Showing 3 results for Alaei
H.r. Roosta, M. Rashidi, H.r. Karimi, H. Alaei, M. Tadayyonnejhad,
Volume 4, Issue 2 (Journal of Science and Technology of Greenhouse Culture 2013)
Abstract
In order to determine the best nutrient solution and potato cultivar for minituber production in aeroponics and comparison with classic hydroponics, a factorial experiment with three factors of culture system (aeroponics and hydroponics), nutrient solution (Chang et al., APCoAB and commercial nutrient solution of Isfahan), and different potato cultivars (Marfona, Santana and Moren) was carried out. The results showed that fresh weight of shoot and roots, and potato plant height was significantly higher in aeroponics compared to classic hydroponics. The highest shoot and root fresh weight in aeroponics was observed in Moren cultivar, nourished with commercial nutrient solution of Isfahan. Plant height was the highest in Moren cultivar, APCoAB nutrient solution and aeroponic system. The lowest shoot and root fresh weight and plant height were observed in Marfona cultivar. Yield and number of minitubers per plant in aeroponics increased 58.08 and 277.2 percent compared to hydroponics, respectively. The highest yield and number of minitubers was obtained in aeroponics system, APCoAB nutrient solution and Marfona cultivar. Therefore, it was concluded that in minituber production, the aeroponics system is superior to classic hydroponics and the best potato cultivar for cultivation in this system is Marfona and the best nutrient solutions are APCoAB and Chang et al. solutions.
B. Damankeshan, M.h. Shamshiri, H. Alaei,
Volume 13, Issue 2 (Journal of Soil and Plant Interactions 2022)
Abstract
Association of the plant with microorganisms such as dark septate endophytic fungi reduces the harmful effects of environmental stresses such as salinity. In this experiment, the effect of dark septate endophytes isolated from date palm roots on increasing salinity resistance of tomato (Lycopersicon esculentum cv. Super cheif) was investigated. The experiment was performed as a factorial in a completely randomized design with two factors including the type of isolate at 13 levels [4-B, 8-B, 10-D, 11-C, 14-A, 15-D, 16-A, 19-F, 21-A, 22-C, 22-E, 39-D, control (PDA plug)], and salinity at 3 levels (zero, 50 and 100 mM sodium chloride) with 3 replications. Tomato plants were inoculated with fungal isolates separated from date palm roots under salinity. Based on ANOVA results, in symbiosis with fungal isolates of 4-B and 11-C, the negative effects of salinity (up to 100 mM and equivalent to 9.52 dS/m) on tomato biomass were reduced. At salinity of 100 mM, 4-B had the highest plant fresh weight and 11-C had the highest plant dry weight compared to other treatments and were 55.51 and 26.55% higher than the non-inoculated treatments, respectively. By increasing the salinity level up to 100 mM, isolates of 4-B, 8-D, 10-D and 11-C had high efficiency in decreasing sodium concentration, increasing potassium concentration and potassium to sodium ratio. Symbiosis with some fungi (10-D and 8-B) caused a significant increase in phosphorus concentration (19%) compared to non-inoculated plants. At different salinity levels, isolates of 11-C, 39-D and 10-D increased the leaf relative water content. Increase in salinity up to 50 mM (equivalent to 5.44 dS/m) was associated with increased endophytic dependency and isolates of 11-C and 4-B showed the highest increase (43%) compared to other isolates.
Mahdi Mokari, Amirhossein Ghaderi, Javad Alaei,
Volume 15, Issue 4 (Journal of Soil and Plant Interactions 2024)
Abstract
In order to determination of evapotranspiration and crop coefficient of camelina in different growth stages under normal (i.e. without water shortage and salinity) and abnormal conditions (i.e. under drought and salinity stress), a pot experiment as factorial (with three factors including salinity, irrigation water and growth stage) in a form of completely randomized design with three replications was conducted. Three irrigation treatments including 100 (W1), 75 (W2) and 50% (W3) water requirement and four salinity levels including 0.7(S1), 4 (S2), 8 (S3) and 12 dS m-1 (S4) were used in greenhouse with plastic cover. The results showed that cumulative evapotranspiration of camelina during growth stage (i.e. 61 days) was 245 mm in greenhouse. By increasing irrigation water salinity, camelina evapotranspiration decreased by 9.84, 26.57 and 47% in W0S1, W0S2 and W0S3 treatments, respectively. Under irrigation with fresh water and without salinity stress, crop coefficient was identified 0.45, 0.9, 1.35 and 0.5 for initial, development, middle and final growth stage, respectively. Camelina crop coefficient at the initial, development, middle and final growth stage of W2S3 treatment decreased by 44, 60, 64 and 54% respectively compared to W0S0 treatment. Due to the quantitative and qualitative reduction of underground water resources in the forbidden plain of Kashmir, it is suggested to modify the plant coefficient of Camelina in relation to irrigation water salinity and water scarcity.
