Ácidos orgânicos na qualidade fisiológica de sementes de arroz

Tunes, Lilian Vanussa Madruga de; Tavares, Lizandro Ciciliano; Meneghello, Géri Eduardo; Fonseca, Daniel Ândrei Robe; Barros, Antônio Carlos Souza Albuquerque; Rufino, Cassyo de Araújo

doi:10.1590/s0103-84782013005000090

Cited by 4 publications

(9 citation statements)

References 11 publications

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“…We observed that the increase in levels did not alter the % GER of the cultivars Afrodite, Albasul, FAEM 06 and IAC 7. In an experiment adopting the same methodology used herein, the authors verified that the percentage of germination of the cultivar UPF 18 was not affected by the stress caused by acetic acid (Tunes et al, 2013). In the field cultivation, seed germination is the most sensitive stage, possibly because the seedling needs to break a barrier formed by soil and plant residues rich in organic acids, which cover the seed layer.…”

Section: Resultsmentioning

confidence: 64%

“…At the maximum level (9 mM), % GER was 13.7% lower than observed in the control, reaching only 79% GER. Reductions in % GER by adding butyric acid have been previously observed in oats and rice; for oats the difference was significant, however less than 5% (Tunes et al, 2008;2013). It is worth mentioning that small differences in% GER, although statistically significant, may not result in yield loss, given the tillering ability of oats.…”

Section: Resultsmentioning

confidence: 67%

“…The cultivars Brisasul and FAEM 06 showed a linear decrease in RL, especially the cultivar Brisasul, which presented a RL of 9.02 cm in the control and 5.12 cm at the maximum level (12 mM). Root growth of rice seedlings was inhibited by acetic acid (Armstrong and Armstrong, 2001;Sousa and Bortolon, 2002). Another study with rice also showed that with higher levels of acetic acid reduces the RL, but low levels (<6.8 mM) allowed a slight increase (Neves et al, 2010).…”

Section: Resultsmentioning

confidence: 94%

“…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%

“…For some oat genotypes, toxicity caused by organic acids have been observed in the early stages of plant development, reducing germination, root growth and seedling height (Kopp et al, 2009a;Lynch, 1978;Tunes et al, 2008). These symptoms are associated with respiration inhibition, with consequent changes in cell division and membrane degradation (Camargo et al, 2001).…”

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: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 67%

Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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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Physiological quality of scarlet eggplant seeds produced in soil contaminated with industrial residues

et al. 2018

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Industrial and organic residues cause environmental impacts at various levels. However, these residues present potential to correct soil acidity and fertility. Considering the possibility of using these alternative sources, the objective of this study was to analyze the quality of scarlet eggplant seeds produced with the use of industrial waste. The experiment was carried out in a greenhouse. We used scarlet eggplant seeds (Solanum gilo), cv. ‘Verde-Claro’, and the soil was Typic Hapludox. The experimental design was randomized blocks, in a factorial distribution (3x4x5), being three soil variations [(pure soil (S), soil + cattle manure (SE) and, soil + sewage sludge (SL)], four corrective treatments [without correction (C1), limestone (C2), steel slag (C3) and marble powder (C4)], and five periods of seed storage (0, 100, 120, 140 and 160 days). The use of steel slag and marble powder associated with the addition of sewage sludge and cattle manure increased fresh mass of plants, at 40%, and dry mass of plants, at 48%, when compared with the pure soil. After 140 day of storage, negatives effects on the vigor of scarlet eggplant seeds could be noticed.

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Initial Establishment and Physiological Performance of Rice as Affected by Ryegrass Mulching Levels

Concenço¹,

Parfitt²,

Thiel³

et al. 2019

IJAERS

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We aimed to evaluate the initial growth and physiological characteristics of rice planted following ryegrass in lowland areas. The experiment was conducted in Capao do Leao, Brazil, in Typic Albaqualf. Ryegrass was planted preceding the experiment installation. Prior to rice planting, the area was burndown with herbicide, when treatments were established: ryegrass plants were cut at 0, 15, 30 or 45 cm above ground, resulting in different mulching levels. Rice was then planted, being managed according to local recommendations for the crop. We evaluated the variation in soil moisture levels, rice establishment in density and seedling height, and physiological parameters: relative fluorescence, chlorophyll, flavonoid a nd nitrogen balance indexes. High mulching levels by ryegrass allowed rice five additional days on a dry season, before harmful soil water tension, compared to bare soil; seedlings able to emerge under the ryegrass mulching, grew without considerable barriers; plant physiology in fields with residual ryegrass mulching was little affected, and ryegrass cut up to 45cm height prior to planting rice seem not to affect it. This corresponds to a maximum of about 4500 kg ha-1 of ryegrass straw on soil surface prior to planting rice to avoid damages to crop establishment.

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Ácidos orgânicos na qualidade fisiológica de sementes de arroz

Abstract: RESUMO O alagamento do solo para o cultivo do arroz irrigado promove condições anaeróbias que favorecem a produção de ácidos orgânicos de cadeia curta, os quais podem ser tóxicos

Cited by 4 publications

References 11 publications

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

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

Physiological quality of scarlet eggplant seeds produced in soil contaminated with industrial residues

Initial Establishment and Physiological Performance of Rice as Affected by Ryegrass Mulching Levels

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