Ali najm; Mehdi Aran; Abdolrahman Rahimian Boogar Rahimian Boogar
Abstract
This experiment was conducted to investigate the germination and seedling growth of two papaya (Carica papaya L.) varieties in response to the inoculation of mycorrhizal fungi and culture substrates in a factorial in the form of a completely randomized design. The experiment factors include varieties ...
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This experiment was conducted to investigate the germination and seedling growth of two papaya (Carica papaya L.) varieties in response to the inoculation of mycorrhizal fungi and culture substrates in a factorial in the form of a completely randomized design. The experiment factors include varieties at 2 levels (Red Lady (V1) and Bangladeshi (V2)), culture substrate at 5 levels (compost + perlite + vermicompost (1:1:1) (S1), compost + perlite + cocopeat (1:1:1) (S2), compost + vermicompost + cocopeat (1:1:1) (S3), perlite + vermicompost + cocopeat (1:1:1) (S4) and compost + perlite + vermicompost + cocopeat (1:1:1:1) (S5)), and mycorrhizal at 2 levels (no inoculation as control (M0) and inoculation (M1)). The results indicated a significant effect of culture substrate and mycorrhizal on germination and growth characteristics of papaya varieties. In the mycorrhizal inoculation treatment, the highest germination percentage (77.33%) and germination speed index (0.63) were observed in the Bangladeshi variety and the lowest average germination time for both varieties . The highest seedling height and root length were recorded for V1S4M1 and V2S5M1 treatments, and the highest shoot dry weight (0.276 g) was recorded for V2S5M1 treatment. According to the obtained results, inoculation of seeds in both Red Lady and Bangladeshi papaya varieties with mycorrhizal fungi and substrates containing organic matter, especially vermicompost, improved the germination and growth characteristics of the seedlings. Therefore, according to the advantages and compatibility of mycorrhizal fungi, it can be used as a suitable treatment to improve the germination and growth of papaya seedlings.
Ahmad Afkari
Abstract
In order to investigate the effects of seed inoculation with arbuscular mycorrhizal fungi on some chemical characteristics and seed germination of corn (Zea mays L.) under drought stress conditoins, a factorial experiment based on randomized complete design with three replications was conducted at the ...
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In order to investigate the effects of seed inoculation with arbuscular mycorrhizal fungi on some chemical characteristics and seed germination of corn (Zea mays L.) under drought stress conditoins, a factorial experiment based on randomized complete design with three replications was conducted at the physiology laboratory of Islamic Azad University Branch Ardabili, during 2015. Studied factors were: drought stress in four levels (Zero, -4, -8 and -12 bar) and seed inoculation with mycorrhizal fungus in four levels (no inoculation, seed inoculation with Funneliformis mosseae, Rhizoglomus fasciculatum and Claroideoglomu etanicatum. The results showed that the effect of drought stress and seeds inoculation with mycorrhizal fungi on germination components, seed protein content and antioxidant enzymes was significant at 1% probability Level. Seed inoculation with Rhizoglomus fasciculatum showed higher antioxidant enzymes activity and higher seed protein content compared with inoculation with Funneliformis mosseae, Claroideoglomus etanicatum and no inoculation. In drought stress conditions, plants will reduce oxidative stress leads to increased activity of antioxidant enzymes has been. The results of the mean comparison of data showed that with increasing drought stress germigation percen and germination rate index decreased and the means of germination time, increased. With respect to the results of this study, it seems that mycorrhiza fangi by an improvement in water and nutrient absorption, improve plant growth in drought stress condition. Thus, in order to increasing of germination components and chemical characteristics, it can be suggested that seeds inoculation of corn was applied with Rhizoglomus fasciculatum
