat is an excellent alternative winter crop for crop rotation systems. The decomposition of organic matter retained on the soil in no-till conditions associated with poor drainage or excessive moisture increase the formation of organic acids, including acetic and butyric acids, with high phytotoxic potential. This study aimed to evaluate the effect of acetic and butyric acids on germination and early seedling development of different oat cultivars. The experiment was a completely randomized block design, where seeds of the cultivars Afrodite, Albasul, Brisasul, FAEM 06, IAC 7, URS 21 and URS Taura, were subjected to four levels of acetic (0, 4, 8 and 12 mM) and butyric (0, 3, 6 and 9 mM) acids. Seeds were kept in a germination chamber for ten days. The traits evaluated were: shoot length (SL), root length (RL), and germination percentage (% GER). Butyric acid was more toxic than acetic acid, impairing more root development than shoot length. The cultivars IAC 7 and Brisasul were more sensitive and the cultivars URS Taura and Afrodite were tolerant to the organic acids studied. In the control and in the treatment with 12 mM acetic acid, we found correlation between RL and %GER. There is a large variation among cultivars in response to acetic and butyric acids.Key words: phytotoxicity, Avena sativa, germination, root, shoot. Resposta de plântulas de aveia ao estresse por ácidos acético e butíricoResumo A aveia branca é uma excelente opção como cultura de inverno em sistemas de sucessão de culturas. A decomposição do material orgânico, mantido na superfície do solo no plantio direto, associado a condições de má drenagem ou umidade excessiva, acentua a formação de ácidos orgânicos. Dentre estes, os ácidos acéticos e butírico apresentam grande potencial fitotóxico. O objetivo do trabalho foi avaliar o efeito dos ácidos acético e butírico na germinação e no desenvolvimento inicial de plântulas de diferentes cultivares de aveia branca. O experimento foi conduzido em blocos completamente casualizados, onde sementes das cultivares Afrodite, Albasul, Brisasul, FAEM 06, IAC 7, URS 21 e URS Taura foram embebidas em quatro doses de ácido acético (0, 4, 8 e 12 mM) e butírico (0, 3, 6 e 9 mM). As sementes foram mantidas em câmera de germinação por dez dias. Foram avaliados os caracteres comprimento da parte aérea (CPA), comprimento de raiz (CR) e a porcentagem de germinação (% GER). O ácido butírico demonstrou-se mais fitotóxico que o ácido acético, sendo o desenvolvimento das raízes mais afetado que a parte aérea. As cultivares IAC 7 e Brisasul demonstraram-se mais sensíveis e as cultivares URS Taura e Afrodite demonstraram-se menos afetadas pelos ácidos orgânicos em estudo. Sem a adição de ácidos e na dose de 12 mM de ácido acético, verificou-se a correlação entre % GER e CR. Existe grande variabilidade entre as cultivares estudadas, em resposta aos ácidos acético e butírico.

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Section: Resultscontrasting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Resposta de plântulas de aveia ao estresse por ácidos acético e butírico

et al. 2014

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“…The data were subjected to the analysis of variance, considering the factors Al 3+ levels and fixed genotypes, followed by regression adjustment and Spearman correlation analysis among the evaluated variables, according to the methodology proposed by [55]. All tests were performed with SAS statistical software [56].…”

Section: Methodsmentioning

confidence: 99%

Performance of tetraploid alfalfa genotypes as exposed to aluminum toxicity

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Köpp²,

Lédo³

2012

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A study was carried out to evaluate the development of 12 tetraploid alfalfa cultivars exposed to Al toxicity in nutrient solution. Newly germinated seedlings of cultivars Alfa 200, Alto, Araucana, Costera, Crioula, Esmeralda, Falcon, F-708, Rio, Romagnola, Valley Plus, and Victoria, were exposed to either 0, 4, 8 or 12 mg·L-1 Al3+. Plants were analyzed regarding root length (RL) and dry matter (RDM), aerial part length (APL), and dry matter (APDM), hypocotyl length (HypL) and dry matter (HypDM), epicotyl length (EpiL) and dry matter (EpiDM), and petiole length (PetL), and dry matter (PetDM). Results indicated that, although all genotypes exhibited detectable sensitivity to such a stress, cvs. Crioula, Victoria and Alpha-200 were tolerant to 4 mg·L-1 Al3+ toxicity. It was also concluded that Al3+ levels up to the 4 mg·L-1 will be effective for screening tetraploid alfalfa genotypes regarding this type of stress, when evaluations are made in nutrient solution. Finally, RL is the most suitable variable for conducting such evaluations, but all variables related to dry matter in the aerial part are also recommended

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“…Besides no tillage practices, Southern Brazil has areas with hydromorphic soils characterized by low natural drainage (KOPP et al 2009). In these soils, due to their low level of oxygen, the decomposition of organic matter is mostly anaerobic, leading to reductions that produce phytotoxic substances such as acetic, butyric and propionic acids (TUNES et al 2013).…”

Section: Introductionmentioning

confidence: 99%