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Information Journal Paper

Title

Seed inoculation with cycocel, psedumonas and azospirillum on photosynthetic pigments, yield and grain-filling period of wheat under salinity stress

Pages

  82-97

Abstract

 Introduction: Soil salinity is one of the most serious factors limiting crop growth and production in arid and semiarid regions. The use of cycocel and bio-fertilizers, such as plant growth-promoting rhizobacteria (PGPR), play a very important role in improving yield under salinity stress. Shaharoona et al. (2006) reported that the use of PGPR may be proper in developing strategies to facilitate plant growth in saline soils. Broetto et al. (2007) reported that salt stress decreased the Chlorophyll content of maize, but inoculation with bio-fertilizers increased the chlorophyll pigments. Osman (2014) implied that treating plants with cycocel may increase the concentration of chlorophyll and carotenoids, accelerate the process of photophosphorylation, and stimulate the photosynthetic rate. Better understanding Wheat responses under salinity stress may help in programs in which the objective is to improve the grain yield under salinity levels. The aim of this study, therefore, is to investigate the effect of soil salinity and seed inoculation with cycocel, pseudomonas and Azospirillum on photosynthetic pigments, grain yield and the grain-filling period of Wheat. Material and methods: In order to investigate the effect of soil salinity and seed inoculation with cycocel, pseudomonas and Azospirillum on photosynthetic pigments, grain yield and the grain-filling period of Wheat, a factorial experiment using a randomized complete block design with three replications was conducted at a research greenhouse of the Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili in 2016. Treatments included four levels of salinity (no salinity as the control and 25, 50, and 75 mM) as NaCl and seed inoculation with cycocel, Pseudomonas and Azospirillum in six levels (no seed inoculation as a control, inoculation with cycocel 10-5 and 6-10 mM, pseudomonas, Azospirillum and both applications of pseudomonas and Azospirillum). Pseudomonas putida strain 186 and Azotobacter chroococcum strain 5 were isolated from the rhizospheres of Wheat at the Research Institute of Soil and Water, Tehran, Iran. For inoculation, seeds were coated with gum Arabic as an adhesive and rolled into the suspension of bacteria until uniformly coated. The strains and cell densities of microorganisms used as PGPR in this experiment were 108 colony forming units (CFU). Results and discussion: The results showed that the rate and grain-filling period, Chlorophyll content a, b, total chlorophyll and carotenoids were affected by salinity levels, seed inoculation with cycocel, pseudomonas and Azospirillum at the probability level of 1%. Salinity decreased yield, root weight, Chlorophyll content a, b, total chlorophyll, carotenoids, rate and grain-filling period. These traits increased with inoculation with cycocel, pseudomonas and Azospirillum. A means comparison showed that the highest rate (0. 00253 g/day) and grainfilling period (39. 226 days) were obtained in no salinity with seed inoculation with Azospirillum and Pseudomonas. The lowest rate (0. 01101 g/day) and grain-filling period (254. 67 days) were obtained in the highest salinity level and without seed inoculation. In the highest salinity level (75 mM), Chlorophyll content of a, b, total chlorophyll and carotenoids were decreased 23. 31, 33. 18, 22. 61 and 42. 62, in comparison with the non-salinity application. Seed inoculation with cycocel, Pseudomonas and Azospirillum increased Chlorophyll content of a, b, total chlorophyll and carotenoids under normal as well as salinity stress conditions. The highest grain yield was obtained in a non-application of salinity, both application of Pseudomonas and Azospirillum, and the lowest of them was obtained in a salinity of 75 mM and inoculation with cycocel, Pseudomonas and cycocel. Conclusion: To conclude, it seems that seed inoculation with biofertilizers and cycocel can be considered as a proper tool for increasing grain yield and the grain-filling period under salinity stress.

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    APA: Copy

    Khanzadeh, Parisa, SEYED SHARIFI, RAOUF, & Khalilzadeh, Razieh. (2018). Seed inoculation with cycocel, psedumonas and azospirillum on photosynthetic pigments, yield and grain-filling period of wheat under salinity stress. JOURNAL OF AGROECOLOGY (کشاورزی بوم شناختی), 8(2 ), 82-97. SID. https://sid.ir/paper/390829/en

    Vancouver: Copy

    Khanzadeh Parisa, SEYED SHARIFI RAOUF, Khalilzadeh Razieh. Seed inoculation with cycocel, psedumonas and azospirillum on photosynthetic pigments, yield and grain-filling period of wheat under salinity stress. JOURNAL OF AGROECOLOGY (کشاورزی بوم شناختی)[Internet]. 2018;8(2 ):82-97. Available from: https://sid.ir/paper/390829/en

    IEEE: Copy

    Parisa Khanzadeh, RAOUF SEYED SHARIFI, and Razieh Khalilzadeh, “Seed inoculation with cycocel, psedumonas and azospirillum on photosynthetic pigments, yield and grain-filling period of wheat under salinity stress,” JOURNAL OF AGROECOLOGY (کشاورزی بوم شناختی), vol. 8, no. 2 , pp. 82–97, 2018, [Online]. Available: https://sid.ir/paper/390829/en

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