%0 Journal Article
%T Biochemical and Mineral Responses of Okra Seeds (Abelmoschus esculentus L. Variety Marsaouia) to Salt and Thermal Stresses
%A B.D. Besma
%A D. Mounir
%J Journal of Agronomy
%D 2010
%I 
%X The present research has studied the effects of NaCl and temperature on germination and emergence of okra. Studies were carried out with seeds of a local okra variety (Marsaouia) subjected to 0 and 100 mM NaCl, performed in the dark at 10, 15, 25, 35 and 40ˇăC at germination stage and by 12 h light at emergence stage. The cumulative germination percentage, the cumulative emergence percentage, starch content, the reducing sugars levels, total amylase activity, sodium and potassium accumulation were quantified in germinated seeds at 15ˇăC, 25 and 35ˇăC. Temperature presented a significant effect on salt sensitivity of this species at germination and emergence stages. Germination of okra seeds was completely inhibited at 10 and 40ˇăC. The best germination and emergence temperature was recorded at 25ˇăC. The adverse effect of salt was more pronounced at low and high temperature. During the salt stress treatment, the level of starch reserves was higher at 25ˇăC and lower at 15 and 35ˇăC, an increase in reducing sugars content in cotyledons was observed. The activity of total amylase was most intensive at lower temperature in control seeds and at higher temperature in salt treated seeds. The sodium concentration on germinated seeds increased significantly at 15 and 35ˇăC, but potassium amount did not change regularly within thermal and salt stress interaction.
%K amylase activity
%K reducing sugars
%K Starch
%K sodium
%K potassium
%U http://docsdrive.com/pdfs/ansinet/ja/2010/29-37.pdf