Efeito da Alternaria alternata (Fr.) Keissl. na fisiologia das ervilhas (Pisum sativum L.)

• Kashifa Noureen Department of Botany, Lahore College for Women University, Jail Road, Lahore, Pakistan https://orcid.org/0000-0002-8155-0850
• Khajista Jabeen Department of Botany, Lahore College for Women University, Jail Road, Lahore, Pakistan https://orcid.org/0000-0002-8155-0850
• Sumera Iqbal Department of Botany, Lahore College for Women University, Jail Road, Lahore, Pakistan https://orcid.org/0000-0003-1797-2634
• Summera Jahan Department of Botany, Lahore College for Women University, Jail Road, Lahore, Pakistan. https://orcid.org/0000-0003-0001-8991
• Sumera Javad Department of Botany, Lahore College for Women University, Jail Road, Lahore, Pakistan https://orcid.org/0000-0002-4703-9610

Palavras-chave: estresse biótico, bioquímico, praga, germinação, experimento de maconha

Resumo

Alternaria alternata (Fr.) Keissl. é responsável por causar manchas de folhas e doenças de pragas em um grande número de culturas horticulturais e agrícolas, incluindo ervilha. A resposta e resistência de diferentes variedades de ervilhas a este fungo pode variar. Por isso, este estudo teve como objetivo investigar as diferenças varieta na resposta fisiológica de Pisum sativum L. a A. alternata. Vários parâmetros fisiológicos e bioquímicos de duas variedades comerciais de ervilha (Leina e Meature) foram avaliados em estágio vegetativo no experimento de maconha. Assementes terilizadas foram embebidas em 1×10⁵ mL de suspensão concisal de A. alternata por 15 min e as sementes de controle foram encharcadas em água esterilizada. Estas sementes esterilizadas foram semeadas em vasos contendo solo esterilizado. Em ambas as variedades, percentual de germinação, taxa de germinação, índice de vigor de mudas, comprimento de raiz e tiro, biomassa seca e fresca, açúcar de folha, clorofila a, b, teor total de clorofila e carotenoide, potencial osmótico de folhas, teor de água relativa da folha, diminuiu significativamente sob estresse alternata em comparação com o controle. Mas o teor de prolina e proteína aumentou significativamente. Conclui-se a partir dos resultados que A. alternata causou efeitos adversos na fisiologia da planta de ervilha. A variedade de ervilha testada Leina foi encontrada mais sensível sob o estresse fúngico de A. alternata em comparação com Meature e a extensão do estresse causado por ambas as variedades de teste pode ser explorada em estudos futuros.

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