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5. Write the summary of the text above.

6. Retell the text “a screening test for the determination of cut flower longevity and ethylene sensitivity of carnation”.

7. Translate from Russian into English:

1) Цветы были срезаны на ранней стадии открытия цветка и незамедлительно отправлены в лабораторию Университета Альмерии, Испания.

2) Первую группу цветов подвергали воздействию 10 ppm концентрацией этилена в течение 8 часов, другие группы цветов (контрольные) выдерживали в дистиллированной воде в обычных температурных условиях тоже в течение 8 часов.

3) В конце обработки срезанных гвоздик черенки были пересажены в систему гидропоники на 30 дней.

4) Питательная система состояла из полистирольных панелей, плавающих в полистироловых лотках, заполненных 10 литрами питательного раствора.

5) Нагрев был установлен таким образом, чтобы поддерживать температуру не ниже 22 ° С, а относительная влажность не менее 65% поддерживалась системой тумана.

Unit VI

Texts:

1. Evaluation of dormancy break in some selected peach (Prunus persica) cultivars

2. Testing the winter hardiness of selected chrysanthemum cultivars of Multiflora type

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

4. Timer versus moisture sensor-based irrigation control of soilless lettuce: Effects on yield, quality and water use efficiency

Active Vocabulary 1

abrupt [əˈbrʌpt] – внезапный, неожиданный, резкий

dormant [ˈdɔːrmənt] – состояние покоя

perennial plants [pəˈreniəl ˈplænts] – многолетние растения

shoots [ˈʃuːts]- побеги

flower buds [ˈflaʊər ˈbədz] – цветочные бутоны

exogenous [ekˈsɑːdʒənəs] – экзогенный

endogenous [enˈdɑːdʒənəs] – эндогенный

cell cycle [sel ˈsaɪkl] – цикл клетки

chromatin modification [ˈkrəʊmətɪn ˌmɑːdɪfɪˈkeɪʃn] – модификация хроматина

1. Translate the following word combinations into Russian:

Similarly to apricot; sensitive to frost damage; buds are already dormant; the survival of perennial plants; the woody fruit species; individual genotypes and cultivars; paradormancy, endodormancy and ecodormancy; endogenous factors; exogenous factors

2. Read the following text and say:

a) what the term “dormancy break” means;

b) what subjects are touched upon in the text

Text 1. Evaluation of dormancy break in some selected peach (Prunus persica) cultivars

Similarly to apricot and almond trees, peaches are sensitive to frost damage, especially during spring months when abrupt drops in air temperatures may occur. In winter, buds are already dormant so they are usually not damaged by frosts. This means that dormancy is one of the most important adaptation mechanisms that enable the survival of perennial plants in winter periods of low temperatures. The process of dormancy thus determines how the woody fruit species can survive during the winter season and early spring without any damage to shoots and, above all, flow­er buds. The final number of flowers that remain after budding or (better to say) the density of their setting is an important factor that influences the fruit-bearing of peach trees. The process of the development of flower buds in indi­vidual genotypes and cultivars is genetically fixed. Certain changes in the character of the develop­ment of flower buds can be caused by the manner of cultivation, environmental conditions and by some other factors, e.g. age of the orchard, health condition of trees, rootstock, growing technology etc.

Dormancy has been studied and reviewed by many authors. It had been defined several stages of dormancy, viz. paradormancy, endodor­mancy and ecodormancy. Both exogenous and en­dogenous factors that influence this process were studied and analyzed in many research studies. As far exogenous factors were concerned, effects of day length and temperature were investigated while studies on effects of endogenous factors were focused on the role of growth regulators, regula­tion of the cell cycle, water, chromatin modifica­tion, other means that the process of dormancy represents a domain that still offers possibilities to discover new finding and new facts.

In peach trees, the dormancy of flower buds has also been studied and reviewed by many au­thors. It was characterized the dormancy of flower buds from biological and bio­chemical points of view. It was also described in detail these morphological and anatomical changes of flower buds that took place in the course of the dormancy process. Some scientists studied the effect of temperature on the course of dormancy.