Browsing by Subject "Germination"

Now showing 1 - 3 of 3

Open Access
Effect of Cadmium (Cd) stress on the germination and early seedling growth of Mustard seeds (Brassica campestris L.): deducing a dose - response relationship
(University of North Bengal, 2014-03) Sarkar, Abhijit; Sengupta, Chandan
Due to severe heavy nmetals contamination in agricultural soil worldwide, several studies specifically focused on the development of metal accumulating crop plants, which can maintain their optimum growth and production in contaminated soil. Mustard plants (Brassica campestris L.) are in generally considered as the hyper accumulator, can be grown advantageously for phytoremediation of the lands contaminated by industrial wastes. Therefore, the effect of varied cadmium (Cd) concentrations on the germination and initial growth of mustard seeds were investigated under controlled laboratory conditions. Results showed a differential response of mustard seeds under varied Cd concentrations. The lower levels of Cd affected the mustard seeds positively or neutrally; but the higher Cd levels showed significant adverse effect. We conclude that as mu_tard being a hyper-accumulator of several metals can only be grown at lower Cd levels for their optimum performance.
Open Access
Effect of copper on seed germination, root elongation and shoot elongation of seedlings of commercially cultivated tea varieties
(University of North Bengal, 2013-03) Mandal, Sima; Saha, Aniruddha; Saha, Dipanwita
Tea (Camellia sinensis L. (0.) Kuntze) is an economically important plantation crop of India but is prone to attack by several fungal pathogens. Copper based fungicides are being used for decades to control fungal disease in tea which may lead to accumulation of copper in the soil. The aim of the present work was to investigate toxic effect of Cu+2 on seed germination, growth and morphological changes in tea seedlings. Different concentration of copper sulphate was applied on three different commercially cultivated tea varieties (TS-462, TS-520 and TS-463). The effect of different concentrations of copper (0.5 – 8 mM) on seed germination, root elongation and shoot elongation of the tea plant were evaluated. Percent germination was found to decrease progressively with increasing concentrations of Cu+2. Maximum reduction of seed germination was showed by TS-463. Several damaging effects such as reduced root hair proliferation, structural deformation and reduction in length of root and shoot were observed when the germinated seedlings were allowed to grow at higher concentrations of copper solutions. Decrease in the dry mass of both root and shoot were also recorded. The results showed that excess copper have negative effect on germination of tea seeds and subsequent growth of the seedlings.
Open Access
Influence of tungsten and molybdenum on seed germination and early seedling growth of wheat - a comparative study
(University of North Bengal, 2012-03) Kumar, Anil; Aery, NC
Fifty one promising landraces of rice cultivars of three districts viz. Nadia, 24 Parganas(N) and MA comparative study on the effect of tungsten and molybdenum on seed germination and early seedling growth of wheat was carried out. Both W and Mo influenced the seedling growth in similar fashion. W and Mo enhanced the germination relative index at lower application. Relative yield increased at lower applied doses of W as well as Mo whereas at higher application it decreased. Lower applied doses of W and Mo showed maximum index of metal tolerance. Higher applied doses of both metals showed toxic effect on plant growth. A highly significant (p= 0.01 in W and p = 0.001 in Mo) increment in grade of growth inhibition (GG) at the higher administration of W and Mo was observed. The toxic effect of tungsten on wheat was more marked than molybdenum.