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1 - The physiological and biochemical responses of directly seeded and transplanted maize (Zea mays L.) supplied with plant growth-promoting rhizobacteria (PGPR) under water stress
Saeed Rezazadeh Mohammadnabi ilkaee Fayaz Aghayari Farzad Paknejad Mehdi Rezaee
10.30495/ijpp.2019.670787

The purpose of the present study was to investigate the effect of plant growth-promoting rhizobacteria(PGPR) on physiological and biochemical properties of maize (Zea mays L.) in different cultivation methods under water stress. The experiment was carried out as split-p More

The purpose of the present study was to investigate the effect of plant growth-promoting rhizobacteria(PGPR) on physiological and biochemical properties of maize (Zea mays L.) in different cultivation methods under water stress. The experiment was carried out as split-plot design including water stress (well-watered, mild stress, and severe stress) as main plot and also cultivation (transplanting and direct seeding) and PGPR application (uninoculated and inoculated with Pseudomonas putida) as subplots.Water stress decreased biological and kernel yield. In direct seeding and no Pseudomonas application, severe stress decreased the kernel yield by 37% compared to the well-watered condition. Water stress resulted in significant reduction of chlorophyll content. However, it was increased by Pseudomonas application. In transplanting plants, well-watered and Pseudomonas application increased the chl. a+b by 41% in comparison with severe stress and no Pseudomonas application. Catalase (CAT) and superoxide dismutase (SOD) activities were gradually raised by increasing the water stress. In transplanted plants inoculated with Pseudomonas, severe stress decreased relative water content (RWC) by 23% compared to well-watered plants. In transplanted plants inoculated with Pseudomonas, severe stress increased Malondialdehyde (MAD) by 46% compared to well-watered plants. Total phenolic content (TPC) and total flavonoid content (TFC) increased by mild water stress and decreased by severe water stress. In directly seeded plants inoculated with Pseudomonas, mild water stress increased TPC by 11% compared to well-watered condition. Compared to well-watered treatment, 54% increases were observed in TFC by mild stress in transplanted plants treated with Pseudomonas. Transplanting and Pseudomonas was concluded to alleviate the adverse effects of water stress on physiological and biochemical traits of maize. Manuscript profile
Open Access Article
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2 - Fatty Acid Composition of Canola Cultivars Affected by Different Sowing Dates
Taraneh Samarzadeh Vazhdehfar Farzad Paknejad Amir Hossein Shirani Rad Saeed Vazan &lrm;Mostafa&lrm; Oveisi&lrm;
10.30495/ijpp.2021.1884670.1182

20.1001.1.21558221.2021.11.5.4.9

To investigate the effect of sowing date on yield and qualitative traits of canola cultivars and cope &lrm;with late-season drought stress, an experiment was carried out for two planting years in Karaj (Iran). &lrm;Sowing dates in six levels including three fall and thr More

To investigate the effect of sowing date on yield and qualitative traits of canola cultivars and cope &lrm;with late-season drought stress, an experiment was carried out for two planting years in Karaj (Iran). &lrm;Sowing dates in six levels including three fall and three winter sowing dates were considered as the &lrm;main factor and five canola cultivars (RGS003, Dalgan, Zabol10, Hyola401 and Hyola4815) as the &lrm;sub-factors. The results showed that except for palmitic acid, the simple effect of sowing date on all &lrm;the studied traits was significant in winter. The simple effect of cultivar on all traits in fall was &lrm;significant and in winter, it was only significant on the seed yield and seed oil yield. The interaction &lrm;between sowing date and cultivar in fall is the reason of significant effect of seed oil yield, linoleic &lrm;acid, linolenic acid, erucic acid and glucosinolate and in winter, it is the reason for the significance of &lrm;seed yield, oil content, oil yield and erucic acid. Dalgan cultivar had the highest seed yield and oil &lrm;yield on sowing date of October 7, and had the highest levels of oleic, linoleic and palmitic fatty &lrm;acids. In addition, with low and standard erucic acid and glucosinolate, this cultivar is recommended &lrm;based on the results of this study.&lrm; Manuscript profile

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List of Articles Farzad Paknejad