The effect of plant growth-promoting rhizobacteria on asparagus seedlings and germinating seeds subjected to water stress under greenhouse conditions
The effect of plant growth-promoting rhizobacteria on asparagus seedlings and germinating seeds subjected to water stress under greenhouse conditions
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DOI：
10.1139/w08-144
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发表时间：
2009-04-01
影响因子：
2.8
通讯作者：
Wolyn, David J.
中科院分区：
文献类型：
--
作者：
Liddycoat, Scott M.;Greenberg, Bruce M.;Wolyn, David J.
植物根际促生菌（PGPR）可以对植物的活力和生产力产生积极的影响，特别是在胁迫条件下。芦笋（Asparagus officinalis L.）大田栽培，种子种植于高密度苗圃，1年生树冠移栽于生产田。水分胁迫、移植休克和伤根上的疾病压力会对性能产生负面影响。PGPR接种有可能减轻生产系统中发生的一些压力。在这项研究中，PGPR（假单胞菌属）的影响，对2个芦笋品种的3周龄温室生长的幼苗和萌发的种子进行了测定。将盆灌溉至导致最佳生长的预定水平，或者使植物经受干旱或淹水胁迫8周。不同品种对PGPR的反应不同：在最佳条件下，单次接种促进了“圭尔夫千年”幼苗的生长，而在干旱胁迫下促进了“泽西巨人”幼苗的生长。种子接种PGPR导致了积极的反应，只有“圭尔夫千年”，无论是单一或多个接种增强植物生长在干旱胁迫下。
Plant growth-promoting rhizobacteria (PGPR) can have positive effects on vigour and productivity, especially under stress conditions. In asparagus (Asparagus officinalis L.) field culture, seeds are planted in high-density nurseries, and 1-year-old crowns are transplanted to production fields. Performance can be negatively affected by water stress, transplant shock, and disease pressure on wounded roots. PGPR inoculation has the potential to alleviate some of the stresses incurred in the production system. In this study, the effects of PGPR (Pseudomonas spp.) treatment were determined on 3-week-old greenhouse-grown seedlings and germinating seeds of 2 asparagus cultivars. The pots were irrigated to a predetermined level that resulted in optimum growth or the plants were subjected to drought or flooding stress for 8 weeks. The cultivars responded differently to PGPR: single inoculations of seedlings enhanced growth of 'Guelph Millennium' under optimum conditions and 'Jersey Giant' seedlings under drought stress. Seed inoculations with PGPR resulted in a positive response only for 'Guelph Millennium', for which both single or multiple inoculations enhanced plant growth under drought stress.