hamidreza zekavati; Mahmoud Shoor; Hamid Rouhani; seyyed fazel fazeli kakhki; Ebrahim Ganji Moghadam
Abstract
In order to investigate the effect of different levels of Trichoderma fungus on some morpho-physiological, flowering and biochemical traits of tuberose flower under drought stress conditions, an experiment was conducted in a factorial based on completely randomized design with three replications in Research ...
Read More
In order to investigate the effect of different levels of Trichoderma fungus on some morpho-physiological, flowering and biochemical traits of tuberose flower under drought stress conditions, an experiment was conducted in a factorial based on completely randomized design with three replications in Research Greenhouses of Ferdowsi University of Mashhad in 2016. Drought stress treatments included irrigation at 100, 50 and 25% of field capacity and fungal treatments included three levels of 20, 10 and 0% of fungus. The results showed that drought stress increased the amount of antioxidant, total chlorophyll and proline. In addition to drough stress, had a negative significant effect on fresh and dry weights of root and biomass, relative water content of leaves, floret diameter and number of open floret, but Trichoderma largely moderated these negative effects. The highest amounts of total chlorophyll (1.04 mg/g leaf fresh weight) and relative humidity of leaf water (85.2%) were obtained at 10% level of fungus, which did not show a significant difference from those at 20% level of fungus. In the rest of the traits, the highest levels were found at 20% level of fungus. Since the Trichoderma fungus, besides reducing the effects of drought stress, increases vegetative growth and increases the number of open florets (which is considered as an important factor in the marketability) of tuberose flower, use of it can be suggested as a biological factor in increasing the quality of tuberose flower in similar conditions.
Mahmoud Shoor; Yahya Selahvarzi; Sahar Bostani
Volume 12, Issue 2 , November 2010, , Pages 25-35
Abstract
To evaluate the effect of high Co2 concentration on three ornamental plants belong to Asteraceae family, all with different morphological characteristics, namely: Marigold (compound leaves), Floss flower (opposite leaves) and Blanket flower (rosette leaves), an experiment was conducted in 2007 at Ferdosi ...
Read More
To evaluate the effect of high Co2 concentration on three ornamental plants belong to Asteraceae family, all with different morphological characteristics, namely: Marigold (compound leaves), Floss flower (opposite leaves) and Blanket flower (rosette leaves), an experiment was conducted in 2007 at Ferdosi university - Iran. Four levels of Co2 (350 as control, 700, 1050 and 1400 µl/l), as well as three plant genotypes were used as factorial arrangement based on a complete randomized design with three replications. The results showed that all studied traits were affected by Co2, plant genotypes and their interactions. Increasing Co2 concentration to 700 µl/l led to higher stomata density, epidermal cell density, stomata length, and guard cell length in all three plant genotypes. The results also showed that marigold (compound leaves) had the maximum values for stomata density, epidermal cell density, as well as stomatal index. Maximum stomata length occurred in Floss flower (opposite leaves) and maximum length and width of guard cell were observed in Blanket flower (rosette leaves).