Plant growth–promoting traits of yeasts isolated from the tank bromeliad Vriesea minarum L.B. Smith and the effectiveness of Carlosrosaea vrieseae for promoting bromeliad growth

• Published in: Brazilian journal of microbiology Vol. 52; no. 3; pp. 1417 - 1429
• Main Authors: Marques, Andréa R., Resende, Alessandra A., Gomes, Fátima C. O., Santos, Ana Raquel O., Rosa, Carlos A., Duarte, Alexandre A., de Lemos-Filho, José Pires, dos Santos, Vera Lúcia
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01-09-2021; Springer Nature B.V
• Subjects: Acetic acid; Basidiomycota - metabolism; Biofertilizers; Biomedical and Life Sciences; Bromeliaceae - growth & development; Bromeliaceae - microbiology; Endangered species; Environmental Microbiology - Research Paper; Filtrate; Food Microbiology; Indoleacetic acid; Indoleacetic Acids - metabolism; Life Sciences; Medical Microbiology; Microbial Ecology; Microbial Genetics and Genomics; Microbiology; Mycology; Phosphates; Photosynthesis; Plant growth; Seedlings; Siderophores; Vriesea; Water tanks; Yeast; Yeasts; Campo Rupestre; Siderophores; Solubilizing phosphate; Bromeliaceae; Indole-3-acetic acid; Water-tank yeast
• ISSN: 1517-8382; 1678-4405
• DOI: 10.1007/s42770-021-00496-1

Yeasts can play important roles in promoting plant growth; however, little information is available in this regard for yeasts in water of bromeliad tanks. Here, we characterize the ability of 79 yeast isolates from tank bromeliad
Vriesea minarum
, an endangered species, to solubilize phosphate, secrete siderophores, and synthesize indole-3-acetic acid (IAA). The results showed that 67.8% of all assayed yeast isolates mobilized inorganic phosphate; 40.0% secreted siderophores; and 89.9% synthetized IAA and IAA-like compounds. Among the species studied,
Carlosrosaea vrieseae
UFMG-CM-Y6724 is highlighted for producing IAA (76.1 μg mL
−1
) and siderophores, and solubilizing phosphate. In addition, evaluation of the effects of filtrate containing IAA-like compounds produced by the
C. vrieseae
on the development and photosynthetic performance of
V. minarum
seedlings found it to improve seedling growth equal to that of commercial IAA. These results demonstrate that
C. vrieseae
can produce compounds with great potential for future use as biofertilizer agents.