PHYSIOLOGICAL EFFECT OF SOME BIOREGULATORS ON WHEAT PLANTS GROWN UNDER SALT STRESS | ||||
| Journal of Plant Production | ||||
| Article 8, Volume 33, Issue 6, June 2008, Page 4171-4183 PDF (519.13 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2008.166723 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| I. Z. El-Shamey* | ||||
| Department of Agricultural Botany, Faculty of Agriculture, Ain Shams University, Cairo, Egypt | ||||
| Abstract | ||||
| Wheat plants (Triticm aestirvum L.cv. Sakha 8) were treated with some bioregulators (proline 10& 20ppm) , Salicylic acid (50 & 100 ppm) and paclobutrazol (25ppm) ) with three salinity levels (0, 1000and 6000 ppm NaCl). The results showed that, without bioregulators application, increasing NaCl levels increased root / shoot ratio to be 5 fold at 6000 ppm higher than control treatment. Adding the bioregulators obviously decreased the root/ shoot ratio under salt stress. Similar trend was detected for the grains yield (g) plant-1 at harvest stage. Whereas, the highest level of salinity caused a decrease of grain yield (g) plant-1 around 14 times lower than that obtained from control treatment. Meanwhile the bioregulator treatments reduces the harmful effect of salinity on grain yield (g) plant-1. Paclobutrazol gave the best positive effect under the highest salinity level but proline at 20 ppm concentration gave the lowest positive effect on the grain yield (g) plant-1 under the highest salinity level. Some physiological parameters such as total chlorophyll, total soluble sugars , free amino acids , indoles , phenols , proline, K and Na contents in leaves were tested as a physiological markers of wheat plants grown under salt stress. The results showed that, the K/Na ratio and indole content in leaves could be used as physiological markers for wheat plants grown under salt stress. | ||||
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