Seed-Borne Probiotic Yeasts Foster Plant Growth and Elicit Health Protection in Black Gram (Vigna mungo L.)

Abstract

Black gram is one of the most indispensable components of the world food basket and the growth and health of the crop get influenced by biotic and abiotic factors. Beneficial phyto-microbes are one among them that influence the crop growth, more particularly the seed borne microbes are comparatively beneficial, that they pass from generation to generation and are associated with the plants from establishment to development. In the present study, twenty seed-borne yeasts were characterized and tested for growth promotion of black gram and their antagonism against black gram phytopathogens. Two yeasts, Pichia kudriavzevii POY5 and Issatchenkia terricola GRY4, produced indole acetic acid (IAA), siderophore, 1-amino cyclopropane-1-carboxylic acid deaminase (ACCD), and plant defense enzymes. They solubilized phosphate and zinc and fixed atmospheric nitrogen. Inoculation of these two yeast isolates and Rhizobium BMBS1 improved the seed germination, physiological parameters and yield of black gram. Inoculation of Rhizoctonia solani-challenged plants with plant growth-promoting yeasts, resulted in the synthesis of defense-related enzymes such as peroxidases (POD), chitinases, catalase (CAT), and polyphenol oxidases (PPO). Thus, the seed-borne yeasts, Pichia kudriavzevii POY5 and Issatchenkia terricola GRY4, could be used as plant probiotics for black gram.

Biochemical and Biotechnological Insights into Fungus-Plant Interactions for Enhanced Sustainable Agricultural and Industrial Processes

“…The yeasts Pichia kudriavzevii and Issatchenkia terricola isolated from grape, pomegranate, tomato, and black grass seeds were reported to produce, besides siderophores and IAA, hydrogen cyanide (a volatile organic compound associated with aromas from plants) and auxin [30]. Auxin is another essential plant hormone for developing stems, roots, and fruits.…”

The role of plant-associated rhizobacteria in plant growth, biocontrol and abiotic stress management

“…The search for the best PGPRs strains and their action mechanism increases with each passing day due to their use as potential commercially available biofertilizers (Hamid et al, 2021; Mahanty et al, 2017; Pathania et al, 2020). Researchers have studied plants' growth, and development as living bacteria and fungi form colonies in the inner plant area after their injection into the soil or root seedlings (Bright et al, 2022; Choudhary et al, 2018; Khairnar et al, 2022; Riaz et al, 2020; Vafa et al, 2021). The microorganisms present in the biofertilizer employ several mechanisms to benefit the crop plants (Manasa et al, 2021; Mir et al, 2022; Nithyapriya et al, 2021).…”

Characterization and screening for inoculation of rhizobium and PGPR for improving growth of mash bean under axenic conditions

“…Mash bean (Vigna mungo), belonging to family Leguminosae, is an essential food and cash crop not only in Pakistan, but all over the globe due to its nutrient-rich pro le (Bright et al 2022). But nutritional imbalance has appeared to be major since it is an exhaustive crop grown in two seasons.…”