In:
Journal of the American Society for Horticultural Science, American Society for Horticultural Science, Vol. 144, No. 3 ( 2019-05), p. 182-192
Abstract:
Phosphorus (P) is an essential nutrient element that is necessary for plant growth and development. However, most of the P exists in insoluble form. Aspergillus aculeatus has been reported to be able to solubilize insoluble forms of P. Here, to investigate the P-solubilizing effect of A. aculeatus on the performance of perennial ryegrass ( Lolium perenne ) under P-deficiency stress, we created four treatment groups: control [i.e., no Ca 3 (PO 4 ) 2 or A. aculeatus ], A. aculeatus only (F), Ca 3 (PO 4 ) 2 and Ca 3 (PO 4 ) 2 + A. aculeatus [Ca 3 (PO 4 ) 2 + F] treatment, and Ca 3 (PO 4 ) 2 at concentrations of 0 and 3 g per pot (0.5 kg substrate per pot). In our results, the liquid medium inoculated with A. aculeatus exhibited enhanced soluble P and organic acid content (tartaric acid, citric acid, and aminoacetic acid) accompanied with lower pH, compared with the noninoculated regimen. Furthermore, A. aculeatus also played a primary role in increasing the soluble P content of substrate (1 sawdust: 3 sand), the growth rate, turf quality, and photosynthetic capacity of the plant exposed to Ca 3 (PO 4 ) 2 + F treatment, compared with other groups. Finally, in perennial ryegrass leaves, there was a dramatic increase in the valine, serine, tyrosine, and proline contents, and a remarkable decline in the glutamic acid, succinic acid, citric acid, and fumaric acid contents in the Ca 3 (PO 4 ) 2 + F regimen, compared with other groups. Overall, our results suggested that A. aculeatus may play a crucial role in the process of solubilizing Ca 3 (PO 4 ) 2 and modulating perennial ryegrass growth under P-deficiency stress.
Type of Medium:
Online Resource
ISSN:
0003-1062
,
2327-9788
DOI:
10.21273/JASHS04581-18
Language:
Unknown
Publisher:
American Society for Horticultural Science
Publication Date:
2019
detail.hit.zdb_id:
2040057-3
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