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首页> 外文期刊>Frontiers in Microbiology >Inoculation of Soil with Plant Growth Promoting Bacteria Producing 1-Aminocyclopropane-1-Carboxylate Deaminase or Expression of the Corresponding acdS Gene in Transgenic Plants Increases Salinity Tolerance in Camelina sativa
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Inoculation of Soil with Plant Growth Promoting Bacteria Producing 1-Aminocyclopropane-1-Carboxylate Deaminase or Expression of the Corresponding acdS Gene in Transgenic Plants Increases Salinity Tolerance in Camelina sativa

机译：用植物生长促进细菌生产1-氨基环丙烷-1-羧酸脱氨酶接种土壤或在转基因植物中表达相应的 acdS 基因可提高 Camelina sativa 的耐盐性

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Camelina sativa (camelina) is an oilseed crop touted for use on marginal lands; however, it is no more tolerant of soil salinity than traditional crops, such as canola. Plant growth-promoting bacteria (PGPB) that produce 1-aminocyclopropane-1-carboxylate deaminase (ACC deaminase) facilitate plant growth in the presence of abiotic stresses by reducing stress ethylene. Rhizospheric and endophytic PGPB and the corresponding acdS- mutants of the latter were examined for their ability to enhance tolerance to salt in camelina. Stimulation of growth and tolerance to salt was correlated with ACC deaminase production. Inoculation of soil with wild-type PGPB led to increased shoot length in the absence of salt, and increased seed production by approximately 30–50% under moderately saline conditions. The effect of ACC deaminase was further examined in transgenic camelina expressing a bacterial gene encoding ACC deaminase ( acdS ) under the regulation of the CaMV 35S promoter or the root-specific rolD promoter. Lines expressing acdS , in particular those using the rolD promoter, showed less decline in root length and weight, increased seed production, better seed quality and higher levels of seed oil production under salt stress. This study clearly demonstrates the potential benefit of using either PGPB that produce ACC deaminase or transgenic plants expressing the acdS gene under the control of a root-specific promoter to facilitate plant growth, seed production and seed quality on land that is not normally suitable for the majority of crops due to high salt content.
机译：茶树（Camelina sativa）是一种油料作物，被吹捧用于边际土地。但是，它对土壤盐分的耐受性并不比传统农作物（例如油菜）高。产生1-氨基环丙烷-1-羧酸酯脱氨酶（ACC脱氨酶）的植物生长细菌（PGPB）通过减少胁迫乙烯来促进非生物胁迫下的植物生长。检查了根际和内生的PGPB以及后者的相应acdS-突变体增强骆驼科植物对盐的耐受性的能力。刺激生长和对盐的耐受性与ACC脱氨酶的产生有关。在不加盐的情况下，用野生型PGPB接种土壤会导致芽长增加，在中等盐度条件下，种子产量增加约30–50％。在表达编码ACC脱氨酶（acdS）的细菌基因的转基因油茶中，在CaMV 35S启动子或根特异性rolD启动子的调控下，进一步检查了ACC脱氨酶的作用。表达acdS的品系，特别是那些使用rolD启动子的品系，在盐胁迫下显示出更少的根长和重量下降，增加的种子产量，更好的种子质量和更高的种子油产量水平。这项研究清楚地表明，使用产生ACC脱氨酶的PGPB或在根特异启动子控制下表达acdS基因的转基因植物来促进植物生长，种子生产和土地上通常不适合种子质量的潜在益处。大部分农作物由于含盐量高。

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