Some Features of Implementation of Source-Sink Relations in Violation of the Integrity of the Root System of Seedlings of Triticum aestivum L.
The object of the study was sprouts of spring soft wheat Triticum aestivum L. Cultivation was carried out in a climatic chamber at a temperature of 18 ± 1°C under the conditions of a sixteen-hour photoperiod and complete etiolation. The experiment was carried out in the following options: removed the main germinal root; decapitation; removed the lower tier of germinal roots. Removing part of the root system of plants cultivated under a sixteen-hour photoperiod increases the root index and reduces the total length of the root system. With the removal of the main root and the roots of the lower tier, the root availability index of plants grown during the sixteen-hour photoperiod does not change significantly, while decapitation leads to a decrease in the root availability index. Violation of the integrity of the root system of etiolated seedlings leads to a decrease in the mass of the seedling and the root support index in plants lacking a lower pair of roots; increase root supply of the seedling when removing the main root. Removing the tip of the main root contributes to an increase in the root index without having a statistically significant effect on the length of the root system, the mass of seedlings and roots, and the mass ratio of root / shoot.
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