Zeinab Javanmard; Masoud Tabari; Fatemeh Ahmadloo
Abstract
In this investigation effect of hormonal preparation on seed germination and early growth of Pinus eldarica Medw. under salinity stress was examined. The seeds were treated with salicylic acid (0 (control), 0/5, 1 and 2 mM, 72 hours) and following the imbibing to NaCl (0, 40, 120, 200 and 280 mM) placed ...
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In this investigation effect of hormonal preparation on seed germination and early growth of Pinus eldarica Medw. under salinity stress was examined. The seeds were treated with salicylic acid (0 (control), 0/5, 1 and 2 mM, 72 hours) and following the imbibing to NaCl (0, 40, 120, 200 and 280 mM) placed in germinator (20°C) for 40 days. Germination in non-treated seeds was ceased in osmotic potentials >120 mM but it continued to 280 mM osmotic potential in treated seeds. In most salinity levels the greatest seed germination and germination energy, and in all salinity levels, the maximum of germination speed and vigor index allocated to 1 mM salicylic acid. These findings imply that for plantation of P. eldarica on saline soils it is better that the seeds before sowing in nurseries, with salicylic acid, particularly with 1 mM solution are treated
Masoud Tabri; Ehsan Sadati
Abstract
The aim of this study is investigation of survival, vegetative characteristics and biomass allocation in seedlings of common ash (Fraxinus excelsior L.) grown in different water regimes. For this purpose, seedlings of ash were examined in a completely randomized design for 120 days in an open area of ...
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The aim of this study is investigation of survival, vegetative characteristics and biomass allocation in seedlings of common ash (Fraxinus excelsior L.) grown in different water regimes. For this purpose, seedlings of ash were examined in a completely randomized design for 120 days in an open area of bottomland forest at two levels of soil moisture regimes (permanent flooding, periodic flooding with a rotation period of 15 days) and control level. At the end of the experiment, flooding decreased survival, vegetative characteristics, biomass allocation and vitality of ash seedlings. This reduction in permanent flooding was more than at the periodic flooding. In contrast, diameter growth response in periodic flooding was greater than permanent flooding and control level. The reason of this phenomenon can be attributed to the development of woody xylem cells. In periodic flooding, compared to permanent flooding, because of greater production of adventitious root and soil drainage, access of oxygen required for metabolism was easier and Photosynthetic organs of the plant (leaf area) and leaf biomass prominently increased. Overall, the results showed that F. excelsior was tolerant to flooding and can be used for restoration of bottomland forest, riparian area, lagoons and plains exposure to periodic flooding
Ghasem ali Parad; Seyed Ehsan Sadati
Abstract
The aim of this study is
investigation of survival, vegetative characteristics and biomass allocation in
seedlings of common ash (Fraxinus excelsior L.) grown in different water
regimes. For this purpose, seedlings of ash were examined in a completely randomized design for 120
days in an open ...
Read More
The aim of this study is
investigation of survival, vegetative characteristics and biomass allocation in
seedlings of common ash (Fraxinus excelsior L.) grown in different water
regimes. For this purpose, seedlings of ash were examined in a completely randomized design for 120
days in an open area of bottomland forest at two levels of soil moisture
regimes (permanent flooding, periodic flooding with a rotation period of 15
days) and control level. At the end of the experiment, flooding decreased
survival, vegetative characteristics, biomass allocation and vitality of ash
seedlings. This reduction in permanent
flooding was more than at the periodic flooding. In contrast, diameter growth
response in periodic flooding was greater than permanent flooding and control
level. The reason of this phenomenon can be attributed to the development of
woody xylem cells. In periodic flooding, compared to
permanent flooding, because of greater production of adventitious root and soil
drainage, access of oxygen required for metabolism was easier and
Photosynthetic organs of the plant (leaf area) and leaf biomass prominently
increased. Overall,
the results showed that F. excelsior was tolerant to flooding and can be used
for restoration of bottomland forest, riparian area, lagoons and plains
exposure to periodic flooding
