| تعداد نشریات | 24 |
| تعداد شمارهها | 924 |
| تعداد مقالات | 8,295 |
| تعداد مشاهده مقاله | 16,556,282 |
| تعداد دریافت فایل اصل مقاله | 13,966,764 |
Effects of salt Stress on Root Anatomy and Hydraulic Conductivity of Barley Cultivars | ||
| Iran Agricultural Research | ||
| مقاله 10، دوره 34، شماره 1، تیر 2015، صفحه 71-79 اصل مقاله (580.13 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22099/iar.2015.3077 | ||
| نویسندگان | ||
| Ehsan Bijanzadeh1؛ Kobra Maghsoudi* 2 | ||
| 1Department of Agroecology, College of Agriculture and Natural Resources of Darab, Shiraz University, Shiraz, I. R. Iran | ||
| 2Department of Crop Production and Plant Breeding, College of Agriculture, Shiraz University, Shiraz, I. R. Iran | ||
| چکیده | ||
| A hydroponic experiment was carried out to compare root anatomy and hydraulic conductivity of four barley cultivars including Valfajr, Karoon, Afzal and Zarjo under salt stress conditions. The results showed that under salt stress, the minimum diameter of vessels was observed in the peripheral metaxylem of seminal roots of Valfajr cultivar and in adventitious roots; Karoon with 19±3 µm had maximum diameter of vessels. In all barely cultivars, salt stress affected the diameter of central and peripheral metaxylem vessels more negatively in comparison to the number of the vessels. The mature xylem vessels of the seminal roots of the Valfajr and Zarjo cultivars had the most lignified cell walls. When the plants were exposed to salt stress, the casparian bands could be detected more in the seminal roots as U-shape and not in the adventitious roots. The lowest lignification thickness of cell wall (0.78 µm) was observed in the central metaxylem vessels of adventitious roots of Afzal cultivar under salt stress. Also, Afzal cultivar with highest surface area and lowest thickness of lignified cell walls, had the highest seminal root hydraulic conductivity (5.84×10-9 m s-1 MPa-1), whereas hydraulic conductivity was decreased to 3.21 and 3.17×10-9 m s-1 MPa-1 in Valfajr and Zarjo cultivars, respectively. Overall, Afzal and Karoon cultivars were found to perform better in water uptake at the early stages of growth due to less lignified cell walls of xylem in seminal and adventitious roots under salt stress conditions. Further research on hydraulic conductivity could be recommended. | ||
| کلیدواژهها | ||
| Central metaxylem؛ Hydraulic conductivity؛ Lignified cell walls؛ Seminal roots | ||
| مراجع | ||
|
Azaizeh, H., Gunse, B., &Steudle, E. (1992). Effects of NaCl and CaCl2 on water transport across root cells of maize (Zea mays L.) seedlings. Plant Physiology, 99, 886–894.
Caird, M.A., Richards, J.H., & Donovan, L.A. (2007). Night time stomatal conductance and transpiration in C3 and C4 plants. Plant Physiology, 143, 4–10.
Cosgrove, D.J. (2000). Expansive growth of plant cell walls. Plant Physiology and Biochemistry, 38:109–24.
Emam, Y. (2011). Cereal crop production. 4th Edition. Shiraz University Press, Shiraz. 190 pp. (In Persian)
Emam, Y., & Bijanzadeh, E. (2012). Water uptake and hydraulic conductivity of seminal and adventitious roots of five wheat cultivars at early growth stage. Journal of Agriculture, Science and Technology, 14, 1605-1616. (In Persian)
Flowers, T.J. (2004). Improving crop salt tolerance. Journal of Experimental Botany, 55, 307–319.
Frennch, J., & Steudle, E. (1998). Axiasl and radial resistance to roots of maize (Zea mays L.). Plant Physiology, 91, 719-726.
Frensch, J. (1997). Primary response of root and leaf elongation to water deficits in the atmosphere and soil solution. Journal of Experimental Botany, 48, 985–999.
Fricke, W., McDonald, A.J.S., & Mattson Djos, L. (1997). Why do leaves and leaf cells of N-limited barley elongate at reduced rates? Planta, 202, 522-530.
Fricke, W., & Peters, W.S. 2002. The biophysics of leaf growth in salt-stressed barley. A study at the cell level. Plant Physiology, 129, 374–388.
Fricke, W., Akhiyarova, G. Wei, W., & Alexandersson, E. (2010). The Short term growth response to salt of developing barley leaf. Journal of Experimental Botany, 57, 1079-1095.
Fricke, W., Bijanzadeh, E., Emam, Y., & Knipfer, T. (2014). Root hydraulics in salt-stressed wheat. Functional Plant Biology, 41, 366-378.
Gallardo, M., Eastham, J., Gregory, P.J., & Turner, N.C. (1996). A comparison of plant hydraulic conductances in wheat and lupins. Journal of Experimental Botany, 47, 233-239.
Hachez, C., Moshelion, M., Zelazny, E., Cavez, D., & Chaumont, F. (2006). Localization and quantification of plasma membrane aquaporin expression in maize primary roots: A clue to understand their role as cellular plumbers. Plant Molecular Biology, 62, 305–323.
Hoseini, H., Abdollahi, S., & Hashemi, F. (2003). Effect of salt stress on agronomic and physiologic characteristics of barley cultivars. Plant and Soil, 31, 456-468.
Katsuhara, M., & Shibasaka, M. (2007). Barley root hydraulic conductivity and aquaporin expression in relation to salt tolerance. Soil Science and Plant Nutrition, 53, 466- 470.
Knipfer, T., & Fricke, W. (2010a). Root pressure and a solute reflection coefficient close to unity exclude a purely apoplastic pathway of radial water transport in barley (Hordeum vulgare L.). New Phytologist, 187, 159-170.
Knipfer, T., & Fricke, W. (2010b). Water uptake by seminal and adventitious roots in relation to whole-plant water flow in barley (Hordeum vulgare L.). Journal of Experimental Botany, 61, 1-17.
Knipfer, T., & Steudle E. (2008). Root hydraulic conductivity measured by pressure clamp is substantially affected by internal unstirred layers. Journal of Experimental Botany, 59, 2071–2084.
Kramer, P.J., & Boyer, M. (1995). Water relations of plants and soils. Academic Press, Orlando. 331 pp.
Martinez Ballesta, M.C., Aparicio, F., Pallás, V., Martínez, V., & Carvajal M. (2003). Influence of saline stress on root hydraulic conductance and PIP expression in Arabidopsis. Plant Physiology, 160, 689–697.
Maurel, C., Simonneau, T., & Sutka, M. (2010). The significance of roots as hydraulic rheostats. Journal of Experimental Botany, 61, 3191–3198.
Miller, D.M. (1987). Errors in the measurement of root pressure and exudation volume flow rate caused by damage during the transfer of unsupported roots between solutions. Plant Physiology, 85, 164–166. | ||
|
آمار تعداد مشاهده مقاله: 2,369 تعداد دریافت فایل اصل مقاله: 2,649 |
||