AGRICULTURAL BIOLOGY, 2016, V. 51, ¹ 5, pp. 714-721 UDC 635.1/.7:581.524 ISSN 2412-0324 (English ed. Online) (SEL’SKOKHOZYAISTVENNAYA BIOLOGIYA) ISSN 0131-6397 (Russian ed. Print) ISSN 2313-4836 (Russian ed. Online) doi: 10.15389/agrobiology.2016.5.714rus doi: 10.15389/agrobiology.2016.5.714eng THE APPEARANCE OF THE INDUCED DORMANCY IN SEEDS OF SOME Umbelliferae VEGETABLE CROPS UNDER THE EFFECT OF ALLELOPATHIC SUBSTANCES A.F. BUKHAROV, D.N. BALEEV All-Russian Research Institute for Vegeculture, Federal Agency of Scientific Organizations, 500, Vereya, Ramenskii Region, Moscow Province, 140153 Russia, e-mail baleev.dmitry@yandex.ru Received March 3, 2016 A b s t r a c t Allelopathic effects in plants are due to a combination of many adaptive and environmental factors having evolutionary and economic importance. <...> Currently the investigations on the effects of allelopathic substances on seed germination in order to develop new environmentally friendly approach to plant protection against weeds are in progress. <...> The main goal of our experiments was to examine the peculiarities of the seed dormancy induced under the influence of an extract from seeds of dill (Anethum graveolens L.) variety Kentavr and specific overcoming of the dormancy in various vegetable crops — carrot (Daucus carrota L.) variety Rogneda, root parsley (Petroselinum crispum (Mill.) Nyman ex A.W. Hill.) variety Lyubasha, celery root (Apium graveolens L.) variety Kupidon, lavage (Levisticum officinale W.D.J. Koch) variety Don Zhuan, coriander (Coriandrum sativum L.) variety Yantar’, and parsnip (Pastinaca sativa L.) variety Kulinar. <...> The seeds of tested crops were treated with 15 % aqueous extract from dill seeds at 23 C for 0 (control), 5 and 20 days in the dark. <...> A germination of the treated seed germination was studied in dynamics at different temperature conditions — 20 C (control); 3 C; and 3 C (8 hours)/20 C (16 hours). <...> We calculated Tip (initial period, i.e. the time prior to seed germination starts), Twagt (the weighted average germination period, i.e. the time to reach maximum germination rate) and T50 (the time to reach 50 % germination), measured the embryo length and calculated the temperature coefficient (Q10). <...> It <...>