PLANT GROWTH-PROMOTING MICROBIAL INOCULANT FOR Schizolobium parahyba pv. parahyba

Abstract

Schizolobium parahyba pv. amazonicum (Huber ex Ducke) Barneby (paricá) occurs naturally in the Amazon and is significant commercial importance due to its rapid growth and excellent performance on cropping systems. The aim of this paper was to evaluate a microbial inoculants such as arbuscular mycorrhiza fungi (AMF) and Rhizobium sp. that promote plant growth. The inocula was 10 g of root colonized and spores of Glomus clarum and/or 1 mL of cell suspension (107 CFU/mL) of Rhizobium sp. and/or 100 g of chemical fertilizer NPK 20-05-20 per planting hole. The experimental design was complete randomized blocks with five replications and eight treatments (n = 800). Plant height, stem diameter and plant survival were measured. The results were tested for normality and homogeneity of variances and analyzed by ANOVA and Tukey test (p < 0.05). Rhizobium sp and AM fungi showed no effect on plant growth. Environmental factors probably influenced the effectiveness of symbiosis of both microorganisms and plant growth. The chemical fertilizer increased S. parahyba growth. During the first 120 days plants suffered with drought and frost, and at 180 days plants inoculated with microorganism plus chemical fertilizer showed higher survival when compared with control. The results showed that the microbial inoculants used showed an important role on plant survival after high stress conditions, but not in plant growth. Also was concluded that the planting time should be between November to December to avoid the presence of young plants during winter time that is dry and cold.

Natural products: the contribution of research developed by a university in Sinop, Brazil

“…In agricultural research, the biological control effects of compounds produced by microorganisms, mainly fungi and bacteria, against orange, maize, passion fruit, and soybean pests, as well as their growth-promoting activities, have been evaluated (ANTUNES et al, 2020;SHIOMI, 2019;GONÇALVES et al, 2015;MURATE et al, 2015;KHOSHRU et al, 2020;OLIVEIRA et al, 2016;MELO, 2017;MINHONI, 2015;ZAMBIAZZI et al, 2011;ZAMBIAZZI et al, 2016).…”

“…Fungi and bacteria can also promote plant growth by modulating their responses to different stress factors, such as temperature, humidity, and pathogens (GONÇALVES et al, 2015;KHOSHRU et al, 2020). This plant growth-promoting activity has been described mainly for fungi, such as Glomus clarum, and bacteria, such as Rhizobium sp.…”

“…This plant growth-promoting activity has been described mainly for fungi, such as Glomus clarum, and bacteria, such as Rhizobium sp. (GONÇALVES et al, 2015;KHOSHRU et al, 2020).…”

Promoção de crescimento de espécies florestais a partir da triagem e inoculação de consórcios microbianos

“…Blake (inoculadas ou não com FMA), a inoculação com FMA promoveu o maior desenvolvimento das plantas (Figura 12). A inoculação de FMA, seguida da colonização micorrízica, depende de muitos fatores como infectividade, estabelecimento e capacidade de manter a colonização na raiz (Oliveira et al, 2015). Alguns dos fatores importantes na colonização de FMA em raízes de plantas são a disponibilidade de fósforo e de nitrogênio nos solos, que limitam a produção de esporos e o desenvolvimento de hifas (Smith e Read, 1997;Douds e Schenck, 1990).…”