Host genotype overrides endophyte infection effects on growth, physiology, and nutrient content of a native grass, Achnatherum sibiricum
Host genotype overrides endophyte infection effects on growth, physiology, and nutrient content of a native grass, Achnatherum sibiricum
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DOI：
10.1007/s11258-014-0339-6
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发表时间：
2014-05
期刊：
影响因子：
1.7
通讯作者：
T. Jia;A. Ren;Yu-bao Gao
中科院分区：
文献类型：
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作者：
T. Jia;A. Ren;Yu-bao Gao
研究了内生真菌Neotyphodium、寄主基因型及其互作对野生牧草西伯利亚稗生长、生理和光合作用的影响。将内生菌人工接种到无内生菌A.西伯利亚。在记录生长性状后将植物修剪至5cm高度，并分析修剪前后叶中的总非结构性碳水化合物（TNC %）、氮（N %）和碳（C %）的百分比。在我们的研究中，在A. sibiricum的研究表明，对于许多生长和储存性状，内生菌感染可以影响一点变化。然而，没有压倒性的一致的积极影响的内生菌的生长或存储在A。sibiricum之前或之后修剪。我们的研究表明，内生菌和宿主草之间的相互作用是高度依赖于植物基因型。结果表明，内生真菌侵染对小麦分蘖数和光合特性的影响不受寄主基因型的影响。sibiricum前剪辑。刈割后，寄主基因型对再生量和地上生物量的影响更大。sibiricumthan内生菌感染。本研究表明，宿主基因型影响了A.内生真菌感染使剪叶后碳含量增加。基因型感染相互作用的株高，叶质量，总非结构性碳水化合物，和光合特性表明基因型特异性影响内生菌对A。生理和光合能力。在A.西伯利亚草表明，宿主基因型超越真菌内生菌感染对这种天然草生长、生理和营养含量的影响。相反，内生菌的影响没有出现积极影响生长，生理，或光合能力之前或之后修剪。
The effect of infection by the fungal endophyteNeotyphodium, host genotype, and their interaction on growth and physiology, as well as photosynthesis, was investigated in the native grassAchnatherum sibiricum. We artificially inoculated the endophyte into mature tillers of endophyte-freeA. sibiricum. Plants were clipped to 5 cm height after recording growth traits, and analyzed for total nonstructural carbohydrates (TNC %), the percentage of nitrogen (N %), and carbon (C %) in leaves before and after clipping. In our study, the prominent host genotype–endophyte infection interactions detected inA. sibiricumindicates that, for many growth and storage traits, endophyte infection can impact a little change. However, there is no overriding consistently positive effect of the endophyte on growth or storage inA. sibiricumbefore or after clipping. Our study showed that the interaction between endophyte and host grasses was highly contingent on plant genotypes. We found host genotype overrode fungal endophyte infection in influencing tiller number and photosynthetic properties ofA. sibiricumbefore clipping. After clipping, host genotype accounted for more of the variation in regrowth and above-ground biomass ofA. sibiricumthan endophyte infection. Our study showed that host genotype affected the total nonstructural carbohydrates ofA. sibiricumbefore and after clipping, whereas endophyte infection increased the carbon content after clipping. Genotype by infection interactions for plant height, leaf mass, total nonstructural carbohydrates, and photosynthetic characteristics indicated genotype-specific effects of endophytes onA. sibiricumphysiology and photosynthetic capacity. The host genotype–endophyte infection interactions detected inA. sibiricumsuggest that host genotype overrides fungal endophyte infection on growth, physiology, and nutrient content of this native grass. In contrast, endophyte effects did not appear to positively affect growth, physiology, or photosynthetic capacity before or after clipping.