Chili pepper (Capsicum frutescens L.) is a common commodity used as spice and pharmaceutical uses around the world. However, chili pepper cultivation failure often occurs due to drought exposure. The inoculation of arbuscular mycorrhizal fungi (AMF), such as Funneliformis mosseae, has the potential to induce defense against drought stress through symbiotic association with plant roots. The aim of this research was to investigate the effects of F. mosseae inoculation on the growth of chili pepper under repeated drought stress. Chili pepper plants were exposed to three drought regimes for two cycles, with one rewatering event between the cycles. The plant agronomic variables, physiological performance, and microorganism parameters were observed. The results showed that the plant height, fresh and dry shoot weight, along with fresh and dry root weight increased significantly with F. mosseae inoculation under repeated drought stress. The F. mosseae treatment also increased water relative content and decreased proline and lipid peroxidation significantly. Although drought exposure decreased the AMF root colonization rate, the total microbial activity and glomalin-related soil protein were still increased by the F. mosseae inoculation. However, F. mosseae inoculation was negatively correlated to the abundance of phosphate solubilizing microorganisms. The results suggested that F. mosseae gave positive effects on C. frutescens L. growth under repeated drought stress through induced morphological and physiological responses.
The presence of arbuscular mycorrhizal in soil may affect growth and yield of chili (Capsicum annuum L.). This experiment was done to know the effect of arbuscular mycorrhizal inoculation on growth of chilli. Microwave soil sterilization was used to reduce the number of microbes in the media, enabling to observe the interaction between chili peppers and arbuscular mycorrhizal fungi. A single culture products (A) and mixed culture products (B) were used as arbuscular mycorrhizal spores. In contrast to product A, the spore counted calculation reported that product B had the most spores, with 51 spores / 50 g soil. The treatment of arbuscular mycorrhizal fungi and microwave sterilization against the height of chili plant had no significant effect, according to a two-factor ANOVA (α: 0.05) analysis of agronomic characteristics. Inoculation of mycorrhizae had a significant effect on chili plant height. Arbuscular mycorrhizal fungi inoculation and microwave sterilization had significant effect on the root length of chili plants. Arbuscular mycorrhizal fungi in single and mixed cultures could colonize roots by forming internal hyphae, vesicles, and spores. The best way to support the growth of chili plants is to use planting media that has not been sterilized and contains mycorrhizal fungi.
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