根内根生囊霉CD-1对5种番茄的促生作用

The Growth-promoting Effect of Rhizophagus irregularis CD- 1 on Five Tomato Varieties

为调查AM真菌在番茄上的应用效果,以5种不同番茄品种为材料,通过盆栽试验接种丛枝菌根（AM）真菌根内根生囊霉CD-1（Rhizophagus irregularis CD-1）,研究不同番茄品种间根系菌根侵染效率的差异,以及AM真菌对5种番茄品种的促生作用。结果显示,5种番茄都能与供试真菌建立共生关系,在番茄根部观察到丛枝菌根真菌的各种形态,包括泡囊、菌丝、孢子和丛枝,根系菌根侵染率都达到90%以上,并且品种间侵染率没有显著差异。测定番茄接种丛枝菌根后各种农艺性状指标,结果表明AM真菌能显著提高5种番茄的株高、叶柄数、地上鲜重、地上干重、根鲜重和根干重。其中番茄品种Z34的株高和地上部鲜重提高倍数最高,分别提高了1.05倍和2.12倍;Z30的叶柄数和地上部干重提高倍数最高,分别提高了0.27倍和2.22倍;Z33的根干种和根鲜重提高倍数最高,分别提高了9倍和3.8倍。5种番茄的菌根依存度为58.75%-72.11%,说明AM真菌的存在可促进5种番茄的生长。综上所述,丛枝菌根Rhizophagus irregularis CD-1可以与不同的番茄品种形成良好的共生关系,并能显著促进番茄植株生长和发育,具有良好的应用价值。本研究可为AM真菌在番茄上的大规模应用提供理论依据和技术支持。

In order to investigate the differences of roots mycorrhizal infection efficiency between different tomato varieties and influence of arbuscular mycorrhizal（ AM） fungi on tomato growth,a pot experiment was carried out between five different tomato varieties and Rhizophagus irregularis CD- 1. This study was designed to investigate the effect of AM fungi on tomato varieties. Results showed that all tested tomato varieties could establish a symbiotic relationship with AM fungi,which were observed in tomato roots as various forms,including vesicle,hyphae,spores,and arbuscule,and no significant differences in all root infection rates（ over than 90%） were observed among tomato varieties. The agronomic traits of all tomato varieties revealed that AM fungi could significantly improve plant height,number of petiole,shoot fresh weight,shoot dry weight,root fresh weight,and root dry weight of five tomato varieties. Plant height and shoot fresh weight of tomato varieties Z34 were increased by 1. 05 and 2. 12 times,respectively. The highest increase varieties in petiole number and shoot dry weight was Z30,with an increase of 0. 27 and 2. 22 times,respectively. Z33 showed the highest increase in root dry weight and root fresh weight,with an increase of 9 and 3. 8 times,respectively. AM dependence of all tomato varieties was 58. 75% to 72. 11%,as a consequence,the AM fungi could promote the growth of tomato varieties. These data suggest that the Rhizophagus irregularis CD- 1 can significantly promote tomato growth,and have a nice application prospect. This study will provide theoretical basis and technical support for the large-scale application of AM fungi on the tomato in the future.