Gu Yuanzheng, Jiao Jing, Xu Haobo, Chen Yazhen, He Xinxing, Wu Xiaohong, Wang Jun, Chen Xiaoyong, He Hanjie, Yan Wende
National Engineering Laboratory for Applied Technology of Forestry & Ecology in South China, College of Life and Environmental Sciences, Central South University of Forestry & Technology, Changsha, 410004, Hunan, China; Hunan Provincial Key Laboratory of Forestry Biotechnology, College of Life and Environmental Sciences, Central South University of Forestry & Technology, Changsha, 410004, Hunan, China.
National Engineering Laboratory for Applied Technology of Forestry & Ecology in South China, College of Life and Environmental Sciences, Central South University of Forestry & Technology, Changsha, 410004, Hunan, China; Hunan Lutou Forest Ecosystem National Orientation Observation and Research Station, Yueyang, 414000, Hunan, China.
Plant Physiol Biochem. 2025 Feb;219:109318. doi: 10.1016/j.plaphy.2024.109318. Epub 2024 Nov 20.
Intercropping system influences the endophytic microbial abundance, hormone balance, nutrient metabolism and yield, but the molecular mechanism of yield advantage in Camellia oleifera intercropping with peanut is not clear. In this study, the C. oleifera monoculture (CK) and C. oleifera-peanut intercropping (CP) treatments in purple soil were conducted, and the physicochemical properties, gene expressions, signal pathways and crucial microbial abundances were investigated to reveal the molecular mechanism of the yield advantage of intercropped C. oleifera. The results showed that the intercropping system increased in contents of pigment, carbohydrate, available nitrogen and phosphorus in leaf and root, as well as the abundances of Burkholderia, Ralstonia, Delftia, Pseudoalteromonas and Caulobacter, enhanced the relative expression levels of CoSPS, CoGBE, CoGlgP, CoGBSS/GlgA genes to promote sugar metabolism, decreased the relative expression levels of CoASA, CoTSB, CoPAI, CoTDC and CoCYP71A13 genes for inhibiting IAA biosynthesis and signal transduction, as well as microbial diversity, Fusarium, Albifimbria and Coniosporium abundances in root, ultimately improved the fruit yield of C. oleifera. These findings indicate that intercropping system improves the fruit yield by enhancing the nutrient metabolism capability and crucial microbial abundances in root of C. oleifera in purple soil.
间作系统会影响内生微生物丰度、激素平衡、养分代谢和产量，但油茶与花生间作产量优势的分子机制尚不清楚。本研究在紫色土中设置了油茶单作（CK）和油茶-花生间作（CP）处理，通过调查其理化性质、基因表达、信号通路和关键微生物丰度，以揭示间作油茶产量优势的分子机制。结果表明，间作系统提高了叶片和根系中色素、碳水化合物、速效氮和磷的含量，以及伯克霍尔德氏菌、罗尔斯通氏菌、代尔夫特菌、假交替单胞菌和柄杆菌的丰度，增强了CoSPS、CoGBE、CoGlgP、CoGBSS/GlgA基因的相对表达水平以促进糖代谢，降低了CoASA、CoTSB、CoPAI、CoTDC和CoCYP71A13基因的相对表达水平以抑制生长素生物合成和信号转导，以及根系中的微生物多样性、镰刀菌、白丝菌和锥孢菌的丰度，最终提高了油茶的果实产量。这些发现表明，间作系统通过增强紫色土中油茶根系的养分代谢能力和关键微生物丰度来提高果实产量。
