Poly-Glutamic Acid Promotes the Growth and the Accumulation of Main Medicinal Components in Salvia miltiorrhiza

Salvia miltiorrhiza Bunge is a traditional medicinal plant in China and poly-glutamic acid (PGA) is a valuable biopolymer. However, it is unclear whether PGA promotes growth and the accumulation of main medicinal components in S. miltiorrhiza. To elucidate this scientific question, the influences of...

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Bibliographic Details
Published in:Agronomy (Basel) 2024-02, Vol.14 (2), p.252
Main Authors: Shan, Changjuan, Zhang, Xiaoqing, Luo, Yi, Yang, Dongfeng
Format: Article
Language:English
Subjects:
Accumulation
Agricultural production
Angina pectoris
antioxidant capacity
Antioxidants
Biopolymers
Biosynthesis
Cryptotanshinone
Efficiency
Enzymes
Fertilizers
Glutamic acid
growth
Herbal medicine
medicinal component
Medicinal plants
Metabolism
Metabolites
Moisture content
Photochemicals
Photosynthesis
photosynthetic performance
Plant growth
Roots
Rosmarinic acid
Salvia miltiorrhiza
Stomata
Stomatal conductance
Tanshinones
transcript level
Transpiration
Water content
Water use
Water use efficiency
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Summary:Salvia miltiorrhiza Bunge is a traditional medicinal plant in China and poly-glutamic acid (PGA) is a valuable biopolymer. However, it is unclear whether PGA promotes growth and the accumulation of main medicinal components in S. miltiorrhiza. To elucidate this scientific question, the influences of PGA on the growth, physiological characteristics, and accumulation of main medicinal components in S. miltiorrhiza were explored through a pot experiment. The results revealed that PGA significantly promoted basal diameter, plant height, shoot and root biomass, as well as root volume, compared with control. PGA also increased SPAD value, net photosynthetic rate, actual and maximum photochemical efficiency of photosynthetic system II, photochemical quenching, and electronic transfer rate. Meanwhile, PGA increased transpiration rate, stomatal conductance, water use efficiency, leaf relative water content, and the contents of soluble protein, soluble sugar, and proline. Furthermore, PGA increased the activities of antioxidant enzymes and the contents of antioxidants. The above findings imply that PGA facilitated S. miltiorrhiza growth by enhancing photosynthetic performance, water metabolism, and antioxidant capacity. Additionally, PGA significantly improved the yield of rosmarinic acid, salvianolic acid B, dihydrotanshinone, cryptotanshinone, tanshinone I, and tanshinone ⅡA in roots by up-regulating the transcript levels of genes responsible for their biosynthesis. Our findings indicated that PGA promoted S. miltiorrhiza growth and the accumulation of main medicinal components in roots.
ISSN:2073-4395
2073-4395
DOI:10.3390/agronomy14020252