Plant growth promoting rhizobacteria are more effective under drought: a meta-analysis

Plant growth promoting rhizobacteria are more effective under drought: a meta-analysis
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促进植物生长的根际细菌在干旱下更有效:荟萃分析

DOI:
10.1007/s11104-017-3199-8
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发表时间:
2017
期刊:
影响因子:
4.9
通讯作者:
Hungate, Bruce A.
Hungate, Bruce A.
中科院分区:
农林科学2区
文献类型:
--
作者:
Rubin, Rachel L.;van Groenigen, Kees Jan;Hungate, Bruce A.

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植物根际促生菌(PGPR)已被证明可以减轻植物的非生物胁迫,但这些效应还没有被定量地综合。我们评估的程度,促进植物生长的根际细菌(PGPR)提高植物的性能,并没有干旱stress.MethodsWe采用荟萃分析总结52发表的文章,PGPR对根质量,地上部质量和产量的影响在良好的浇水和干旱条件下。我们还问是否施肥处理,实验条件下,接种物分类的复杂性,植物功能组,或接种物的传递方法引入变化的影响大小的PGPR.ResultsAcross所有治疗,植物高度响应PGPR;在良好的浇水条件下,根质量增加了35%,芽质量增加了28%,繁殖产量增加了19%。在干旱条件下,效果更高:根质量增加43%,地上部质量增加45%,生殖产量增加40%。干旱条件下,PGPR对地上部质量和生殖产量的影响显著大于对照(p <0.05),但对根质量的影响不显著。PGPR的反应也不同,根据植物功能组,C3草芽生产响应最不强烈PGPR.ConclusionsWe表明,PGPR是非常有效的,以提高植物生长,在干旱的地上部性状的影响更大。虽然以前知道他们的生物控制能力,我们表明,PGPR也可能有助于干旱改善和节水。
Background and aimsPlant growth promoting rhizobacteria (PGPR) have been shown to reduce abiotic stress on plants, but these effects have not been quantitatively synthesized. We evaluated the degree to which plant growth promoting rhizobacteria (PGPR) improve plant performance with and without drought stress.MethodsWe used meta-analysis to summarize 52 published articles on the effects of PGPR on root mass, shoot mass and yield under well-watered and drought conditions. We also asked whether fertilization treatments, experimental conditions, inoculum taxonomic complexity, plant functional group, or inoculum delivery method introduce variation in the effect size of PGPR.ResultsAcross all treatments, plants were highly responsive to PGPR; under well-watered conditions, root mass increased by 35%, shoot mass increased by 28%, and reproductive yield increased by 19%. Under drought conditions, the effect was even higher: root mass increased by 43%, shoot mass increased by 45%, and reproductive yield increased by 40%. The effect of PGPR was significantly larger under drought for shoot mass (p< 0.05) and reproductive yield (p< 0.05), but not for root mass. PGPR responsiveness also varied according to plant functional group, with C3grass shoot production responding the least strongly to PGPR.ConclusionsWe demonstrate that PGPR are highly effective for improving plant growth, with a greater effect under drought for above ground traits. While previously known for their bio-control abilities, we show that PGPR may also contribute to drought amelioration and water conservation.
DOI: 10.1139/b90-061
发表时间: 1990-03-01
期刊: CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE
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