The effect of plant growth promoting potentials of rhizosphere bacteria isolated from several halophytic species on vegetative growth and ionic content of wheat

yfthhy nwyn dr `lwm zysty Pub Date : 2021-07-01 DOI:10.52547/nbr.8.2.104

alireza Amini Hajiabadi, A. Mosleh Arani, Someh Ghasemi, M. H. Rad, Shima Shabazi, H. Etesami

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引用次数: 1

Abstract

. Salinity stress is an important challenge for wheat production in the world. Plant growth promoting rhizosphere bacteria, isolated from halophytic plants, can increase the tolerance of crop plants to salinity by direct and indirect mechanisms. In this study, plant growth-promoting traits of bacterial strains ( Bacillus safensis , Bacillus pumilus and Zhihengliuella halotolerans ), isolated from the rhizosphere of several halophyte plants, were deterimined and their effects on some vegetative traits and ionic content of wheat plant irrigated with saline water ( 0.2, as control, 4, 8 and 16 dS/m) were measured. Result showed that all three bacteria were able to produce auxin, hydrogen cyanide, siderophore, 1-aminocyclopropane-1-carboxylic acid deaminase and soluble phosphate. The increase in salinity levels caused increase in the concentration of sodium and decrease in the concentration of potassium, calcium and phosphorus in wheat leaves, as well as decrease in stem length, shoot and root dry weight, root to shoot dry weight ratio and total biomass. In wheat plants irrigated with saline water and inoculated with the bacterial strains, sodium concentration decreased up to 17.7% and concentrations of potassium, calcium, phosphorus and potassium to sodium ratio increased up to 33, 25.7, 200.4 and 41%, respectively. The most efficient bacterium was found to be Z. halotolerans . All bacterial isolates also increased stem length, shoot and root dry weight, root to shoot dry weight ratio and total biomass by 17, 58.6, 137, 88 and 66 %, respectively. The results of this study showed that the plant growth-promoting bacteria of rangeland halophytic plants potentionally improve the growth indices of wheat plants in saline conditions. These results also showed that the rhizosphere of halophytic plants in rangelands can be a good source for the isolation of salinity-resistant bacteria to improve the resistance of wheat plants to salinity.

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几种盐生植物根际细菌促生潜力对小麦营养生长和离子含量的影响

盐碱胁迫是世界小麦生产面临的重要挑战。从盐生植物中分离得到的促进植物生长的根际细菌可以通过直接和间接的机制提高作物对盐度的耐受性。本研究测定了从几种盐生植物根际分离得到的菌株（安全芽孢杆菌、短小芽孢杆菌和耐盐志恒流菌）的植物生长促进特性，并测定了它们对盐水灌溉小麦（0.2作为对照，4、8和16dS/m）的一些营养特性和离子含量的影响。结果表明，三种细菌均能产生生长素、氰化氢、铁载体、1-氨基环丙烷-1-羧酸脱氨酶和可溶性磷酸盐。盐度水平的增加导致小麦叶片中钠浓度增加，钾、钙和磷浓度降低，茎长、茎干重、根干重比和总生物量下降。在盐水灌溉和接种菌株的小麦植株中，钠浓度下降了17.7%，钾、钙、磷和钾钠比分别提高了33%、25.7%、200.4和41%。发现最有效的细菌是耐盐Z。所有菌株的茎长、地上部和根部干重、根冠干重比和总生物量分别增加了17%、58.6%、137、88和66%。研究结果表明，在盐碱条件下，牧场盐生植物的生长促进菌对小麦植株的生长指数有潜在的改善作用。这些结果还表明，牧场盐生植物的根际可以作为分离耐盐细菌的良好来源，以提高小麦植物的耐盐性。

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yfthhy nwyn dr `lwm zysty

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12 weeks