Effects of Endophytic Fungal Inoculation on the Seedling Growth of Silage Maize

doi:10.13560/j.cnki.biotech.bull.1985.2023-1081

Abstract

Abstract:

【Objective】Endophytic fungi represent significant microbial assets that exert a beneficial influence on plant growth. The method of inoculation plays a pivotal role in determining the growth-promoting efficacy of endophytic fungi.This study aims to investigate the impact of various inoculation methods on the growth-promoting potential of endophytic fungi, thereby offering valuable insights for the practical utilization of endophytic fungi. 【Method】Four strains of endophytic fungi and Piriformospora indica of different species that could promote the growth of silage maize were screened from the endophytic fungi of desert plant roots in the early stage of the research group. Five strains of endophytic fungi were inoculated into the potted seedlings of silage maize by means of root irrigation with mycelial fragment suspension and root wrapping with mycelial mass. After 30 d, the biological characteristics of the seedlings inoculated with silage maize were determined, and the effects of different inoculation methods on the growth of silage maize were compared.【Result】The inoculation method had no significant effect on the mycelial infection rate and basal stem diameter of the five endophytic fungi in the roots of silage maize seedlings, but the other 17 traits related to the growth of silage maize were significantly affected by the inoculation method. The results of principal component analysis showed that the growth-promoting effect of the five endophytic fungi using mycelial fragment suspension root irrigation was significantly better than that of mycelial pellet root, and the difference between the two inoculation methods of P. indica and strain Tm36 was the largest. Ten traits of silage maize seedlings inoculated with P. indica and strain Tm36 were significantly different between the two inoculation methods, they were plant height, aboveground fresh weight, aboveground dry weight, average leaf area, leaf relative water content, root fresh weight, root surface area, root volume, whole plant fresh weight and whole plant dry weight. Among them, the five indexes of plant height, aboveground fresh weight, average leaf area, root fresh weight and whole plant fresh weight were the most different. The growth rate of P. indica inoculated with mycelial fragment suspension was 7.78, 3.74, 15.97, 7.93 and 5.36 times that of mycelial mass inoculation, and was 8.65 times, 4.33 times, 11.18 times, 16.58 times and 7.53 times that of inoculation strain Tm36.【Conclusion】The inoculation method significantly affects the growth-promoting effect of endophytic fungi. The inoculation method of mycelial fragment suspension root irrigation has better effect on the growth of silage maize seedlings than that of mycelial pellet root inoculation. It is recommended to use mycelial fragment suspension root irrigation method.

Key words: endophytic fungi, inoculation method, silage maize, growth promotion, mycelial fragment suspension root irrigation, mycelial mass wrapping root

WANG Jia-wei, LI Chen, LIU Jian-li, ZHOU Shi-jie, YI Jia-min, YANG Jin-yuan, KANG Peng. Effects of Endophytic Fungal Inoculation on the Seedling Growth of Silage Maize[J]. Biotechnology Bulletin, 2024, 40(4): 189-202.

Figures/Tables 11

References 40

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指标 Index	株高Plant height	基茎粗Basal stem thickness	地上鲜重Aboveground fresh weight	地上干重Above ground dry weight	地上干物质含量Above-ground dry matter content	平均叶面积 Mean leaf area	叶相对含水量Leaf relative water content	根鲜重 Fresh root weight	根干重 Root dry weight	根干物质含量Root dry matter content	根长 Root length	根表面积 Root surface area	根体积 Root volume	比根长 Specific root length	全株鲜重 Fresh weight of whole plant	全株干重 Dry weight of whole plant	全株干物质含量 Dry matter content of whole plant	根冠比 Root-shoot ratio
株高 Plant height	1
基茎粗Basal stem thickness	0.803**	1
地上鲜重 Aboveground fresh weight	0.879**	0.867**	1
地上干重 Above ground dry weight	0.782**	0.666*	0.915**	1
地上干物质含量 Above-ground dry matter content	0.666*	0.426	0.764*	0.951**	1
平均叶面积 Mean leaf area	0.727*	0.616	0.807**	0.812**	0.703*	1
叶相对含水量 Leaf relative water content	-0.748*	-0.619	-0.725*	-0.787**	-0.718*	-0.751*	1
根鲜重 Fresh root weight	0.801**	0.735*	0.873**	0.914**	0.813**	0.908**	-0.854**	1
根干重 Root dry weight	0.539	0.367	0.583	0.436	0.348	0.53	-0.095	0.331	1
根干物质含量 Root dry matter content	-0.244	-0.342	-0.286	-0.451	-0.434	-0.372	0.681*	-0.61	0.543	1
根长 Root length	0.707*	0.414	0.659*	0.659*	0.631	0.815**	-0.447	0.646*	0.766**	0.063	1
根表面积 Root surface area	0.790**	0.579	0.823**	0.822**	0.756*	0.930**	-0.642*	0.840**	0.685*	-0.178	0.938**	1
根体积 Root volume	0.827**	0.754*	0.926**	0.906**	0.779**	0.938**	-0.831**	0.962**	0.511	-0.429	0.711*	0.898**	1
比根长 Specific root length	0.482	0.307	0.32	0.465	0.51	0.495	-0.579	0.587	-0.172	-0.666*	0.475	0.515	0.435	1
全株鲜重 Fresh weight of whole plant	0.855**	0.822**	0.955**	0.944**	0.817**	0.889**	-0.831**	0.977**	0.432	-0.506	0.662*	0.854**	0.975**	0.503	1
全株干重 Dry weight of whole plant	0.806**	0.644*	0.925**	0.925**	0.853**	0.823**	-0.622	0.814**	0.745*	-0.102	0.807**	0.896**	0.886**	0.265	0.881**	1
全株干物质含量 Dry matter content of whole plant	0.083	-0.205	0.126	0.11	0.198	0.034	0.309	-0.163	0.762*	0.781**	0.46	0.29	0.009	-0.37	-0.061	0.41	1
根冠比 Root-shoot ratio	-0.668*	-0.595	-0.750*	-0.837**	-0.806**	-0.54	0.821**	-0.767**	-0.001	0.675*	-0.249	-0.483	-0.706*	-0.461	-0.791**	-0.628	0.214	1

指标 Index	株高Plant height	基茎粗Basal stem thickness	地上鲜重Aboveground fresh weight	地上干重Above ground dry weight	地上干物质含量Above-ground dry matter content	平均叶面积 Mean leaf area	叶相对含水量Leaf relative water content	根鲜重 Fresh root weight	根干重 Root dry weight	根干物质含量Root dry matter content	根长 Root length	根表面积 Root surface area	根体积 Root volume	比根长 Specific root length	全株鲜重 Fresh weight of whole plant	全株干重 Dry weight of whole plant	全株干物质含量 Dry matter content of whole plant	根冠比 Root-shoot ratio
株高 Plant height	1
基茎粗Basal stem thickness	0.803**	1
地上鲜重 Aboveground fresh weight	0.879**	0.867**	1
地上干重 Above ground dry weight	0.782**	0.666*	0.915**	1
地上干物质含量 Above-ground dry matter content	0.666*	0.426	0.764*	0.951**	1
平均叶面积 Mean leaf area	0.727*	0.616	0.807**	0.812**	0.703*	1
叶相对含水量 Leaf relative water content	-0.748*	-0.619	-0.725*	-0.787**	-0.718*	-0.751*	1
根鲜重 Fresh root weight	0.801**	0.735*	0.873**	0.914**	0.813**	0.908**	-0.854**	1
根干重 Root dry weight	0.539	0.367	0.583	0.436	0.348	0.53	-0.095	0.331	1
根干物质含量 Root dry matter content	-0.244	-0.342	-0.286	-0.451	-0.434	-0.372	0.681*	-0.61	0.543	1
根长 Root length	0.707*	0.414	0.659*	0.659*	0.631	0.815**	-0.447	0.646*	0.766**	0.063	1
根表面积 Root surface area	0.790**	0.579	0.823**	0.822**	0.756*	0.930**	-0.642*	0.840**	0.685*	-0.178	0.938**	1
根体积 Root volume	0.827**	0.754*	0.926**	0.906**	0.779**	0.938**	-0.831**	0.962**	0.511	-0.429	0.711*	0.898**	1
比根长 Specific root length	0.482	0.307	0.32	0.465	0.51	0.495	-0.579	0.587	-0.172	-0.666*	0.475	0.515	0.435	1
全株鲜重 Fresh weight of whole plant	0.855**	0.822**	0.955**	0.944**	0.817**	0.889**	-0.831**	0.977**	0.432	-0.506	0.662*	0.854**	0.975**	0.503	1
全株干重 Dry weight of whole plant	0.806**	0.644*	0.925**	0.925**	0.853**	0.823**	-0.622	0.814**	0.745*	-0.102	0.807**	0.896**	0.886**	0.265	0.881**	1
全株干物质含量 Dry matter content of whole plant	0.083	-0.205	0.126	0.11	0.198	0.034	0.309	-0.163	0.762*	0.781**	0.46	0.29	0.009	-0.37	-0.061	0.41	1
根冠比 Root-shoot ratio	-0.668*	-0.595	-0.750*	-0.837**	-0.806**	-0.54	0.821**	-0.767**	-0.001	0.675*	-0.249	-0.483	-0.706*	-0.461	-0.791**	-0.628	0.214	1

指标Index	主成分载荷Principal component load
指标Index	F1	F2	F3
株高 Plant height	0.257	0.043	-0.115
基茎粗 Basal stem thickness	0.220	-0.055	-0.448
地上鲜重 Above-ground fresh weight	0.274	0.059	-0.277
地上干重 Above-ground dry weight	0.278	-0.008	-0.043
地上干物质含量 Above-ground dry matter content	0.250	-0.008	0.145
平均叶面积 Mean leaf area	0.264	0.037	0.171
叶相对含水量 Leaf relative water content	-0.243	0.210	0.013
根鲜重 Fresh root weight	0.279	-0.104	0.021
根干重 Root dry weight	0.145	0.462	-0.080
根干物质含量 Root dry matter content	-0.127	0.477	-0.096
根长 Root length	0.220	0.255	0.399
根表面积 Root surface area	0.264	0.152	0.249
根体积 Root volume	0.282	0.003	-0.062
比根长 Specific root length	0.157	-0.253	0.587
全株鲜重 Fresh weight of whole plant	0.286	-0.047	-0.108
全株干重 Dry weight of whole plant	0.267	0.190	-0.072
全株干物质含量 Dry matter content of whole plant	0.015	0.505	0.084
根冠比 Root-shoot ratio	-0.224	0.221	0.215
主成分特征值 Eigenvalue of principal component	11.856	3.399	1.045
成分贡献率 Component contribution rate/%	65.866	18.884	5.807
累计贡献率 Cumulative contribution rate/%	65.866	84.750	90.557

指标Index	主成分载荷Principal component load
指标Index	F1	F2	F3
株高 Plant height	0.257	0.043	-0.115
基茎粗 Basal stem thickness	0.220	-0.055	-0.448
地上鲜重 Above-ground fresh weight	0.274	0.059	-0.277
地上干重 Above-ground dry weight	0.278	-0.008	-0.043
地上干物质含量 Above-ground dry matter content	0.250	-0.008	0.145
平均叶面积 Mean leaf area	0.264	0.037	0.171
叶相对含水量 Leaf relative water content	-0.243	0.210	0.013
根鲜重 Fresh root weight	0.279	-0.104	0.021
根干重 Root dry weight	0.145	0.462	-0.080
根干物质含量 Root dry matter content	-0.127	0.477	-0.096
根长 Root length	0.220	0.255	0.399
根表面积 Root surface area	0.264	0.152	0.249
根体积 Root volume	0.282	0.003	-0.062
比根长 Specific root length	0.157	-0.253	0.587
全株鲜重 Fresh weight of whole plant	0.286	-0.047	-0.108
全株干重 Dry weight of whole plant	0.267	0.190	-0.072
全株干物质含量 Dry matter content of whole plant	0.015	0.505	0.084
根冠比 Root-shoot ratio	-0.224	0.221	0.215
主成分特征值 Eigenvalue of principal component	11.856	3.399	1.045
成分贡献率 Component contribution rate/%	65.866	18.884	5.807
累计贡献率 Cumulative contribution rate/%	65.866	84.750	90.557

处理 Treatment	F1主成分得分 F1 principal component score	F2主成分得分 F2 principal component score	F3主成分得分 F3 principal component score	主成分综合得分 Principal component comprehensive score	排名 Rank
I-PI	4.172	-0.090	-0.323	2.576	1
I-Pm31	4.071	-0.350	0.381	2.504	2
I-Tm36	3.045	-0.018	0.965	1.959	3
I-Tm02	2.332	-0.789	-1.362	1.231	4
I-Cs46	1.346	-1.978	0.312	0.487	5
W-Pm31	-0.821	3.144	0.542	0.111	6
W-Cs46	-1.705	2.893	-1.573	-0.612	7
W-Tm02	-3.495	0.120	1.646	-2.069	8
W-PI	-4.030	-0.170	0.260	-2.540	9
W-Tm36	-4.916	-2.762	-0.848	-3.647	10