جستجوی مقالات مرتبط با کلیدواژه « صفات فیزیولوژیک » در نشریات گروه « بیوتکنولوژی و ژنتیک گیاهی »

Different concentrations of Zn and Cd (0, 2 and 4 mg L-1) were tested on the growth and some physiological traits of two spinach cultivars (common seed and Thorny seeds) as factorial based on Completely Randomized Design. The results revealed that the highest plant fresh weight was attained by 2 mg L-1 of Zn treatment. For dry weight, the highest data was belonged to Thorny seeds and the tallest plants were belonged to common seed spinaches. The top catalase content was belonged to 4 mg L-1 Zn with thorny seed. H2O2 content was affected by 2 mg L-1 of Cd in common seed cultivars. The highest Cd content in plant was measured with 4 mg L-1 of Cd at both cultivars. The greatest Zn content was recorded by Thorny seed spinach × leaf sample of 4 mg L-1 Zn and with common seed × leaf sample of 2 mg L-1 Zn.  For K+, the highest data was gained by Thorny seeds spinach × leaf sample of 4 mg L-1 of Zn, Thorny seeds spinach × root sample of 2 mg L-1 Zn and common seed × root sample of 2 and 4 mgL-1 of Zn. For Ca 2+ concentrations, Thorny seeds spinach × leaf sample of controls had the highest content. The highest Mn2+content was recorded by common seeds × leaf sample of 2 and 4 mg L-1 of Zn treatment. The evaluation of the tolerant plants having reasonable growth potential under the excess metal contaminated soils is quite emergent. Since, spinach is a fast growing and multi harvest plants during a year and, there is some reports on the hyper-accumulative behavior of the plant. So, it seems that the plant would be a nice candidate for the phytoremediation ideas and applications.

The present study was performed to evaluate the effects of different concentrations of ethyl methane sulfonate (0, 0.1, 0.2 and 0.5%) on some physiological characteristics of regenerated plants from calli of stevia at 30, 60 and 120 min under various levels of salinity stress (0, 50 and 100 mM of NaCl). This experiment was carried out based on completely randomized two-factorial designs with three replications. With respect to the result, the regenerated calli became dark and hidden in the medium under exposure time of 120 min, the length of stem regenerated calli was increased under exposure times of 30 and 60 min. Moreover, our data showed that EMS mutagenesis had a significant effect on physiological traits of regenerated stevia under salinity stress at the probability level of 1%. Consequently, the stevia mutants of M10, M11, and M19 showed the highest resistance to different levels of salinity which can be considered as potential samples for further breeding programs.