The life cycle and yielding of Lycopersicon esculentum L. (Mill) pretreated with deuterium depleted water and nano magnetic particles

The main goal of this investigation was to reveal the effect of deuterium depleted water (DDW) upon the first (germination) and the last one (yield) life cycle of Lycopersicon esculentum Mill. (tomatoes) in water stress condition. Specifically, growth methods were applied. The obtained data were statistically processed (Ceapoiu, 1968). There were pointed out the differences and proportionality in germination dynamics when the seeds were pretreated with DDW and a mixture of DDW with NMP (Nano Magnetic Particles). The descendants of different fruits/plants were analyzed. In comparison to Control (H2O-d) in DDW the germination was repressed in one descendant (4.4%) or contrary it was stimulated on other descendant (12.7%). In presence of NMP suspended in DDW, the seed indices were higher: 13.1% for the basal fruit and 22% for the upper one. In the plants cultivated in water well supplied or under water stress conditions the yield was higher i.e. 94.68 t/ha and 62.76 t/ha, respectively. The difference of 31.92 t/ha emphasizes the favorable effect of initial treatment. The DDW pretreatment induced favorable biological effects expressed in a high yield in both groups (normal and stressed). The average yield/surface unit was the highest. The life cycle was prolonged in high yielding descendants. In their case after 105 days only 2% of total yield was gathered. Short phenophases developed the stressed plants. The maturity took place earlier on stressed plants yielding 8% from total production after 105 days.The pretreatment with DDW or DDW and NMPs is useful for practical purposes in case of tomatoes varieties in which technology nursery transplant is an important stage in cultivation. (authors)