Seed productivity features of Lophanthus anisatus (Benth.) (Lamiceae) under introduction

The purpose of research is to study the features of the seed productivity of aniseed lofant when introduced in the steppe zone of Khakassia for further use as a medicinal, ornamental and melliferous plant. The study was carried out in 2020 in the introduction nursery of the Research Institute of Agrarian Problems of Khakassia. Potential seed productivity (PSP), real seed productivity (PSP), and percentage of semenization (PS) were determined. The species belongs to late summer flowering - flowering occurred in the third decade of July. High rates of variability in the length of inflorescences of the central and lateral thyrsus, the number of flowers in cymoids (V = 20.1 to 25.3 %) were revealed. The number of cymoids of the central and lateral thyrsi varied at an average level - 17.65 and 19.71 %, respectively. The PSP of the central thyrsus averaged 2132.72±34.97 ovules, the lateral one - 831.00±109.57, the PSP - 1507.88±41.56 and 474.50±80.08, respectively. The PSP of an individual was 13,837 ovules, the PSP was 9433. PS characterized the degree of realization of the potential for seed formation and reached 73.28±2.01 % for the central thyrsus, and 57.70±6.91 % for the lateral thyroid. The lowest indicators of variability were observed in the mass of 1000 eremos and their length, both central (V = 7.27 and 6.27 %) and lateral thyrsi (V = 6.70 and 5.55 %), respectively. Correlation relationships between the mass of 1000 seeds and their size characteristics are weak negative (r = from -0.005 to -0.076). The germination rate of freshly harvested seeds of the central thyrsus was 48.5 %, of the lateral one - 37.2 %. When storing seeds for a year, the germination rate increased to 61 %. The conditions of the steppe zone of Khakassia make it possible to fully realize the reproductive potential of anise lofant for its cultivation.