疣状黄腐菌、大黄枝和细杆菌在牛痘下胚轴扦插纤维根和先根上的离体接种效果及定殖模式

IF 1 Q3 PLANT SCIENCES Plant Root Pub Date : 2021-01-01 DOI:10.3117/PLANTROOT.15.1
T. Baba, D. Hirose, T. Ban
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引用次数: 3

摘要

白垩系植物的细根既有吸收性纤维根,又有骨骼先锋根。这种功能分化(异质性)可以与特定的菌根形成模式相结合,其中纤维根比先锋根形成更多的镰刀状菌根。然而,根相关真菌在不同个体根上的行为在很大程度上仍然未知。摘要研究了疣状黄腐菌(Leohumicola verrucosa)、大毛象枝(Oidiodendron maus)和细杆菌(Leptobacillium leptobacillum) 3种菌种在老牛苗下胚轴扦插上的定植模式和根修饰。3株推定菌根真菌(1株疣状菌根真菌和2株麦氏菌根真菌)表现出典型的异根定植模式,并倾向于增加先驱根分枝。然而,根内生真菌(L. leptobactrum)在不同根上的定殖均较低,并且没有增加先锋根枝的数量。菌根真菌的定殖模式与根修饰能力之间可能存在联系,从而保证有足够的定殖位点。
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In vitro inoculation effects and colonization pattern of Leohumicola verrucosa, Oidiodendron maius, and Leptobacillium leptobactrum on fibrous and pioneer roots of Vaccinium oldhamii hypocotyl cuttings
The fine root systems of ericaceous plants possess both absorptive fibrous roots and skeletal pioneer roots. This functional differentiation (heterorhizy) can be coupled with a specific mycorrhization pattern, in which fibrous roots form more ericoid mycorrhizas than pioneer roots. However, the behaviors of root-associated fungi on the different individual roots remain largely unknown. We investigated the colonization patterns and root modifications of Leohumicola verrucosa, Oidiodendron maius, and Leptobacillium leptobactrum strains on Vaccinium oldhamii hypocotyl cuttings in vitro. Three putative and true mycorrhizal fungal strains (one L. verrucosa and two O. maius) exhibited typical heterorhizic colonization patterns and tended to increase pioneer root branching. However, a root endophytic fungus (L. leptobactrum) uniformly exhibited a lower colonization across the different roots and did not increase the number of pioneer root branches. The colonization patterns and root modification ability of mycorrhizal fungi may be linked, thereby ensuring sufficient colonization sites.
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来源期刊
Plant Root
Plant Root PLANT SCIENCES-
CiteScore
1.50
自引率
0.00%
发文量
2
期刊介绍: Plant Root publishes original papers, either theoretical or experimental, that provide novel insights into plant roots. The Journal’s subjects include, but are not restricted to, anatomy and morphology, cellular and molecular biology, biochemistry, physiology, interactions with soil, mineral nutrients, water, symbionts and pathogens, food culture, together with ecological, genetic and methodological aspects related to plant roots and rhizosphere. Work at any scale, from the molecular to the community level, is welcomed.
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