接种幼套球囊霉对干旱生境中构树幼苗根系形态的影响
Effects ofGlomus etunicatum Inoculation on RootMorpho logy ofBroussonetiapapyrifera Seedlings underWater Stress
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摘要: 利用W inRh izo根系分析系统, 在石灰土基质上对不同土壤水分条件下接种丛枝菌根真菌幼套球囊霉对构树幼苗根系形态特征的影响进行了研究。结果表明: 土壤水分状况和接种丛枝菌根真菌对构树幼苗生物量积累产生了显著的影响; 构树幼苗根系干质量、总长度、表面积、体积、根节数目、根系平均直径均随着土壤含水量的降低而降低, 幼套球囊霉则降低了同等水分条件下构树幼苗的比根长; 土壤水分和接种幼套球囊霉同样也对根节平均长度产生了影响。Abstract: Effects o f G lomus etunicatum and w ater stress on morpho logy of root system in B roussonetia papyrif eraseedlings were stud ied based on scanner-based image analysis. The results show ed that drought and AM inocu lationhad a large, significant effect on p lant developmen.t Roo t biomass, total root length, root surface area, root vo lume, number o f roo t links and average diameter of root system in B roussonetia papyrif era decreased w ith the reduct ion o f so ilmo isture, w hile theyw ere increased byVAM inocu lation. Spec ial root length in non-AM plants increasedwhen soilmo isturew as reducing, but it w as decreased by AM inoculation.
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Key words:
- Glomus etunicatum
- / Broussonetia papyrif era
- / roo tmorpho logy
- / seed ling
- / water stress
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