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首页> 外文期刊>Scientific reports. >Molecular interaction of 1-aminocyclopropane-1-carboxylate deaminase (ACCD)-producing endophytic Streptomyces sp. GMKU 336 towards salt-stress resistance of Oryza sativa L. cv. KDML105
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Molecular interaction of 1-aminocyclopropane-1-carboxylate deaminase (ACCD)-producing endophytic Streptomyces sp. GMKU 336 towards salt-stress resistance of Oryza sativa L. cv. KDML105

机译：1-氨基环丙烷-1-羧酸盐脱氨酶（ACCD）的分子相互作用 - 发挥内生细胞链霉菌SP。 GMKU 336抗盐胁迫抗盐胁迫性抗盐膜抗粘膜。 KDML105

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1-aminocyclopropane-1-carboxylate deaminase (ACCD)-producing endophytic Streptomyces sp. GMKU?336 and its ACCD-deficient mutant were inoculated into Thai jasmine rice Khao Dok Mali 105 cultivar (Oryza sativa L. cv. KDML105) under salt stress (150?mM NaCl) conditions. The results clearly indicated that Streptomyces sp. GMKU?336 significantly increased plant growth, chlorophyll, proline, K+, Ca+, and water contents; but decreased ethylene, reactive oxygen species (ROS), Na+, and Na+/K+ ratio when compared to plants not inoculated and those inoculated with the ACCD-deficient mutant. Expression profiles of stress responsive genes in rice in association with strain GMKU 336 were correlated to plant physiological characteristics. Genes involved in the ethylene pathway, ACO1 and EREBP1, were significantly down-regulated; while acdS encoding ACCD in Streptomyces sp. GMKU 336 was up-regulated in vivo. Furthermore, genes involved in osmotic balance (BADH1), Na+ transporters (NHX1 and SOS1), calmodulin (Cam1-1), and antioxidant enzymes (CuZn-SOD1 and CATb) were up-regulated; whereas, a gene implicated in a signaling cascade, MAPK5, was down-regulated. This work demonstrates the first time that ACCD-producing Streptomyces sp. GMKU 336 enhances growth of rice and increases salt tolerance by reduction of ethylene via the action of ACCD and further assists plants to scavenge ROS, balance ion content and osmotic pressure.
机译：1-氨基环丙烷-1-羧酸盐脱氨酶（ACCD） - 同种异体脱霉菌酶SP。 GMKU？336及其ACCD缺陷型突变体接种到盐胁迫下（150毫米NaCl）条件下的泰国茉莉花稻Khao Dok Mali 105品种（Oryza Sativa L.CV.KDML105）。结果清楚地表明Streptomyces sp。 GMKU？336显着增加了植物生长，叶绿素，脯氨酸，K +，Ca +和水含量;与未接种的植物相比，乙烯，反应性氧物质（ROS），Na +和Na + / k +比率下降，与缺乏缺陷型突变体接种的植物。与菌株GMKU 336相关联的压力响应基因的表达谱与植物生理特性相关。参与乙烯途径，ACO1和eREBP1的基因显着下调;虽然ACD在Streptomyces SP中编码ACCD。 Gmku 336在体内上调。此外，涉及渗透平衡（BADH1），Na +转运蛋白（NHX1和SOS1），钙调蛋白（CAM1-1）和抗氧化酶（CUZN-SOD1和CATB）的基因被上调;然而，涉及在信号级联，MAPK5中的基因被下调。这项工作首次展示了产生肌腱霉菌SP的第一次。 GMKU 336通过ACCD的作用，增强水稻的生长，并通过减少乙烯来增加乙烯，并进一步帮助植物清除ROS，平衡离子含量和渗透压。

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