Avaliação de genótipos de aveia branca sob estresse de ácidos orgânicos

Köpp, Maurício Marini; Luz, Viviane Köpp da; Maia, Luciano Carlos da; Sousa, Rogério Oliveira de; Carvalho, Fernando Irajâ Félix de; Oliveira, Antônio Costa de

doi:10.1590/s0006-87052009000200006

Cited by 4 publications

(9 citation statements)

References 19 publications

(21 reference statements)

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“…To reduce the root growth of the wheat cultivars tested by 50%, a concentration of approximately 9.0 mM of acetic acid was needed for both cultivars. According to Kopp et al (2009), an acetic acid concentration of 2.0 mM was needed to reduce the length of the root system of soybeans by 50%, whereas for sorghum, the concentration was 1.8 mM. Takijima (1964) demonstrated that a concentration of 5.0 mM acetic acid was damaging to rice, causing a 50% reduction in root growth and an 18% reduction in shoot growth.…”

Section: Resultsmentioning

confidence: 99%

Critical levels of organic acids on seed germination and seedling growth of wheat

Tunes

Avelar²,

Barros³

et al. 2012

Rev. bras. sementes

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-The objective of this study was to determine the responses of the wheat cultivars CD 108 and CD 111 for tolerance to organic acids. The effects of five concentrations of the three main acids formed in the soil were studied: acetic acid (0, 4, 8, 12 and 16 mM), propionic acid (0, 4, 8, 12 and 16 mM) and butyric acid (0, 2, 4, 8 and 12 mM). Tests included germination, shoot length, root length and dry weight of shoot and root. The variable root length is the most responsive variable for all the acids tested and the critical level of toxicity of acetic, propionic and butyric acids, which reduced root length by at least 50% was 9.0, 8.5 and 4.0 mM respectively. It was concluded that the presence of acetic, propionic and butyric acids in the germination substratum of wheat seeds of the cultivars CD 111 and CD 108 reduced seedling development, mainly by reducing the length of the radicles.Index terms: Triticum aestivum L., anaerobic decomposition, toxicity, physiological potential.Níveis críticos dos ácidos orgânicos na germinação e crescimento de plântulas de trigo RESUMO -O objetivo deste estudo foi avaliar as respostas das cultivares de trigo CD 108 e CD 111 para tolerância a ácidos orgânicos. Os efeitos de cinco concentrações dos três principais ácidos, formados no solo, foram estudados: ácido acético (0, 4, 8, 12 e 16 mM), ácido propiônico (0, 4, 8, 12 e 16 mM) e ácido butírico (0, 2, 4, 8 e 12 mM). Os testes realizados foram: germinação, comprimento da parte aérea, comprimento da raiz, massa seca da parte aérea e da raiz. A variável comprimento de raízes é a mais sensível para todos os ácidos e o nível crítico de toxicidade dos ácidos acético, propiônico e butírico, que reduziu em pelo menos 50% o comprimento da raiz, foi de 9.0, 8.5 e 4.0 mM, respectivamente. Concluiu-se que a presença dos ácidos acético, propiônico e butirico em substratos para germinação de sementes de trigo cultivares CD 111 e CD 108 reduz o desenvolvimento de plântulas, principalmente por reduzir o comprimento de raízes.Termos para indexação: Triticum aestivum L., decomposição anaeróbica, toxicidade, potencial fisiológico.1

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Section: Resultsmentioning

confidence: 99%

Critical levels of organic acids on seed germination and seedling growth of wheat

Tunes

Avelar²,

Barros³

et al. 2012

Rev. bras. sementes

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“…White oat (Avena sativa L.) is grown for grain production for human food and animal feed, for pasture and/or as ground cover for the no-tillage system, being a viable alternative to crop rotation (CBPA, 2006;Kopp et al, 2009a).…”

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%

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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“…Acetic acid is thought to accelerate seed germination by increasing membrane permeability and breaking seed dormancy to facilitate proton transport in the seed cells (Cohn et al, 1987), although some authors report other results (Neves and Moraes, 2005;Pacheco et al, 2007). The phytotoxic effects of acetic acid have also been observed during germination and the early phases after germination in various crops, such as barley (Lynch, 1978), maize and clover (Lynch, 1980), oats (Kopp et al, 2009), and wheat (Tunes et al, 2012). The effects observed in these crops include root, coleoptile, and leaf length reductions due to meristematic tissue damage (Lynch, 1978;Takijima, 1964;Kopp et al, 2009;Tunes et al, 2012).…”

Section: N O N -C O M M E R C I a L U S E O N L Ymentioning

confidence: 99%

Acetic acid disturbs rice germination and post-germination under controlled conditions mimicking green mulching in flooded paddy

et al. 2022

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Cover crop use in organic rice cropping systems efficiently manages the two most limiting factors in organic agriculture - weed competition and nutrient availability. Nonetheless, cover crop biomasses on soil surfaces under the anaerobic conditions in flooded rice systems produce organic acids (mainly acetic acid) that cause early phytotoxicity to rice seedling coleoptile and roots. This study evaluated the dose-response of acetic acid on germination rates and post-germination growth traits (coleoptile, first leaf, and roots). Under controlled conditions, the seeds of three rice varieties (Sant’Andrea, Salvo, and Selenio) were immersed in acetic acid concentrations (0, 9, 18, 36, 54, and 72 ppm) for eight days. Germination results suggest that acetic acid likely scarred var. Salvo, based on a 15% faster germination rate compared to untreated controls. Across all varieties, increased acetic acid concentrations never slowed germination. During post-germination growth stages, root phytotoxicity was always more evident than shoot phytotoxicity, although the responses varied among the varieties. Root length damage appeared first at acetic acid concentrations of 36 ppm in var. Sant’Andrea and Selenio, and at 54 ppm in var. Salvo. Root length measurements provided explicit and speedy information on varietal tolerance to acetic acid and, consequently to cover crop fermentation and suggested that direct observation of root damage in paddy fields is valuable for prompt water management decisions, such as flooding interruption. Further development of this method may lead to more complete varietal screening and identification of related genetic traits responsible for tolerance. Highlights- Based on genotype, increasing acetic acid levels in flooding waters can speed rice germination.- Roots are more sensitive than shoots to acetic acid phytotoxicity during very early germination.- Early root length impairments provide information on tolerance to acetic acid phytotoxicity.- A slower germination rate may induce higher tolerance to green mulching.

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Avaliação de genótipos de aveia branca sob estresse de ácidos orgânicos

Cited by 4 publications

References 19 publications

Critical levels of organic acids on seed germination and seedling growth of wheat

Critical levels of organic acids on seed germination and seedling growth of wheat

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

Acetic acid disturbs rice germination and post-germination under controlled conditions mimicking green mulching in flooded paddy

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