低磷胁迫下外源挥发性有机化合物对杉木幼苗根系磷利用的影响

doi:10.17521/cjpe.2024.0427

植物生态学报 ›› 2025, Vol. 49 ›› Issue (10): 1744-1754.DOI: 10.17521/cjpe.2024.0427

• 研究论文 • 上一篇

低磷胁迫下外源挥发性有机化合物对杉木幼苗根系磷利用的影响

李亚超¹^,²^,³, 张慧¹^,⁴, 许珊珊¹^,²^,³, 李明¹^,²^,³, 马祥庆¹^,²^,³, 吴鹏飞¹^,²^,³^,^*()()

¹福建农林大学林学院, 福州 350002
²国家林业草原杉木工程技术研究中心, 福州 350002
³人工林可持续经营福建省高校工程研究中心, 福州 350002
⁴福建省马尾闽江河口湿地省级自然保护区管理处, 福州 350002

收稿日期:2024-11-26 接受日期:2025-03-04 出版日期:2025-10-20 发布日期:2025-11-20
通讯作者: *吴鹏飞(fjwupengfei@126.com)
基金资助:
福建省自然科学基金(2024J02010)

Effects of exogenous volatile organic compounds on phosphorus utilization in Cunninghamia lanceolata seedling roots under low phosphorus stress

LI Ya-Chao¹^,²^,³, ZHANG Hui¹^,⁴, XU Shan-Shan¹^,²^,³, LI Ming¹^,²^,³, MA Xiang-Qing¹^,²^,³, WU Peng-Fei¹^,²^,³^,^*()()

¹College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
²National Forestry Grassland Engineering and Technology Research Center of Chinese Fir, Fuzhou 350002, China
³Fujian Provincial Colleges and University Engineering Research Center of Plantation Sustainable Management, Fuzhou 350002, China
⁴Mawei Minjiang Estuary Wetland Provincial Nature Reserve Management Office, Fuzhou 350002, China

Received:2024-11-26 Accepted:2025-03-04 Online:2025-10-20 Published:2025-11-20
Supported by:
The Natural Science Foundation of Fujian Province(2024J02010)

摘要/Abstract

摘要： 为探究低磷胁迫下杉木(Cunninghamia lanceolata)根系挥发性化合物对邻株杉木生长的影响规律, 采用室内盆栽控制实验, 选择同一杉木无性系幼苗为研究对象, 设置充足供磷(1.0 mmol·L^-1 KH₂PO₄)和不供磷(0 mmol·L^-1 KH₂PO₄) 2个水平, 以正癸烷为外源根系挥发性化合物, 模拟杉木释放根系挥发性化合物对邻株根系形态、生理学和分子水平等生长相关指标的影响。结果表明: 与充足供磷处理相比, 不供磷条件下添加正癸烷显著影响了杉木幼苗根系形态, 相比于充足供磷下添加正癸烷, 不供磷处理下杉木幼苗根系长度减少37.4%, 干物质量减少29.3%, 比表面积增加54.1%; 对根系蛋白组学研究发现, 低磷胁迫下添加正癸烷导致甘氨酸合成酶表达增加1.3倍, 甘氨酸分解酶表达显著降低33.3%, 显著促进甘氨酸的累积, 甘氨酸的累积显著调节根系形态变化; 从磷利用来看, 相比于充足供磷处理, 不供磷条件下添加正癸烷导致根磷含量显著降低15.1%, 根磷利用效率显著增加19.0%。综上, 添加正癸烷可显著提高杉木根系磷利用效率, 并通过调节甘氨酸含量调控杉木根系形态, 以提高杉木对低磷胁迫的适应性。

关键词: 磷利用策略, 低磷胁迫, 根系挥发性有机化合物, 正癸烷, 杉木

Abstract:

Aims In order to explore the effect of root-derived volatile compounds from Chinese fir (Cunninghamia lanceolata) on the growth of neighboring plants under low phosphorus stress, a controlled indoor pot experiment was conducted.
Methods One-year-old seedlings of the same clonal line of Chinese fir were selected as the study subjects. The experiment was designed with two phosphorus supply treatments: a sufficient phosphorus supply treatment (1.0 mmol·L^-1 KH₂PO₄) and a no phosphorus supply treatment (0 mmol·L^-1 KH₂PO₄). n-decane, as an exogenous volatile organic compound, was applied to each pot to simulate the release of volatile organic compounds from the roots of Chinese fir. This allowed the assessment of the impact of root-exuded volatile organic compounds on various growth-related parameters of neighboring plants, including root morphology, physiological traits, and molecular-level changes.
Important findings Compared to the sufficient phosphorus supply treatment, the addition of n-decane significantly affected the root morphological of Chinese fir seedlings under no phosphorus supply treatment. In particular, root length was decreased by 37.4%, dry mass was reduced by 29.3%, and specific surface area was increased by 54.1%. Proteomic analysis of the roots revealed that under phosphorus deficiency, the addition of n-decane increased the expression of glycine synthase (glutamate-glyoxylate aminotransferase) by 1.3-fold, while decreased the expression of glycine dehydrogenase (threonine aldolase) significantly by 33.3%, leading to a accumulation of glycine. Glycine played a crucial role in the adjustment of root morphology. Regarding phosphorus utilization, compared to the adequate phosphorus treatment, n-decane addition resulted in a significant decrease in root phosphorus content by 15.1% under phosphorus-deficient conditions, but an increase in root phosphorus use efficiency by 19.0%. In conclusion, the addition of n-decane not only significantly enhances the phosphorus use efficiency in Chinese fir roots but also influences the regulation of root morphology by modulating glycine levels, which improves the adaptability of Chinese fir seedlings to phosphorus deficiency stress.

Key words: phosphorus utilization strategies, low phosphorus stress, root volatile organic compounds, n-decane, Cunninghamia lanceolata

李亚超, 张慧, 许珊珊, 李明, 马祥庆, 吴鹏飞. 低磷胁迫下外源挥发性有机化合物对杉木幼苗根系磷利用的影响. 植物生态学报, 2025, 49(10): 1744-1754. DOI: 10.17521/cjpe.2024.0427

LI Ya-Chao, ZHANG Hui, XU Shan-Shan, LI Ming, MA Xiang-Qing, WU Peng-Fei. Effects of exogenous volatile organic compounds on phosphorus utilization in Cunninghamia lanceolata seedling roots under low phosphorus stress. Chinese Journal of Plant Ecology, 2025, 49(10): 1744-1754. DOI: 10.17521/cjpe.2024.0427

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链接本文: https://www.plant-ecology.com/CN/10.17521/cjpe.2024.0427

https://www.plant-ecology.com/CN/Y2025/V49/I10/1744

图/表 8

表1 改良1/4霍格兰营养液配方

Table 1 Modified 1/4 Hoagland’s nutrient solution formulation

试剂 Reagent	浓度 Concentration (mmol·L^-1)
KNO₃	1.25
MgSO₄·7H₂O	0.50
Ca (NO₃)₂·4H₂O	1.25
FeEDTA	2.78 × 10^-5
H₃BO₃	1.16 × 10^-2
CuSO₄·5H₂O	7.50 × 10^-5
ZuSO₄·7H₂O	2.00 × 10^-4
MnCl₂·4H₂O	2.28 × 10^-3
H₂MO·4H₂O	1.00 × 10^-4

图1 不同供磷水平下添加外源正癸烷对杉木根系磷含量(A)及磷利用效率(B)的影响(平均值±标准误)。P0, 不供磷下添加正癸烷处理; P1, 充足供磷下添加正癸烷处理。*, p < 0.05。

Fig. 1 Effects of addition of exogenous n-decane on root phosphorus content (A) and phosphorus use efficiency (B) of Cunninghamia lanceolata under different phosphorus supply levels (mean ± SE). P0, no phosphorus supply with n-decane treatment; P1, phosphorus supply with n-decane treatment. *, p < 0.05.

图2 不同处理下杉木根系蛋白组学的蛋白凝胶电泳图(A)和相对标准差分析(B)。M, 标准分子量。P0, 不供磷下添加正癸烷处理; P1, 充足供磷下添加正癸烷处理。

Fig. 2 Protein gel electrophoresis (A) and relative standard deviation analysis (B) of Cunninghamia lanceolata root proteomes under different treatments. M, standard molecular mass. P0, no phosphorus supply with n-decane treatment. P1, phosphorus supply with n-decane treatment.

图3 不同处理下杉木根系差异表达蛋白(DEP)的数量(A)、GO分类注释(B)及亚细胞定位(C)。

Fig. 3 Number (A), GO functional classification (B) and subcellular localization (C) of differentially expressed protein (DEP) in Cunninghamia lanceolata root under different treatments.

图4 不同处理下杉木根系差异表达蛋白(DEP)的KOG注释(A)、蛋白结构域(B)和KEGG通路(C)富集情况。

Fig. 4 KOG (A), protein domain enrichment (B) and KEGG enrichment (C) of differentially expressed protein (DEP) in Chinese fir root under different treatments.

图5 差异表达蛋白(DEP)在甘氨酸代谢相关途径中富集情况(A)和甘氨酸活化难溶性铁磷过程(B)。红色箭头表示DEP在P0 vs. P1中上调表达, 绿色箭头表示DEP在P0 vs. P1中下调表达。B引用于Trevisan等(2024)。GGAT, 谷氨酸-乙二醛氨基转移酶; HAO, (S)-2-羟基酸氧化酶; TA, 苏氨酸醛缩酶。

Fig. 5 Enrichment of differentially expressed protein (DEP) in glycine metabolism-related pathways (A) and the process of glycine-mediated activation of insoluble iron phosphate (B). The red arrow indicates that the DEP were up-regulated in P0 vs. P1, and the green arrow indicates that the DEP were down-regulated in P0 vs. P1. B cited from Trevisan et al. (2024). GGAT, glutamate-glyoxylate aminotransferase; HAO, (S)-2-hydroxy-acid oxidase; TA, threonine aldolase.

图6 不同供磷水平下添加外源正癸烷后杉木苗高(A)、地径(B)、根长(C)、根表面积(D)、干物质量(E)、比根长(F)、比表面积(G)和组织密度(H)的影响(平均值±标准误)。P1, 充足供磷处理下添加正癸烷; P0, 不供磷处理下添加正癸烷。*, p < 0.05; ns, p ≥ 0.05。

Fig. 6 Effects of addition of exogenous n-decane on height (A), diameter at ground height (B), root length (C), root surface area (D), dry mass (E), specific root length (F), specific surface area (G), and tissue density (H) of Chinese fir under different phosphorus supply levels (mean ± SE). P1, addition of n-decane under sufficient phosphorus supply; P0, addition of n-decane under phosphorus-deficient conditions. *, p < 0.05; ns, p ≥ 0.05.

图7 不同处理下杉木根系磷利用效率与各形态指标之间相关性分析。P1, 充足供磷处理下添加正癸烷; P0, 不供磷处理下添加正癸烷。*, p < 0.05。B, 干物质量; GH, 地径; HS, 苗高; PUE, 磷利用效率; RL, 根长; RSA, 根表面积; SRT, 比根长; SSA, 比表面积; TD, 组织密度。

Fig. 7 Correlation analysis between phosphorus use efficiency and each index of Chinese fir under different treatments. P1, addition of n-decane under sufficient phosphorus supply; P0, addition of n-decane under phosphorus-deficient conditions. *, p < 0.05. B, dry mass; GH, ground diameter; HS, height of seedling; PUE, phosphorus use efficiency; RL, root length; RSA, root surface area; SRT, specific root length; SSA, specific surface area; TD, tissue density.

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低磷胁迫下外源挥发性有机化合物对杉木幼苗根系磷利用的影响

Effects of exogenous volatile organic compounds on phosphorus utilization in Cunninghamia lanceolata seedling roots under low phosphorus stress

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