Preliminary study on the effect of temperature and salinity on germination and growth at the early seedlings stages of tomato : (lycopersicon esculentum mill.)‎

الملخص EN

Laboratory experiment in Petri dishes was conducted to know the effect of different temperatures C on seed germination of tomato varieties (Supermarimond and Castle) (15, 20, 25, 30 and 35 Rock).

Results showed that, the appropriate temperature for germination was ranged between (20-30) C for both varieties seeds, and the highest percentages of seeds germination of Supermarimond % 86) occurred after three days of the beginning-83 %-% 93) whereas, for Castle Rock was -91 %) process of seed germination in distill water.

The other experiment in Petri dishes also was adapted to study the effect of different salts NaCl, CaCl2, Na2S04 and a mixture of salts at a ratio of (1 : 1 : 1) weight basis of the concentrations (4, 8 and 12) dS / m , in addition to distilled water as a control on the seeds germination and growth as lengths of plumes and radicles and their dry matter weights of tomato varieties seedlings .

Results showed that, the increases of salts concentrations caused a decrease in seeds germination percentages, lengths of plumes and radicles and their dry matter weights.

It was observed that, the germination and growth were more affected at the treatments of NaCl as compared with the other salt treatments, whereas salt mixture treatments have less effect.

There were significant differences between varieties towards different salt concentrations treatments of the different salts.