Journal of Agricultural Science and Technology
Journal of Agricultural Science and Technology
JAST
Agriculture
http://jast.modares.ac.ir
1
admin
1680-7073
2345-3737
10.22034/jast
en
jalali
1395
6
1
gregorian
2016
9
1
18
5
online
1
fulltext
en
Some Responses of Inoculated Persian Clover with Rhizobium to SO2 Pollution
Sulfur dioxide (SO<sub>2</sub>) is one of the most common and harmful air pollutants. High concentrations of SO<sub>2</sub> can cause stress and limit growth in plants. Some of the plants can resist stress by bacterial symbiosis such as <em>Rhizobium </em>symbiosis. <em>Rhizobium</em> is a beneficial bacterium that enhances plant growth and yield. To study the effects of SO<sub>2</sub> pollution on growth indexes, protein, proline and sulfur contents, 31 days old plants of <em>Trifolium resupinatum </em>(Persian clover), inoculated with native and standard <em>Rhizobium </em>were exposed to the different concentrations of SO<sub>2</sub> (0 as control, 0.5, 1, 1.5 and 2 ppm) for 5 consecutive days. Results showed that inoculation increased leaf area, leaf number, shoot height, root length, shoot fresh and dry weight and protein content of Persian clover but didn’t show any significant effect on proline and sulfur contents. Different concentrations of SO<sub>2</sub> had a significant effect on leaf number, shoot height, root length, shoot fresh and dry weight, protein, proline and sulfur contents but didn’t have effects on leaf area. 0.5 ppm concentration of SO<sub>2</sub> increased growth indexes and protein content. Proline and sulfur contents didn’t change in 0.5 ppm. Increasing SO<sub>2</sub> decreased growth indexes and protein, and increased proline and sulfur contents. Interaction between <em>Rhizobium</em> inoculation and SO<sub>2</sub> treatment improved the stress effects of high concentrations of SO<sub>2</sub> on growth indexes, protein, proline and sulfur contents. It was therefore concluded that <em>Rhizobium</em> can increase tolerance and resistance of this plant to the abiotic stresses such as SO<sub>2 </sub>pollution<sub>. </sub>
Air pollution,Persian clover,Protein,Rhizobium,Sulfur
1319
1331
http://jast.modares.ac.ir/browse.php?a_code=A-23-1000-4658&slc_lang=en&sid=23
M.
Askari
M.
Askari
100319475328460063067
100319475328460063067
Yes
Department of Biology, Faculty of Science, Arak University, Arak 38156-8-8349, Islamic Republic of Iran.
Department of Biology, Faculty of Science, Arak University, Arak 38156-8-8349, Islamic Republic of Iran.
L.
Bayat
L.
Bayat
100319475328460063016
100319475328460063016
No
Department of Biology, Faculty of Science, Arak University, Arak, Islamic Republic of Iran.
Department of Biology, Faculty of Science, Arak University, Arak, Islamic Republic of Iran.
F.
Amini
F.
Amini
100319475328460063051
100319475328460063051
No
Department of Biology, Faculty of Science, Arak University, Arak 38156-8-8349, Islamic Republic of Iran.
Department of Biology, Faculty of Science, Arak University, Arak 38156-8-8349, Islamic Republic of Iran.