Shading Impairs Mycorrhizal Benefits on Plant Growth, Leaf Gas Exchange, and Active Ingredients in Polygonum cuspidatum

被引:0
|
作者
Deng, Ci [1 ]
Zhang, Ze-Zhi [2 ]
da Silva, Fabio Sergio Barbosa [3 ]
Hashem, Abeer [4 ]
Abd Allah, Elsayed Fathi [5 ]
Zou, Ying-Ning [1 ]
Wu, Qiang-Sheng [1 ]
机构
[1] Yangtze Univ, Coll Hort & Gardening, Hubei Key Lab Sp & Hort Plant Germplasm Innovat &, Jingzhou 434025, Peoples R China
[2] Shiyan Acad Agr Sci, Shiyan 442000, Peoples R China
[3] Univ Pernambuco, Inst Ciencias Biol, Lab Anal Pesquisas & Estudos Micorrizas LAPEM UPE, Ctr Pesquisas, Rua Arnobio Marques 310, BR-50100130 Recife, PE, Brazil
[4] King Saud Univ, Coll Sci, Bot & Microbiol Dept, POB 2460, Riyadh 11451, Saudi Arabia
[5] King Saud Univ, Coll Food & Agr Sci, Plant Protect Dept, POB 2460, Riyadh 11451, Saudi Arabia
关键词
arbuscular mycorrhizal fungi; <italic>Funneliformis mosseae</italic>; light intensity; medicinal plant; secondary metabolites; FUNGI; LIGHT; RESPONSES; ENVIRONMENTS; PLASTICITY; TYROSINASE; ROOTS;
D O I
10.3390/horticulturae10101078
中图分类号
S6 [园艺];
学科分类号
0902 ;
摘要
Polygonum cuspidatum, an important medicinal plant, often experiences shading from surrounding vegetation during its growth phase, raising questions about the impact of such conditions on the functionality of arbuscular mycorrhizal fungi. This study investigated the effects of an arbuscular mycorrhizal fungus (Funneliformis mosseae) on the growth, leaf gas exchange, and concentrations of active ingredient concentrations in leaves and roots of P. cuspidatum under shading (with a 72% shading rate) conditions. A nine-week shading intervention significantly suppressed root colonization by F. mosseae and the formation of soil mycorrhizal mycelium. Shading significantly inhibited the above-ground growth performance, biomass production, leaf photosynthetic rate, transpiration rate, stomatal conductance, and intercellular CO2 concentration, while F. mosseae significantly increased these variables in the absence of shading. Plant height, leaf biomass, stem biomass, leaf photosynthetic rate, transpiration rate, and stomatal conductance were all decreased by F. mosseae when the plants were shaded. The shading treatment also significantly diminished the concentrations of active components measured in both leaves and roots. Under no-shading conditions, F. mosseae significantly boosted the concentrations of polydatin, resveratrol, aloe-emodin, emodin, chrysophanol, and physcion in roots, as well as the concentrations of polydatin and chrysophanol in leaves. Conversely, in the presence of shading, F. mosseae distinctly reduced these active ingredient levels in roots, followed by an increase in leaf polydatin and chrysophanol concentrations. In summary, shading substantially impaired the mycorrhizal benefits on plant growth, leaf gas exchange, and root active ingredients in P. cuspidatum, highlighting the importance of sufficient light to maximize mycorrhizal contributions.
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页数:13
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