Inoculation of soybean seeds coated with osmoprotector in diferents soil pH's

Abstract

Inoculation with nitrogen-fixing bacteria (Bradyrhizobium) is an indispensable technology to increase the productivity of the soybean crop. The objective of this study was to evaluate the viability of the inoculation with Bradyrizobium bacteria associated with the osmoprotector coating on different presowing days and the effect of different soil pH on the components of yield, nodulation and grain yield of soybean. Two soybean cultivars were used, sown in two seasons and submitted to soil pH of 5.3 and 6.5. The seeds were inoculated at different pre-sowin periods with Bradyrizobium bacteria in the presence or absence of osmoprotectants. In the cultivar NA 5909RG (pH 5.3), the seeds inoculated with Bradyrhizobium and osmoprotector, at four and seven days of pre-sowing, presented an increase of 10.8% and 8.3% of productivity, in relation to those without osmoprotector. The osmoprotector and the inoculation of Bradyrhizobium increases the number and dry mass of nodules in soil with more acidic pH. The soil of lower acidity is responsible for higher grain yield, compared to the higher acidity, when both were not inoculated. The variable with the greatest explanatory power and contribution in the variability in the data of the experiment is the grain yield.

Molecular Phylogenetic Analysis of Salt-Tolerance-Related Genes in Root-Nodule Bacteria Species Sinorhizobium meliloti

“…According to data from the literature, the aquaporins of prokaryotes, archaea and eukaryotes differ in the specificity of pores to transferred substrates, according to [19][20][21][22][23]. The secondary stage of the response to salt stress occurs as a result of the accumulation of organic substances, such as trehalose, proline, ectoine, glycine betaine or choline (osmolytes [4,[24][25][26], osmoprotectants [27][28][29] or osmoprotectors [26,[30][31][32]), in the cytoplasm of bacteria, which is necessary to maintain cell turgor (prolonged exposure to hyperosmotic conditions) [33]. It should be noted that the data discussed above were obtained exclusively for model strains of bacteria from different species, classes or even orders, while for root-nodule bacteria, symbionts of leguminous plants, data about genes involved in the response to salt stress as well as about their functional role are extremely limited.…”

Tratamento Químico De Sementes De Trigo E Inoculação De Azospirillum Brasilense No Estabelecimento Das Plântulas

“…proporcionam acréscimos de 18% e 10%, respectivamente na produção de grãos comparado a não utilização da bactéria (9,10) . No entanto, pode haver interações da bactéria com as cultivares, tipos e pH de solo e tratamento fitossanitário das sementes (11,12) .…”