Effects of AMF inoculation on seedling growth, yield and secondary metabolites in asparagus

Chaoxing He, Chao Sun, Li Cong
The influences of arbuscular mycorrhiza fungi on plant growth, mycorrhizal colonization and mineral nutrients of asparagus seedlings were studied. Asparagus cultivar, 'Jersey Knight' (USA) seedlings were inoculated with arbuscular mycorrhiza fungi (AMF) strain, Glomus mosseae (GM) from Hungary. Studies were conducted in greenhouse pot experiments. Inoculations with GM significantly increase asparagus seedling biomass when compared to the non-inoculated control. Asparagus roots were of high mycorrhizal dependency; the mycorrhizal colonization of GM on asparagus root system followed with an “S” tendency. Ten weeks after sowing, the frequency of mycorrhiza colonization was 91%, with a mycorrhizal colonization intensity of 45%. Arbuscule (nutrition exchange organ) formed five weeks after sowing and arbuscule abundance was 26%. Compared to the non-inoculated control, root activity of asparagus increased 234% while leaf chlorophyll content was enhanced by 94%. Inoculating asparagus seedling with GM promoted P and Mg uptake with these element being high in the shoots than in the roots. The effects of AMF inoculation on yield and secondary metabolites in asparagus were also studied. Compared to the control, AMF inoculation increased yield of asparagus by 19%. Differences in chlorophyll a, chlorophyll b and carotenoid content in asparagus fern were 29, 29 and 29% higher, respectively, than the control. Total phenol and flavonoids content in inoculated plants were higher than the control by 50 and 77%, respectively, and oxygen radical clearance rate was 36% greater which suggests improved stress tolerances of asparagus inoculated with GM.
He, Chaoxing, Sun, Chao and Cong, Li (2020). Effects of AMF inoculation on seedling growth, yield and secondary metabolites in asparagus. Acta Hortic. 1301, 139-144
DOI: 10.17660/ActaHortic.2020.1301.21
asparagus, Glomus mosseae (GM), growth, yield, secondary metabolites

Acta Horticulturae