丛枝菌根菌丝桥介导刺槐-魔芋间碳转运和磷吸收

doi:10.17521/cjpe.2022.0185

植物生态学报 ›› 2023, Vol. 47 ›› Issue (6): 782-791.DOI: 10.17521/cjpe.2022.0185

丛枝菌根菌丝桥介导刺槐-魔芋间碳转运和磷吸收

何斐¹^,^*(), 李川¹, Faisal SHAH², 卢谢敏¹, 王莹¹, 王梦¹, 阮佳¹, 魏梦琳¹, 马星光¹, 王卓¹, 姜浩¹

¹安康学院现代农业与生物科技学院, 陕西安康 725000
²Department of Agronomy, The University of Agriculture, Peshawar (UAP), Peshawar, Khyber Pakhtunkhwa 23060, Pakistan

收稿日期:2022-05-09 接受日期:2022-10-10 出版日期:2023-06-20 发布日期:2022-10-10
通讯作者: * E-mail: hefei6000@163.com
基金资助:
国家自然科学基金(31901468);陕西省重点研发计划(2021NY-048);陕西省创新人才推进计划(2020KJXX-003)

Carbon transport and phosphorus uptake in an intercropping system of Robinia pseudoacacia and Amorphophallus konjac mediated by arbuscular mycorrhizal hyphal networks

HE Fei¹^,^*(), LI Chuan¹, Faisal SHAH², LU Xie-Min¹, WANG Ying¹, WANG Meng¹, RUAN Jia¹, WEI Meng-Lin¹, MA Xing-Guang¹, WANG Zhuo¹, JIANG Hao¹

¹School of Modern Agriculture & Biotechnology, Ankang University, Ankang, Shaanxi 725000, China
²Department of Agronomy, The University of Agriculture, Peshawar (UAP), Peshawar, Khyber Pakhtunkhwa 23060, Pakistan

Received:2022-05-09 Accepted:2022-10-10 Online:2023-06-20 Published:2022-10-10
Supported by:
National Natural Science Foundation of China(31901468);Key Research and Development Program of Shaanxi Province(2021NY-048);Innovation Capacity Support Plan of Shaanxi Province(2020KJXX-003)

摘要/Abstract

摘要：

明确间作和接种丛枝菌根真菌(AMF)对刺槐(Robinia pseudoacacia)与魔芋(Amorphophallus konjac)碳转运和磷吸收的影响, 可为揭示间作刺槐对魔芋的防病促生机制和推广刺槐林下魔芋绿色高产栽培技术提供科学依据。该研究使用孔径25 μm尼龙网设置两室根箱隔网系统, 分为A室(刺槐不接种/接种AMF)和B室(单作刺槐/刺槐间作魔芋); 采用¹³C稳定性同位素技术对A室刺槐叶片进行标记, 研究其同化的碳与B室魔芋之间的传递, 以及AMF定植对两种作物的农艺性状、¹³C丰度和磷含量的影响。结果表明: (1)在接种条件下, 菌丝桥对B室刺槐和魔芋的侵染率分别达到47.1%和60.4%; 其中, 刺槐侵染率与单作直接接种处理相比降低14.1%。在间作体系中, 接种AMF提高了魔芋的生物量, 其地上干质量和地下根系干质量分别较未接种处理显著增加9.7%和36.2%。(2)与单作未接种处理相比, 间作未接种、单作接种和间作接种的刺槐同化的碳被更多地分配到根系和根际土壤(A室), 并以根系分泌物的形式穿越尼龙网到达邻近作物根际(B室)。(3)与各自未接种处理相比, 单作或间作接种显著提高B室刺槐和魔芋叶片、茎/叶柄、根系和全株磷含量。综上, AMF定植促进了刺槐向魔芋根际土和植株体内的碳转运, 且间作栽培可促进AMF的定植和宿主作物对磷的吸收。

关键词: 刺槐, 魔芋, 丛枝菌根真菌, ¹³C丰度, 根系分泌物

Abstract:

Aims The aim of this research was to clarify the effects of intercropping and inoculation with arbuscular mycorrhizal fungi (AMF) on carbon transport and phosphorus uptake in black locust (Robinia pseudoacacia) and konjac (Amorphophallus konjac). The results could provide empirical evidence to reveal the mechanisms of black locust intercropping for disease control and plant growth promotion of konjac, and popularize the green and high-yielding cultivation technique of konjac under black locust.

Methods The experiment was carried out in two-compartment rhizoboxes separated by a 25-μm nylon net, each of which comprised compartment A (non-inoculated or AMF-inoculated black locust) and compartment B (monocropped black locust or intercropped konjac). A ¹³C stable isotope labeling technique was used to label the leaves of black locust in compartment A with ¹³CO₂. Carbon transport from black locust to konjac and the effects of AMF colonization on agronomic traits, ¹³C abundance, and phosphorus content in both crops were investigated.

Important findings The result showed that: (1) After inoculation, the AMF infection rate of black locust and konjac plants by hyphal links in compartment B reached 47.1% and 60.4%, respectively. For black locust, this AMF infection rate was 14.1% lower than that of directly inoculated plants under monocropping. In the case of intercropping, the biomass (dry mass) of AMF-inoculated konjac plants was 9.7% (aboveground parts) and 36.2% (belowground roots) higher than that of non-inoculated plants. (2) Compared with the non-inoculated plants under monocropping, the carbon fixed by photosynthesis of black locust plants in other treatments (non-inoculated + intercropping, inoculated + monocropping, and inoculated + intercropping) was mainly allocated to the plant roots and rhizosphere soil in compartment A, and more carbon passed through the nylon net in the form of root exudates to reach the rhizosphere of neighboring crop plants. (3) Compared with the respective non-inoculated controls, AMF inoculation in the monocropping and intercropping systems prominently improved phosphorus contents in the leaves, stems/petioles, roots, and total plants of black locust and konjac in compartment B. The findings suggest that AMF colonization could facilitate carbon transport from black locust to the rhizosphere soil and plant tissues of konjac. Intercropping konjac with black locust is an effective practice to promote AMF colonization and phosphorus uptake by both host plants.

Key words: Robinia pseudoacacia, Amorphophallus konjac, arbuscular mycorrhizal fungi, ¹³C abundance, root exudate

何斐, 李川, Faisal SHAH, 卢谢敏, 王莹, 王梦, 阮佳, 魏梦琳, 马星光, 王卓, 姜浩. 丛枝菌根菌丝桥介导刺槐-魔芋间碳转运和磷吸收. 植物生态学报, 2023, 47(6): 782-791. DOI: 10.17521/cjpe.2022.0185

HE Fei, LI Chuan, Faisal SHAH, LU Xie-Min, WANG Ying, WANG Meng, RUAN Jia, WEI Meng-Lin, MA Xing-Guang, WANG Zhuo, JIANG Hao. Carbon transport and phosphorus uptake in an intercropping system of Robinia pseudoacacia and Amorphophallus konjac mediated by arbuscular mycorrhizal hyphal networks. Chinese Journal of Plant Ecology, 2023, 47(6): 782-791. DOI: 10.17521/cjpe.2022.0185

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链接本文: https://www.plant-ecology.com/CN/10.17521/cjpe.2022.0185

https://www.plant-ecology.com/CN/Y2023/V47/I6/782

图/表 7

图1 两室根箱隔网系统。

Fig. 1 Two-compartment root system separated by a nylon net.

表1 刺槐与魔芋两室根箱隔网系统实验处理

Table 1 Treatments in the two-compartment root system of Robinia pseudoacacia and Amorphophallus konjac

处理 Treatment	A室植物 Plant in compartment A	A室处理 Treatment in compartment A	B室植物 Plant in compartment B	种植方式 Cropping pattern
M-AMF	刺槐 Robinia pseudoacacia	未接种 Non-inoculated	刺槐 R. pseudoacacia	单作 Monocropping
I-AMF	刺槐 R. pseudoacacia	未接种 Non-inoculated	魔芋 Amorphophallus konjac	间作 Intercropping
M+AMF	刺槐 R. pseudoacacia	接种 Inoculated	刺槐 R. pseudoacacia	单作 Monocropping
I+AMF	刺槐 R. pseudoacacia	接种 Inoculated	魔芋 A. konjac	间作 Intercropping

表2 接种丛枝菌根真菌(AMF)后刺槐和魔芋的侵染状况(平均值±标准差)

Table 2 Infection status of Robinia pseudoacacia and Amorphophallus konjac plants after inoculation with arbuscular mycorrhizal fungi (AMF) (mean ± SD)

分室 Compartment	植物 Plant	处理 Treatment	AMF侵染率 AMF infection rate (%)	丛枝丰度 Arbuscular abundance (%)	侵染强度 Infection intensity (%)
A室 Compartment A	刺槐 R. pseudoacacia	M+AMF	54.8 ± 3.2^b	2.9 ± 0.2^b	6.8 ± 0.7^b
A室 Compartment A	刺槐 R. pseudoacacia	I+AMF	62.0 ± 0.3^a	4.8 ± 0.2^a	10.0 ± 0.2^a
B室 Compartment B	刺槐 R. pseudoacacia	M+AMF	47.1 ± 2.0^c	1.0 ± 0.1^c	2.2 ± 0.2^c
B室 Compartment B	魔芋 A. konjac	I+AMF	60.4 ± 6.6^a	4.6 ± 0.2^a	9.5 ± 0.6^a

表3 间作和接种丛枝菌根真菌(AMF)对刺槐和魔芋农艺性状的影响(平均值±标准差)

Table 3 Effects of intercropping and arbuscular mycorrhizal fungi (AMF) inoculation on agronomic traits in Robinia pseudoacacia and Amorphophallus konjac (mean ± SD)

分室 Compartment	植物 Plant	处理 Treatment	株高 Plant height (cm)	地径 Ground diameter (mm)	地上干质量 Aboveground dry mass (g·plant^-1)	根系干质量 Root dry mass (g·plant^-1)
A室 Compartment A	刺槐 R. pseudoacacia	M-AMF	6.67 ± 0.03^e	1.71 ± 0.02^c	1.15 ± 0.06^f	0.10 ± 0.01^g
	刺槐 R. pseudoacacia	I-AMF	6.94 ± 0.14^e	1.72 ± 0.02^c	1.42 ± 0.08^e	0.21 ± 0.03^ef
	刺槐 R. pseudoacacia	M+AMF	10.83 ± 0.09^cd	1.81 ± 0.01^c	2.78 ± 0.14^c	0.32 ± 0.05^d
	刺槐 R. pseudoacacia	I+AMF	11.83 ± 0.09^c	1.81 ± 0.02^c	2.82 ± 0.18^c	1.04 ± 0.05^c
B室 Compartment B	刺槐 R. pseudoacacia	M-AMF	6.83 ± 0.11^e	1.71 ± 0.01^c	1.12 ± 0.12^f	0.15 ± 0.04^fg
	魔芋 A. konjac	I-AMF	23.80 ± 1.10^b	13.30 ± 0.40^b	13.54 ± 0.14^b	1.99 ± 0.02^b
	刺槐 R. pseudoacacia	M+AMF	10.61 ± 0.12^d	1.80 ± 0.00^c	2.20 ± 0.05^d	0.23 ± 0.01^e
	魔芋 A. konjac	I+AMF	26.72 ± 1.33^a	15.11 ± 0.62^a	14.85 ± 0.11^a	2.71 ± 0.08^a

图2 不同处理13C在刺槐-土壤-魔芋中的转运(平均值±标准差)。处理同表1。不同小写字母表示处理间差异显著(p < 0.05)。

Fig. 2 13C transport in the Robinia pseudoacacia-soil-Amorphophallus konjac system under different treatments (mean ± SD). See Table 1 for treatments. Different lowercase letters indicate significant differences among treatments (p < 0.05).

图3 刺槐和魔芋叶片(A)、茎/叶柄(B)、根系(C)、全株(D)磷(P)含量和根际土壤速效P含量(E) (平均值±标准差)。处理同表1。不同小写字母表示处理间差异显著(p < 0.05)。rhizobox, 根箱单室。

Fig. 3 Phosphorus (P) content in the leaves (A), stems or petioles (B), roots (C), and total plants (D), and available P concentration in the rhizosphere soils (E) of Robinia pseudoacacia and Amorphophallus konjac (mean ± SD). See Table 1 for treatments. Different lowercase letters indicate significant differences among treatments (p < 0.05). rhizobox, single compartment in rhizobox.

图4 刺槐和魔芋菌根真菌(AMF)侵染状况、植株农艺性状、13C丰度与磷含量的Pearson相关系数(r)。1, AMF侵染率; 2, 丛枝丰度; 3, AMF侵染强度; 4, 地上干质量; 5, 根系干质量; 6, 株高; 7, 地径; 8, 叶片13C丰度; 9, 根系13C丰度; 10, 土壤13C丰度; 11, 叶片磷含量; 12, 茎/叶柄磷含量; 13, 根系磷含量; 14, 土壤速效磷含量; 15, 全株磷含量。*, p < 0.05; **, p < 0.01。

Fig. 4 Pearson’s correlation coefficients (r) between arbuscular mycorrhizal fungi (AMF) infection, plant agronomic traits, 13C abundance, and phosphorus (P) content of Robinia pseudoacacia and Amorphophallus konjac. 1, AMF infection rate; 2, arbuscular abundance; 3, AMF infection intensity; 4, aboveground dry mass; 5, root dry mass; 6, plant height; 7, ground diameter; 8, leaf 13C abundance; 9, root 13C abundance; 10, soil 13C abundance; 11, leaf P content; 12, stem or petiole P content; 13, root P content; 14, soil available P content; 15, total plant P content. *, p < 0.05; **, p < 0.01.

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丛枝菌根菌丝桥介导刺槐-魔芋间碳转运和磷吸收

Carbon transport and phosphorus uptake in an intercropping system of Robinia pseudoacacia and Amorphophallus konjac mediated by arbuscular mycorrhizal hyphal networks

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