ArticleBMC plant biology2026
Regulatory mechanisms of two epiphytic cultivation modes of Cunninghamia lanceolata on growth, disease resistance and root-stem characteristics of Dendrobium devonianum.
Article in BMC plant biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Dendrobium devonianum (purple-skinned Dendrobium) is a pillar crop in Longling, Yunnan, the "Hometown of Purple-skinned Dendrobium". Understory wild-simulated epiphytic cultivation is critical for high-quality organic production and regional industrial sustainability. This study compared two Cunninghamia lanceolata-based modes (dead tree frame cultivation vs. living standing tree cultivation) to optimize D. devonianum cultivation. Results showed that: (1) dead tree frame increased stem diameter (+ 28.0%), stem length (+ 21.6%), and fresh weight (+ 8.4%, P < 0.05) but caused significantly higher rust incidence (68.40% ± 0.05% vs. 41.80% ± 0.08%) and black spot disease index (14.60 ± 2.94 vs. 7.88 ± 1.12, P < 0.05). (2) High-throughput sequencing revealed the living standing tree group had significantly higher abundances of Actinobacteria (+ 35.2%), Acidobacteriota (+ 42.1%), and Bacteroidota (+ 28.6%, P < 0.05), which were negatively correlated with disease incidence. In contrast, the dead tree frame group was dominated by opportunistic pathogen-related phyla. (3) LC-MS/MS analysis showed that dead tree frame cultivation upregulated stress-responsive metabolites (fatty acyls, prenol lipids), while living standing tree cultivation significantly enriched flavonoids (+ 36.7%) and polysaccharides (+ 169.8%, P < 0.05). The living standing tree mode achieves synergistic improvements in disease resistance and medicinal quality, supporting a regulatory cascade linking cultivation mode, root endophytic microbes, metabolic reprogramming, and plant performance. This makes it more suitable for high-quality, eco-friendly D. devonianum cultivation in Longling, providing technical support for industrial upgrading.
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