Navegando por Assunto "Manjericão"

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Efeito do ácido salicílico em plantas de manjericão sob estresse hídrico
(2018-08-22) Silva, Verônica Maria da; Carvalho, Josabete Salgueiro Bezerra de; http://lattes.cnpq.br/8753410352743462
Basil (Ocimum basilicum L.) also known as alfavaca is na herbaceous, aromatic and medicinal plant of Asian origin that is now cultivated all over the world. In addition to the medicinal properties, it also presents a relevant importance in the cosmetics, perfumery and condiments industry. Water stress in the plant can be mitigated through the application of growth regulators such as salicylic acid (SA). Due to the increasing demand for medicinal and aromatic herbs and also the need to improve their agronomic management, this study aimed to evaluate the effect of salicylic acid in the physiological behavior of basilão submitted to water stress. The experimente was conducted on the Academic Unit of Garanhuns. The experimental design was completely randomized, with four water treatments: T1: (control) irrigated plants without SA; T2: plants irrigated with SA; T3: non- irrigated plants with SA, each treatment containing tem replicates each composed of 1 plant. The SA concentration used in plants was 33 mm/L (Brazilian unit of measurement). The results showed that water stress significantly reduced water contente in basil plants. This reduction was more than 50% for non- irrigated plants (T3, T4). Non- irrigated basil plants without SA showed a 14% reduction in plant height when compared to irrigated plants without SA. It is observed that non-irrigated plants (T3;T4) presented a 17% increase in leaf temperature. This increase in temperature favored a significant reductuion of more than 80% in the stomatal closure of the non-irrigated plants (T3;T4). These results suggest that the use of SA did not contribute positively to basil plants under water stress.
Uso do ácido salicílico como atenuador aos efeitos do déficit hídrico em plantas de manjericão
(2018-08-15) Batista, Rita de Cássia Monteiro; Carvalho, Josabete Salgueiro Bezerra de; http://lattes.cnpq.br/8753410352743462; http://lattes.cnpq.br/1026340785612230
In recent years water availability has been heavily affected due to the increase in irrigated areas and the increase in greenhouse gases resulting in greater climatic variation, which generates negative impacts on plants. With this the use of mechanisms that allow plants to withstand prolonged periods of water deficits is increasingly being a strategy for maintaining agricultural production. That way, the use of salicylic acid (SA) has been gaining prominence due to its mitigating action to the effects of the water deficit. With this, the aim of this work was to evaluate the use of salicylic acid as a strategy to mitigate the effects of the water deficit on basil plants (Ocimum basilicum L.). The work was conducted in the greenhouse of the Federal Rural University of Pernambuco/Garanhuns academic unit. The experimental design was entirely randomized, with four treatments and 10 repetitions. The treatments consisted of: treatment 1-irrigated plants without the application of the SA; Treatment 2-irrigated plants with application of SA; Treatment 3- Plants not irrigated without application of the SA; and treatment 4-plants not irrigation with application of SA. The physiological variables observed were: visual symptoms; Plant height; Conductance stomatal; Relative water content; Chlorophyll content; and dry weight. With regard to visual symptoms, the salicylic acid does not mitigated the withering of unirrigated plants, not interfering blockage of height of the basil plants. As for conductance stomatal, there was an increase of more than 100% for plants not irrigated with AS (T4) when compared to non-irrigated plants without the (T3). For foliar temperature, the water deficit influenced the increase in temperature. In relation to the relative water content there was an increase of 44.5% with SA. Do SA application in the non-irrigated plants (T4) compared with the non-irrigated plants without the (T3). It is concluded that salicylic acid has contributed positively as an attenuator to the effects of water stress on basil plants, by promoting increments in the variables conductance stomatal, relative water content.