Volume 10, Issue 19 (5-2022)                   ifej 2022, 10(19): 67-77 | Back to browse issues page

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Khosravi M, Heydari M, Alikhani H A, Mosleh Arani A. The Effect of Inoculation Brant's Oak )Quercus brantii L.) Seed with Plant Growth-Promoting Bacteria on Some Physiological Traits of Seedling under Different Levels of Water-Deficit Stress. ifej 2022; 10 (19) :67-77
URL: http://ifej.sanru.ac.ir/article-1-424-en.html
Ilam University
Abstract:   (1610 Views)
Extended Abstract
Introduction and Objective: The use of biofertilizers such as plant growth-promoting bacteria to reduce damage caused by water-deficit stress in plants and improve physiological factors and thus increase plant growth in arid and semi-arid regions is an essential management to control water-deficit stress. Therefore, this study was conducted to investigate the simultaneous effect of different levels of water-deficit stress and inoculation of plant growth-promoting bacteria on some physiological traits of Brant's Oak )Quercus brantii L.) seedlings.
Material and Methods: In order to investigate the effect of plant growth-promoting bacteria and different levels of irrigation on some physiological traits of oak) Quercus brantii L.) seedlings, an experiment was conducted in a complete randomized design with five replications in the research greenhouse of Yazd University. The main factor was three irrigation levels (80 % of full irrigation as control, 60 and 40 % of full irrigation) and the sub-factor was six levels of plant growth promoting bacteria (no inoculation as control and seed inoculation with Bacillus anthracis, B. licheniformis, Stenotrophomonas maltophilia, B. cereus and BMix (combination of 4 strains().
Results: The results of analysis of variance showed a significant effect of water deficit stress levels, bacterial treatments and their interaction on all studied traits. The results of comparison of means showed that the amount of chlorophyll a, b and total chlorophyll decreases with increasing levels of water-deficit. In contrast, the amount of proline, total phenol and percentage of free radical scavenging in oak seedlings under stress increased significantly compared to the control sample. The accumulation of malondialdehyde (MDA) that shows the rate of degradation and peroxidation of membrane lipids were significantly increased by water-deficit treatments, while application of PGPRs caused reduction in malondialdehyde content. These results showed that PGPRs can reduce negative effects on lipids peroxidation and thus increases the resistance of seedlings to water-deficit stress conditions.
Conclusion: In general, among the bacterial treatments, (BMix) bacterial treatment increased chlorophyll a and b, total chlorophyll and decreased malondialdehyde and Bacillus anthracis bacterial treatment increased proline, total phenol and percentage of free radical scavenging under water-deficit severe stress.

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Type of Study: Research | Subject: اکولوژی جنگل
Received: 2021/03/3 | Accepted: 2021/07/10 | Published: 2022/06/13

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