Siavash Heshmati; Gholam Akbari; Majid Amini Dehaghi; Kayvan Fathi Amirkhiz; Keyvan Maleki
Articles in Press, Accepted Manuscript, Available Online from 28 March 2021
Abstract
In order to study the foliar application of melatonin on plants grown from safflower in different seed quality under drought condition, two field experiments were carried out at research farm of Aburaihan Campus, University of Tehran in 2017 and 2018 growing seasons. The experimental design was split-factorial ...
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In order to study the foliar application of melatonin on plants grown from safflower in different seed quality under drought condition, two field experiments were carried out at research farm of Aburaihan Campus, University of Tehran in 2017 and 2018 growing seasons. The experimental design was split-factorial in a randomized complete block design with four replicates. The treatments consisted of two levels of drought stress (1- normal irrigation (no-stress) and 2- irrigation after reaching 85% of soil moisture depletion of field capacity at flowering stage (drought stress)) were randomized to the main plots. Subplots were 4 treatments in number and consisted of a factorial combination of seed quality (stored seed and recently harvested seeds) and foliar application (1-control and, 2- melatonin foliar application). The results illustrated that the SOD and CAT activity were increased in response to melatonin in plants grown from recently harvested seeds under drought condition. Furthermore, it indicated that foliar application of melatonin decreased the amount of leaf soluble proteins by 28 % in plants grown from recently harvested seeds under drought condition. The results showed that the amount of malondialdehyde decreased by 37% in plants grown from recently harvested seeds by foliar application of melatonin under drought condition. It seems that the seed quality has a great influence on grown plants and, also using melatonin may play a substantial role in ameliorating the injuries derived from stress on safflower plant.
peyman sharifi; Fatemeh Benakashani; Iraj Allah dadi; Gholam Akbari
Articles in Press, Accepted Manuscript, Available Online from 10 June 2021
Abstract
To evaluate the effect of living mulches on weed control and yield of Black cumin (Nigella sativa L.) weeds by living mulch, a factorial split experiment was conducted in the form of a randomized complete block design with four replications in the research farm of Aburaihan Campus, the University of ...
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To evaluate the effect of living mulches on weed control and yield of Black cumin (Nigella sativa L.) weeds by living mulch, a factorial split experiment was conducted in the form of a randomized complete block design with four replications in the research farm of Aburaihan Campus, the University of Tehran in the 2017-2018 crop year. Factors of seedbed planting (stale seedbed and simple), type of living mulch (berseem clover (Trifolium alexandrinum L.), fenugreek (Trigonella foenum-graecum L.) and alfalfa (Medicago sativa L.), planting time of living mulch (two weeks before and at the same time of black seed cultivation). The first factor was in the main plots and the combination of the second and third factors was in the subplots. The results showed that fenugreek and alfalfa were more successful in terms of weed control than clover with a 40% reduction in weed density and biomass compared to the control without live mulch and without weeding. Also, in order to achieve the highest percentage of black cumin yield traits (83.02, 93.44 and 50.50), the number of capsules per plant, number of seeds per capsule and 1000-seed weight, respectively, compared to the control without living mulch and complete weeding, respectively. It is recommended to cultivate fenugreek at the same time as black cumin. In the case of alfalfa, pre-sowing is also recommended. Stale seedbed planting system did not play a positive and significant role in weed control and increase in black seed yield traits.
Maryam Rahimi Jahangirlou; Gholam Akbari; Iraj Allah dadi; Saeid Soufizadeh; Maryam Rahimi Jahangirlou
Volume 23, Issue 2 , Spring 2021, , Pages 261-276
Abstract
Studies to assess quality of dent maize grain are noteworthy because of its wide use as food, feed and ethanol production. This study aimed to evaluate the concentration and composition of starch and oil in maize grain in response to different cultivars (KSC704 and KSC260), planting dates (20 June and ...
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Studies to assess quality of dent maize grain are noteworthy because of its wide use as food, feed and ethanol production. This study aimed to evaluate the concentration and composition of starch and oil in maize grain in response to different cultivars (KSC704 and KSC260), planting dates (20 June and 21 July), irrigation (12-day and 6-day intervals) and nitrogen (0 and 184 kg N ha-1) rate as the strip-plot factorial statistical model during the 2018 growing season in Pakdasht county of Iran. The results suggested that nitrogen application increased grain yield by one tonnes ha-1. In addition, KSC260 had higher grain yield than KSC704 by 0.96 tonnes ha-1. All compositional variables except stearic acid were affected by the interaction effect of irrigation and nitrogen rate. In low irrigated treatments, nitrogen application reduced the amount of oil, palmitic acid, oleic acid, linoleic acid and linolenic acid. In low irrigated condition, nitrogen application had no effect on increasing the concentration of starch and amylopectin. The use of nitrogen fertilizer reduced the amount of stearic acid by 0.05 g kg-1. In conclusion, the balance between irrigation and nitrogen utilization seems to be important for improving the oil and starch properties of maize grain.
Sahar Binesh; Gholam abbas Akbari; Elias Soltani; Fatmeh Amini
Volume 20, Issue 2 , Summer 2018, , Pages 427-438
Abstract
In order to examine the germination response of basil medicinal plant’s seeds (Ocimum basilicum L.) to temperature and determination of cardinal temperatures for germination percentage and rate, a compound decomposition experiment was performed through a fully random design with four reptile and ...
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In order to examine the germination response of basil medicinal plant’s seeds (Ocimum basilicum L.) to temperature and determination of cardinal temperatures for germination percentage and rate, a compound decomposition experiment was performed through a fully random design with four reptile and six thermal levels (8, 15, 20, 25, 30, and 35 degree centigrade) in seed technology laboratory of Abou-Reyhan campus in Univerity of Tehran. In this study, 22 Basil masses were evaluated including “Tehran”, Green Shahr-e-Rey”, “Green Birjand”, “Purple Birjand”, “Green Shiraz”, “Green Zabol”, “Zahedan”, “Green Zahedan”, “Kermanshah”, “Green Pishva”, “Purple Pishva”, “Green Malayer”, “Khash”, “Local green Tonekabon”, “Green Isfahan II”, “Purple Isfahan II”, “Green Isfahan III”, “Green Isfahan IV”, “Green Mash’had”, “American green Napolta”, “Italian Genovese”, and “Switzerland” . Based on the results of variance analysis, temperature impact, genotype, and their interaction on germination percent and germination rate was significant at the 5% level. Optimal range of temperature for germination percent and germination rate was obtained as 19.10-27.78 and 20.32-29.89 degrees centigrade, respectively. In most masses, the highest germination rate was observed at 25 degrees centigrade. Among all evaluated masses in current research, Isfahan III was appropriated the highest germination rate in all temperatures. The results of experiment showed that the response of germination percentage and germination rate to temperature was well described through Beta function and segmented function, respectively, and cardinal temperatures can be determined for Basil using these two models.
Roqia Adeli; Elias Soltani; Gholam Abbas Akbari; Hossein Ramshini
Volume 19, Issue 4 , Winter 2018, , Pages 921-932
Abstract
Identification of cultivars with tolerance to water stress has important for crop production in arid and semi-arid areas. In order to, a factorial experiment was conducted based on completely randomized design with two factors of 20 genotypes of canola and 5 water potentials of 0, -0.15, -0.3, -0.5, ...
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Identification of cultivars with tolerance to water stress has important for crop production in arid and semi-arid areas. In order to, a factorial experiment was conducted based on completely randomized design with two factors of 20 genotypes of canola and 5 water potentials of 0, -0.15, -0.3, -0.5, and -0.8 MPa in 4 replications in Seed Technology Laboratory of College of Aburaihan, during 2015-16. Seed germination of different genotypes was recorded twice in a day for each water potential at 20oC. Thereafter, hydrotime model was fitted to time course germination. Results indicated that Karaj 1 and Opera had the lowest value of base water potential with -1.23 and -1.2 (MPa) and they were the most tolerant genotypes to drought. Genotypes of 203 and Likord had the highest value of base water potential with -0.27 and -0.22 and the most sensitive genotypes to water stress. The lowest hydrotime constant belonged to Zarfam and Talaye with 22.67 and 23.73 MPa-hours and the highest hydrotime constant belonged to 389 and Opera with 50.93 and 48.07 MPa-hours. The base water potential with 95% had the highest broad sense heritability. Using this information it is possible to identify genotypes with higher efficiency and more tolerate to water stress in future breeding programs to breed new genotypes with tolerance to water stress.
Maryam Mansori; Gholam Abbas Akbari; Seyad Mohammad Mahdi Mortazavian
Volume 19, Issue 2 , Autumn 2017, , Pages 461-473
Abstract
To evaluate the effect of foliar application of nano-particles of titanium dioxide on yield and yield components of ecotypes of cumin under drought stress conditions, a split-split plot experiment was carried out based on a randomized complete block design with three replications, during 2014-2015 at ...
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To evaluate the effect of foliar application of nano-particles of titanium dioxide on yield and yield components of ecotypes of cumin under drought stress conditions, a split-split plot experiment was carried out based on a randomized complete block design with three replications, during 2014-2015 at the research farm of Aburaihan Campus, University of Tehran at Pakdasht. Treatments were consisted of water stress at three levels (full irrigation throughout growing season, water stress at vegetative and reproductive stages), spraying of nano-particles of titanium dioxide at three levels (no spray, spraying with concentration of 0.015 and 0.03 percentages) and also ecotypes of cumin from nine regions. Based on the obtained results the highest grain yield was belonged to Ardakan-Yazd in normal irrigation and spraying of nano-particles at concentration of 0.03 percent with an average of 194.05 grams per square meter, compared to non-sprayed treatment in which 17 percent lower grain yield was obtained. The highest grain yield also was observed at stress conditions in reproductive phase for ecotype of Maneh of North Khorasan at spraying of 0.015 percent of nano-particles with an average of 45.89 grams per square meter, when compared to the control (no spray) in which 16 percent lower grain yield was obtained. Ecotypes also showed significant differences at level of one percentage in terms of responses to drought stress. Based on the obtained results from spraying of nano-particles at a concentration of 0.03 percent, the negative effects of drought stress were reduced and this treatment prevented from huge yield loss under stress.
Hamid Jabbari; Nayyer Azam Khosh kholgh Sima; Gholam Abbas Akbari; Iraj Allahdadi; Amir Hossein Shirani rad; Ali Hamed
Volume 18, Issue 1 , Winter 2016, , Pages 1-19
Abstract
In order to study of root system relationship with water relations in Rapeseed under drought stress conditions, a pot experiment was carried out in greenhouse at Agricultural Biotechnology Research Institute of Iran (Karaj) in 2012. Five winter Rapeseed genotypes were evaluated under four irrigation ...
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In order to study of root system relationship with water relations in Rapeseed under drought stress conditions, a pot experiment was carried out in greenhouse at Agricultural Biotechnology Research Institute of Iran (Karaj) in 2012. Five winter Rapeseed genotypes were evaluated under four irrigation treatments, using a factorial experiment based on randomized complete block design. The results indicated that response of genotypes to irrigation treatments was different for stomata conductivity, SPAD value, root length and diameter, morphologic characteristics, yield and yield components. In control, Cooper produced the highest grain yield that due to higher silique number per plant, whereas, ‘Opera’ had the maximum grain yield under drought stress treatments. This subject was due to higher root depth and diameter in ‘Opera’ and on the basis of these characters, the high leaf area duration, stomata conductivity, silique number and grain number was observed in ‘Opera’. In conclusion, these results showed that role of root morphologic characteristics in Rapeseed adaptation to drought tolerance is powerful and an effective root system with last stomata conductivity, more leaf area duration and high silique number were more important for yield maintenance of Rapeseed under drought stress conditions.
Masoumeh Naeemi; Gholam Ali Akbari; Amir Hosein Shirani Rad; Tahere Hasanloo; Gholam Abbas Akbari; Mahdieh Amirinejad
Volume 17, Issue 3 , Autumn 2015, , Pages 635-647
Abstract
In order to evaluate the effect of zeolite application and selenium spraying on some physiological traits and grain yield in medicinal pumpkin (Cucurbita pepo L.) under different moisture regimes, a study was conducted in a factorial experiment based on randomized complete block design with three replications ...
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In order to evaluate the effect of zeolite application and selenium spraying on some physiological traits and grain yield in medicinal pumpkin (Cucurbita pepo L.) under different moisture regimes, a study was conducted in a factorial experiment based on randomized complete block design with three replications during 2010 in Takestan at Gazvin province, Iran. The three levels of irrigation factors including normal irrigation based on 60mm evaporation from class A pan (control), withhold irrigation at the flowering and fruit formation stages, zeolite factors including two levels of non-application and use of 10 tons per hectare and selenium was sprayed at two concentration in zero and 30 grams per liter per hectare. The results showed that water deficit stress decreased stomatal conductivity, carotenoid content, chlorophyll a, total chlorophyll, grain yield and increased proline concentration and chlorophyll b content. Zeolite application of 10 tons per hectare under water deficit stress conditions had desirable effect on chlorophyll a and chlorophyll b content and grain yield, also improved traits as stomatal conductivity and reduced proline concentration. The highest grain yield (1329 kg.ha-1) was obtained with zeolite and selenium application together at normal irrigation conditions. According to the results, it seems that application of zeoilite and selenium in areas that are subjected to water deficit stress can be useful in improving plant growth and production.
leila Mottaghi; Iraj Allahdadi; Amir Hossein Shirani-rad; Gholam Abbas Akbari; Tahereh Hasanloo
Volume 16, Issue 2 , Winter 2014, , Pages 381-397
Abstract
This study was conducted to analyze the effect of zeolite application on yield and yield components of rapeseed under drought conditions as a factorial-split on the based of randomized complete block design with four replications in 2011-12 in the research field of Seed and Plant Improvement Institute, ...
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This study was conducted to analyze the effect of zeolite application on yield and yield components of rapeseed under drought conditions as a factorial-split on the based of randomized complete block design with four replications in 2011-12 in the research field of Seed and Plant Improvement Institute, Karaj. The effects of zeolite levels Z0 (0) and Z10 (10 t/ha) under three drought stress levels, control (irrigation after 40%), moderate stress (irrigation after 60%) and severe stress (irrigation after 80% soil water depletion) were in main plots and four genotypes of Brassica napus (‘KR4’, ‘Eldo’ lines and ‘GKH305’, ‘Anatol’ cultivars) were in subplots. Based on the results, negative impact of drought on yield components led to a significant fall in grain and oil yield. The most negative impact of drought stress was seen in the grain number per silique. Between genotypes, ‘GKH305’ in none stress condition and ‘Anatol’ in both mild and severe stress conditions had the highest yield. According to the results, zeolite can be used in growth period or part time of drought stress.
Masoomeh Naeemi; Gholam Ali Akbari; Amir Hossein Shirani Rad; Tahereh Hassanlou; Gholam Abbas Akbari
Volume 14, Issue 1 , Summer 2012, , Pages 67-81
Abstract
In order to evaluation the effect of zeolite application and selenium spraying on water relations traits and antioxidant enzymes in medicinal pumpkin (Cucurbita pepo L.) at water deficit stress conditions, an experiment was conducted in factorial based on randomized complete block design with three replications ...
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In order to evaluation the effect of zeolite application and selenium spraying on water relations traits and antioxidant enzymes in medicinal pumpkin (Cucurbita pepo L.) at water deficit stress conditions, an experiment was conducted in factorial based on randomized complete block design with three replications during 2010 in Takestan, Iran. The three levels of irrigation factor include normal irrigation (control), withhold irrigation at the flowering and fruit formation stages, zeolite factors include two levels of non application and use of 10 tons per hectare and selenium was sprayed at two concentration in zero and 30 grams per liter per hectare. Water deficit increased antioxidant enzymes activity, so that the increase in stressed plants at flowering stage was among the most prominent. Selenium spraying increased the anti-oxidative activity. Zeolite application of 10 tons per hectare, reduced stress effects and improved traits as RWC, WSD, soluble protein content, number of seeds, 100 seed weight and oil yield. According to the results, application of zeoilite under drought stress condition retain the moisture during stress and can be useful in improving plant growth and production.
Mehdi Zarrabi; Iraj Allah dadi; Gholam Abbas Akbari; Hamid Iran najad; Gholam Ali Akbari
Volume 12, Issue 2 , Autumn 2010, , Pages 37-50
Abstract
To study the seprate and combined effects of phosphorus fertilizer, Phosphate-solubilizing bacteria and mycorrhizal fungus on reducing drought stress damages of grain corn (SC704) during its vegetative stages under field conditions, an experiment was conducted as split plot based on RCBD with three replications ...
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To study the seprate and combined effects of phosphorus fertilizer, Phosphate-solubilizing bacteria and mycorrhizal fungus on reducing drought stress damages of grain corn (SC704) during its vegetative stages under field conditions, an experiment was conducted as split plot based on RCBD with three replications at College of Abouraihan, University of Tehran in 2009. Experimental factors were drought stress as main-plot (irrigation after 50 as control, 100 and 150 mm evaporation from pan class A) and fertilizer plus biofertilizer compounds as sub-plots. Drought stress began after seedling stage. Analysis of variance showed that drought stress significantly affected most of investigated traits such as number of row/ ear, number of kernel/ row, ear weight, 1000kernel weight and grain yield. All the measured traits in compounds phosphate-solubilizing bacteria, mycorrhiza fungies and triple super phosphate treatment were higher than other treatments under water deficit stress conditions. Frthermore, grain yield in triple super phosphate treat under severe water deficit stress conditions (1.81 ton/ha) were significantly less than normal irrigation (8.38 ton/ha) and low stress conditions (4.98 ton/ha). According to this experiment, seed inoculation with phosphate-solubilizing bacteria, mycorrhiza fungies and triple super phosphate compounds affected grain yield and harvest index significantly. This experiment showed that phosphate-solubilizing microorganisms can positively interact in promoting plant growth as well as in P uptake in maize plant, leading to improve plant tolerance under water deficit stress conditions.
Zinat Hajihashemi; Gholam Abbas Akbari; Amir Hossein Shirani rad; Reza Amiri; Shahryar Dashti
Volume 11, Issue 2 , Autumn 2009, , Pages 29-39
Abstract
In order to study the effect of drought stress in terminal growth period on agronomical and physiological characteristics of canola (Brassica napus L.) cultivars, a field experiment was conducted using split-plot layout based on randomized complete blocks design with four replications at experimental ...
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In order to study the effect of drought stress in terminal growth period on agronomical and physiological characteristics of canola (Brassica napus L.) cultivars, a field experiment was conducted using split-plot layout based on randomized complete blocks design with four replications at experimental field of Seed and Plant Improvement Institute, Karaj in 2006. There were two factors, including irrigation at two levels (irrigation after 80 mm evaporation from class “A” pan as control and drought stress from flowering stage until physiological maturity) as main plots. In addition, twelve spring cultivars: (RGS003, Sarigol, Hyola401, Hyola 60, Hyola 330, Kimberly, 19-H, PR-401/16, PP-308/8, ORS 3150-3006, RG 4403, and RGAS 0324) were applied in sub plots. Results showed that RG 4403 had maximum grain yield (3228 Kg/ha) and harvest index (29.9%). In drought stress conditions, best cultivar in grain yield, 1000-seeds weight and oil yield was 19-H and with comparison of stress tolerance indices had better compatibility to water stress. Sarigol and Hyola330 had the lowest yield and yield components and ORS3150-3006 was the most sensitive to water stress.