Effects of exogenous bacterial quorum-sensing signal molecule/messenger N-hexanoyl-L-homoserine lactone (C-HSL) on acorn germination and plant growth of Quercus robur and Q. rubra (Fagaceae)

The effect of pre-sowing priming with N-hexanoyl-L-homoserine lactone (C6-HSL) solution (300 mg/L) on acorn germination and morpho-phenological characteristics Quercus robur Q. rubra was studied under laboratory conditions. After priming, 93.4% acorns germinated that exceeded the control by 32.2%, while number sprouted increased within error limits 5% more than amounted to 90%. According morphological characteristics, 47-day-old plants were divided into following groups: acorns, sprouts seedlings juvenile leaves, whereas among rubra, true leaves selected. A group detected only in samples primed C6-HSL. Priming induced differential changes cotyledon biomass both species accelerated nutrient utilization seedlings. We observed a positive growth accumulation negative effect, except for third group, those rubra. dry weight seedling roots shoots increased, respectively, 103% 153%. C6-HSL an increase number, length, total area leaves. These pronounced Alterations root system architecture towards formation numerous additional lateral recorded species. Thus, activated stimulated decelerated Exogenous did not eliminate syndrome unfriendly oak species, but improved viability