THE EFFECT OF SALTY STRESS IN THE PRIMARY GROWTH STAGE OF COTTON PLANT | ||
| Fayoum Journal of Agricultural Research and Development | ||
| Article 33, Volume 23, Issue 2, July 2009, Pages 71-86 PDF (407.43 K) | ||
| Document Type: Research articles. | ||
| DOI: 10.21608/fjard.2009.197103 | ||
| Author | ||
| Mahmoud, Abd El-Rhman Abdi | ||
| Agriculture Faculty, University of Al-Fourat | ||
| Abstract | ||
| This research aimed to study the differences of physiological reactions of the developing cotton seedlings grown in pots under salinity (NaCI or Na2S04) salt. The experiment showed that cotton seeds have the ability to absorb the water from the normal and salinie soils. During the stage of seeds welling, but with more attributed with significant their differences duration in the imbibition's media and specific ion effects of (NaCI, Na2S04), where the speed and the amount of water absorption had increased all over, with in creasing the time. This parameter was obvious with a great vitality in its first days with the control, meanwhile an opposite trend was noticed with the effect of (NaCI). On the other hand, Na2S04 showed a contradictory behavior of the two cases above, denoting a relatively high amount of the activity in accordance to the time. This obviously affected inflation of the seeds, with significant differences in the common germination and its percentage which reached (86.27 and 55 %) respectively. Whereas, the germination energy reduced to 1/3 and 2/3 less than the samples under the effect of applied salts whose ions showed a relatively passive reaction on the primary developing stage of the seedlings, and consequently the growth slowed down. Salinity has caused obvious changes appeared in the weakness of the growth parameters (height, of seedlings spreading and the wet and dry seedlings' mass, leafy & root assembly, and cotyledons leaves area) as related to the salty ions which limited the dwarfing degree of the seedlings and broke the farming area into sections. The seedlings, the green mass and the roots showed an obvious respones in reacting the salinity which revealed pronounced reductions of the dry mass as compared to the wet one as well as the stem growth than that of the roots. That was considered the main reason for seedlings' inactivity and growth perfectly due to the effect of specific ions. At the same time, the relatively salinity tolerance (RST) of the seedlings, the green mass, and the roots showed noticeable reductions under the effect of salinity, especially (NaCI) as compared to (Na2S04). So, the devaluation of RST itself was more related to the reduction in the green mass. | ||
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