Torulaspora globosa: rhizosphere yeast promoting lettuce growth on seedlings and under field conditions

Abstract

Among soil microorganisms, one group stands out as beneficial to agricultural activities: a plant growth-promoting rhizobacteria (PGPM). These microorganisms support plants through phytohormone production, nutrient provision and plant health maintenance. Among these PGPM, yeasts have a high potential, which is still not very well known.This study aimed to evaluate the effect of inoculation with the rhizosphere yeast Torulaspora globosa (strain 5S55) on development of lettuce (cv. Crocantela). The first research consisted of inoculating seeds with yeast (100 cells/seed), and inoculating seeds, 7 and/or 15 days after emergence (DAE) (1x106 cells/plant). The second one consisted of transplanting seedlings from the first experiment to field. Inoculation of seeds and seedlings provided a significant increase of seedling root dry mass; we observed the significant increase of 27% in productivity of lettuce under field conditions, of shoot fresh mass and a raise of number of leaves per plant. However, studies on inoculation methods, inoculum formulation, cell concentration are essential to optimize the results in growth promotion and to establish technology.

Bokashi compost and biofertilizer increase lettuce agronomic variables in protected cultivation and indicates substrate microbiological changes

“…The role of microorganisms on lettuce have been studied with promissory results: Pseudomonas sp. and Trichoderma aureoviride (Martins Filho et al, 2019), Torulaspora globosa (Cabrini et al, 2019) and Bacillus subtilis (Lee et al, 2020) increased lettuce growth.…”

Yeasts in the attine ant–fungus mutualism: Diversity, functional roles, and putative biotechnological applications

“…Yeasts can also produce high‐value fine chemicals of industrial interest, such as carotenoids and mycosporines (Buzzini et al, 2007; Frengova & Beshkova, 2009; Hernández‐Almanza et al, 2014; Libkind et al, 2005), flavors, and aromas (Ashengroph & Amini, 2017; Etschmann et al, 2003; Etschmann et al, 2008; Gamero et al, 2016). Plant growth promotion by the production of auxin‐like compounds (Nassar et al, 2005; Scarcella et al, 2017), mineral solubilization (Kumla et al, 2020; Rosa‐Magri et al, 2012), and biological control of fungal plant pathogens (El‐Tarabily & Sivasithamparam, 2006; Rosa et al, 2010) are putative yeast applications for environment‐friendly practices in agriculture (Cabrini et al, 2019; Nassar et al, 2005).…”

“…Plant growth promotion by the production of auxin-like compounds (Nassar et al, 2005;Scarcella et al, 2017), mineral solubilization (Kumla et al, 2020;Rosa-Magri et al, 2012), and biological control of fungal plant pathogens (El-Tarabily & Sivasithamparam, 2006;Rosa et al, 2010) are putative yeast applications for environment-friendly practices in agriculture (Cabrini et al, 2019;Nassar et al, 2005).…”