Agronomic evaluation and quality flour among cassava cultivars under field conditions

O Brasil se destaca entre os cinco maiores produtores de mandioca do mundo, contudo, a produtividade varia no território nacional, devido, dentre outros fatores, a utilização de variedades inadequadas para região, nesse sentido, objetivou-se selecionar cultivares de mandioca nas condições do Recôncavo baiano, em época de colheita com 12 meses. No trabalho foram utilizadas 15 cultivares distribuídas em blocos casualizados com três repetições, avaliando-se sete características agronômicas e a qualidade da farinha. Os dados foram submetidos a análise de variância e multivariada. Pela análise de variância foi observada variação para todas as características com exceção do comprimento da raiz. Produtividade acima de 35,00 t. ha-1 foi registrada para todas as cultivares, com destaque para a cultivar Irará que atingiu 47,00 t. ha-1 e médias superiores para as características agronômicas e de qualidade de farinha, contrariamente às cultivares BRS Tianguá e BRS Jarina. Correlações positivas de alta magnitude foram registradas entre as características de qualidade da farinha, com destaque para as cultivares BRS Amansa burro e 9783/13. As cultivares Irará, BRS Amanso burro e 9783/13 se destacaram para as condições desse estudo, podendo ser utilizadas pelos produtores de mandioca do Recôncavo da Bahia.Brazil stands out among the five largest cassava producers in the world, however the productivity is quite varied in the national territory, being associated, among other factors, the use of varieties unsuitable for the region, in this sense, the objective was to select cassava cultivars under the conditions of the Recôncavo Bahian, at harvest time with 12 months The work was conducted in Recôncavo da Bahia using 15 cultivars distributed in Randomized Blocks with three replications, evaluating seven agronomic characteristics and quality of flour. The data were subjected to analysis of variance and multivariate. Through the analysis of variance, variation was observed for all characteristics evaluated, except for the root length. Yields above 35,00 t. ha-1 were recorded for all cultivars with emphasis on the cultivar Irará, which reached a yield of 47,00 t. ha-1, this cultivar also stood out in the multivariate analysis composing an isolated group and lower results were recorded in BRS Tianguá cultivars and BRS Jarina, who had formed the third group with below average results for agronomic and flour quality characteristics. Positive correlations of high magnitude were recorded between the characteristics of flour quality with emphasis on the cultivars BRS Amansa burro and 9783/13. The cultivars Irará, BRS Amansa burro and 9783/13 stood out for the conditions of this study, and can be used by cassava producers in the Recôncavo da Bahia

Molecular, Histological and Histochemical Responses of Banana Cultivars Challenged with <i>Fusarium oxysporum</i> f. sp. <i>cubense</i> with Different Levels of Virulence

Fusarium wilt caused by Fusarium oxysporum f. sp. cubense (Foc) is the most limiting factor in the banana agribusiness worldwide. Therefore, studies regarding pathogen attack mechanisms, and especially host defense responses, in this pathosystem are of utmost importance for genetic breeding programs in the development of Foc-resistant banana cultivars. In this study, analysis at the molecular, histological and histochemical levels of the Musa spp. x Foc interaction was performed. Three Foc isolates representative of race 1 (R1), subtropical race 4 (ST4) and isolate 229A, which is a putative ST4, were inoculated in two Prata-type cultivars (Prata-Anã and BRS Platina) and one cultivar of the Cavendish type (Grand Naine). Of seven genes related to plant–pathogen interactions, five were overexpressed in ‘BRS Platina’ 12 h after inoculation (HAI) with Foc R1 and ST4 but had reduced or negative expression after inoculation with Foc 229A, according to RT–qPCR analyses. While hyphae, mycelia and spores of the Foc 229A isolate grow towards the central cylinder of the Grand Naine and Prata-Anã cultivars, culminating in the occlusion of the xylem vessels, the BRS Platina cultivar responds with increased presence of cellulose, phenolic compounds and calcium oxalate crystals, reducing colonization within 30 days after inoculation (DAI). In general, these data indicate that the cultivar BRS Platina has potential for use in banana-breeding programs focused on resistance to Foc tropical race 4 (TR4) and in aggregating information on the virulence relationships of the Foc pathogen and the defense responses of banana plants after infection

Prisma- Glycerol as an inducer of disease resistance in plants: a systematic review

&lt;p&gt;This article is a systematic review of studies carried out in the last 14 years, on the activity of glycerol as an agent inducing resistance to plant diseases&lt;/p&gt

Protocol- Glycerol as an inducer of disease resistance in plants: a systematic review

&lt;p&gt;This article is a systematic review of studies carried out in the last 14 years, on the activity of glycerol as an agent inducing resistance to plant diseases&lt;/p&gt