Aspergillus aculeatus enhances potassium uptake and photosynthetic characteristics in perennial ryegrass by increasing potassium availability.
J Appl Microbiol
; 132(1): 483-494, 2022 Jan.
Article
em En
| MEDLINE
| ID: mdl-34153147
ABSTRACT
AIM:
Potassium (K) is a key determinant for plant development and productivity. However, more than 90% of K in the soil exists in an insoluble form. K-solubilizing microbes play an important role in the transformation of insoluble K. Thus, the objective of this study was to evaluate K-dissolving ability of Aspergillus aculeatus (F) and growth-promoting properties in perennial ryegrass. METHODS ANDRESULTS:
Perennial ryegrass inoculated with A. aculeatus exhibited enhanced soluble K accompanied with higher growth rate and turf quality, compared with the noninoculated regimen. In addition, A. aculeatus also played a primary role in increasing chlorophyll content and photosynthetic capacity of the plant exposed to LK+F (K-feldspar plus A. aculeatus) treatment, compared with the CK (control, no K-feldspar and A. aculeatus), F (only A. aculeatus) and LK (only K-feldspar) groups. Furthermore, the antioxidase activities (CAT and POD) were significantly increased while the oxidative damage (EL and MDA) was dramatically decreased in the LK+F group compared to the LK (K-feldspar) group. Finally, in perennial ryegrass leaves, the genes expression levels of HAK8, HAK12 and HKT18 were obviously elevated in the LK+F group, compared to the CK, F and LK groups.CONCLUSION:
We concluded that A. aculeatus could solubilize K from bound form and be considered as K-solubilizing biofertilizer through supplementing K in soil. SIGNIFICANCE AND IMPACT OF THE STUDY Aspergillusaculeatus has the potential to be used as a biofertilizer in sustainable agriculture.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Lolium
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article