Mehdi Razmkhah; Ali Moradi; Hojatollah Latifmanesh; Hamidreza Balouchi
Abstract
Camelina (Camelina sativa) is a one-year oil plant, one of the most important problems of its cultivation is the interaction of seed germination and seed establishment with drought stress. Use of herbal treatments such as rye plant extract can speed up them, especially in drought-stress conditions. Therefore, ...
Read More
Camelina (Camelina sativa) is a one-year oil plant, one of the most important problems of its cultivation is the interaction of seed germination and seed establishment with drought stress. Use of herbal treatments such as rye plant extract can speed up them, especially in drought-stress conditions. Therefore, this research was conducted to investigate the effect of priming and priming time on germination and some biochemical traits of Camelina under drought stress in the Agriculture and Genetics Laboratory of Yasouj University from 2021 to 2022. The experiment was conducted as a factorial in a completely randomized design with 4 replications. The first factor was priming with Danko variety of rye plant root extract at 3 levels (zero, 40 and 60%), The second factor was priming times at three levels (zero, 6 and 12 hours) and the third factor included drought stress at three levels (zero, -3 and -6 times). Based on the obtained results, it was observed that drought stress affected the biochemical indicators and germination of Camelina and pre-treatment with rye extract at a concentration of 60% along with prime in 12 hours with the improvement of some biochemical indicators and germination were able to increase the tolerance of Camelina seedlings under drought stress by affecting the non-enzymatic antioxidant defense system of the plant. The results of the experiment show that using Danko variety of rye root extract with a concentration of 60% in 12 hours improves physical characteristics of the seed, helping germination in optimal and drought stress conditions.
Roya Behboud
Abstract
In spite of optimal qualitative traits of sweet corn plant, its cultivation is limited due to some problems in germination, poor vigor, seed wrinkling and seedling weak establishment in the soil, using mineral compounds in seed coating could improve germination and seedling growth indices, and physical ...
Read More
In spite of optimal qualitative traits of sweet corn plant, its cultivation is limited due to some problems in germination, poor vigor, seed wrinkling and seedling weak establishment in the soil, using mineral compounds in seed coating could improve germination and seedling growth indices, and physical characteristics of sweet corn seeds. In order to improve efficacy of sweet corn seed using seed coating, this experiment was conducted based on three-factor factorial in a completely randomized design with four replications of 25 seeds at the laboratory at the Department of Agronomy and Plant Breeding, Yasouj University, Iran, in 2018. The first factor included the concentrations of chitosan solutions (zero- 0.3% acetic acid, 0.5 and 0.75%), the second factor was gum arabic (zero- distilled water and 0.4%) and the third factor was V10K2.5P5 coating composition (10, 2.5 and 5 fold to seed weight respectively in Vermiculite (V), kaolin (K) and perlite (P)) and no coating treatment. The interaction effect showed that that the highest seedling length vigor index (183.24) was related to the coating treatment of gum arabic 0.4% and coating composition of V10K2.5P5 that had a significant difference with a treatment that had the lowest seedling length vigor index (85.70) from the coating treatment gum arabic 0.4% and no coating composition. The overall results showed that the coating treatment of chitosan 0.5% + coating composition of V10K2.5P5 + gum arabic 0.4% was more effective treatment on germination indices and seedling and physical characteristics of sweet corn seeds compared to other treatments.
Abstract
In order to investigate the effect of seed bio-inoculation on some germination indices of Cumin under drought stress a two factors experiment was laid out. Experimental factors included priming in nine levels (bio- inoculation with 4 strains of PF1, PF2, PF75 and CHA0 of Pseudomonas fluorescent, and ...
Read More
In order to investigate the effect of seed bio-inoculation on some germination indices of Cumin under drought stress a two factors experiment was laid out. Experimental factors included priming in nine levels (bio- inoculation with 4 strains of PF1, PF2, PF75 and CHA0 of Pseudomonas fluorescent, and 4 strains T29, T36, T39 and T40 of Trichoderma harzianum and non-primed (control)) and three levels of drought stress (0, -3 and -6 bar imposed by PEG 6000). Results showed that by increasing the osmotic potential levels germination indices decreased. At all levels of stress, inoculated seeds had higher germination percentage and root length than non-inoculated seeds. In under stress level of -3 bar, highest germination percentage (86.66%) and seedling weight vigor index (11.93) was obtained from T36 strain that; this treatment was able increase germination by more than 35% than non-inoculated seed. Under -6 bar, the highest (76.68%) and lowest (55%) germination percentage was related to T29 that has no significant difference with T36 (75.83%) and T39 (75.83%) and the lowest amount was related to non-primed treatment (55%). Also at all stress level, the highest length seedling vigor index was related to CHA0 strain. The highest weight seedling vigor index was related to T36 strain (6.4, 5.49 and 4.7 respectively in 0, -3 and -6 abr) and the lowest (4.89) was related to non-inoculated (control) seeds. According to the results, T36 can be suggested as a suitable pretreatment in moderation of the negative effects of osmotic potential on germination of cumin seeds.
Masume Hoseini Moghaddam; Amin Salehi; rasoul rezaei
Abstract
One of the most important research fields in medicinal plants is the effect of environmental stresses on quantitative and qualitative yield of these plants and finding solutions for improving tolerance to these stresses. In order to study the influence of seed biopriming with Pseudomonas fluorescent ...
Read More
One of the most important research fields in medicinal plants is the effect of environmental stresses on quantitative and qualitative yield of these plants and finding solutions for improving tolerance to these stresses. In order to study the influence of seed biopriming with Pseudomonas fluorescent and Trichoderma harzianum fungi on some germination and seedling indices of fennel (Foeniculum vulgare L.) under drought stress an experiment was conducted as factorial based on a completely randomized design with four replications. Experimental factors included bio-inoculation in nine levels (inoculation with four strains of PF2, PF16, PF56 and CHA0 of Pseudomonas fluorescent, and T13, T36, T39 and T43 strains of T. harzianum and non-primed (control)) and three levels of drought stress (0, -3 and -6 bar imposed by PEG6000). Seed germination and seedling characteristics were evaluated. Results showed that by increasing the osmotic potential levels, germination indices were decreased. In 0 bar, the highest germination percentage, root length and seedling length vigor index were obtained from CHA0 treated seeds and in three levels of stress, the highest germination rate, shoot length, dry weight seedling and seedling weight vigor index related to seed treatments by T39. Compared to non-inoculated seeds, CHA0 increased the root growth by 46, 51 and 51%, respectively, at osmotic potential levels of 0, -3, and -6 bar, respectively. According to the obtained results, it can be concluded using fungus and bacterial treatments can be causing to increasing of germination and seedling characteristic of fennel seeds in optimum and stress condition.
