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4. Answer the following questions:

1) What is the production of small-blossoming chrysanthemums in the Czech Republic in recent years?

2) Why are they becoming increasingly popular?

3) What affects the overwintering of herbaceous perennials directly and indirectly?

4) By what is determined the hardiness of perennial herbaceous species?

5) The research is focused on monitoring and testing the frost hardiness in Research Institute for Landscape and Ornamental Gardening, isn’t it?

5. Write the summary of the text above.

6. Retell the text “Testing the winter hardiness of selected chrysanthemum cultivars of Multiflora type”.

7. Translate from Russian into English:

1) Мелкие цветущие хризантемы Chrysan themum × grandiflorum (Ramat.) Kitam в течение последних лет являются одними из наиболее культивируемых декоративных растений в Чешской Республике, их производство превысило миллион единиц.

2) Выращивание этих растений в первую очередь не предназначено для перезимовки, но некоторые сорта имеют зимостойкость, спонтанно кодированную в их геномах и могут успешно зимовать в климатических условиях Чехии.

3) Существует сложный набор адаптационных процессов и сложных функций, включая морозостойкость, устойчивость к переменному замораживанию и оттаиванию и механическому повреждению органов, а также устойчивость к болезням, ледяному покрову и зимней засухе.

4) Зимостойкость однолетних травянистых видов определяется их способностью переносить широкий диапазон внешних стрессов, таких как колебания температуры, высокие уровни влажности почвы, ледяной покров, частичное вытягивание из почвы и действие патогенных организмов при низких температурах.

5) Цель этой работы состояла в том, чтобы определить сорта зимостойкости из нового ассортимента хризантем исследовательского института по ландшафтному и декоративному садоводству.

Active Vocabulary 3

garlic [ˈɡɑːrlɪk] – чеснок

shelf life [ʃelf laɪf] – срок годности

storability [stɔːrəˈbɪləti] – хранение, сохранность

genus [ˈdʒiːnəs] – род, вид, сорт

bulbil [bʌlbi] – зубок, луковичка

propagation [ˌprɑːpəˈɡeɪʃən] – размножение

benzyladenine (BA) [ˈbenzɪl ˈadɪniːn] – бензиладенин (БА)

1-naphthyl acetic acid (NAA) [naftiːl əˈsetɪk ˈæsɪd] - 1 –нафтилуксусная кислота (NAA)

the Murashige-Skoog medium con iP (N6-(2-isopentenyl) adenine [ˈadɪniːn] – cреда Мураcиге-Скуга (N6- (2-изопентенил) аденин

MS medium[|ˈmiːdiəm] – среда Мураcиге-Скуга

1. Translate the following word combinations into Russian:

garlic production; products of a dull taste and a short shelf life; the onion genus; hardneck garlic; softneck garlic cultivars; virus-free planting material; potential propagation in vitro; vegetatively propagated leek plants.

2. Read the following text and say:

a) what the term “effects of garlic genotype” means;

b) what subjects are touched upon in the text

Text 3. Effects of garlic genotype on cloves formation under in vitro conditions

In the Czech Republic, the need of garlic production is still very actual because consumers are not interested in products of a dull taste and a short shelf life (i.e. storability) that are imported from abroad. Under climatic conditions of the Czech Re­public, garlic (Allium sativum L.), a species belong­ing to the onion genus Allium, does not produce seeds. Flower stems with bulbils and sterile flowers formed by hardneck garlic develop on plants belonging to the group of softneck garlic cultivars only under extreme conditions. The most impor­tant problem of garlic production is to obtain sufficient amounts of virus-free planting mate­rial of good quality. This problem can be solved by means of vegetative propagation and sanitation of plants under in vitro conditions on the basis of a good knowledge of physiological growth reactions of individual cultivars – genetic origin, external conditions, potential propagation in vitro, gas production etc.

The first studies on in vitro propagation of garlic (Allium) plants were focused on effects of different concentrations of N6-benzyladenine (BA) and 1-naphthyl acetic acid (NAA) in the medium on formation of young plants from flower heads and stem base. In cloned, veg­etatively propagated leek plants, no morphologi­cal and cytological changes were observed and it was possible to transfer and cultivate them under in vivo conditions. Another study deals with in vitro propagation and the establishment of garlic primary cultures from root segments of 8 garlic cultivars on the Murashige-Skoog medium con iP (N6-(2-isopentenyl)adenine) as well as with pos­sibilities of optimisation of the so-called “regenera­tion” on the MS medium containing 8.8 μmol of BA and 0.1 μmol of NAA.

Within the framework of physiological studies, the formation of storage organs is supported by lower temperatures, reduced light intensity and in­creased humidity.

ABA plays an important role in processes of embryo maturation, storage of reserve proteins and seed ripening. In vegetative buds, this compound maintains their dormancy and this situation is mentioned also in garlic.