DYNAMIC OF STARCH CONTENT IN GRAFTED AND UNGRAFTED MATERIAL OF GROUND COVER ROSES DURING WINTERING PREPARATION
Journal Title: Наукові доповіді НУБіП України - Year 2017, Vol 3, Issue 3
Abstract
Rose-trees are widely used for planting of greenary. It is literally manmade group. These plants were grown specially for home landscaping and stairs stands. Buds grafting of different groups, which are characterized as continuous flowering, are used for growing rose-trees. «Rose-trees» are very spectacular. We need graftings by sprouts at a height of 1-1,7 m. to get such rose-trees, hybrid tea roses, climbers, ground cover roses. Rose-trees in the shape of miniature roses with a height of 0,5 m. are also made. Most of roses for gardening are sensitive to low temperatures and they do not always survive in winter conditions. It is thought that their graftings for enduring kinds of roses can make for both of increasing of their winter hardiness and landscape improvement. It is known about influence of rootstocks on different characteristics of grafting material. So, it was determined, that type of rootstocks doesn’t influence on chlorophyll content in the leaves, but it can provide carbohydrates accumulation in them. It is also known about influence of rootstocks on winter hardiness of grafting material’s horticultural crop. Starch analysis in different plant tissues is used for diagnostic of winter hardiness and frost resistance of woody plants. But it is known, that hydrolysis of starch in winterhard garden plants is occurred early than in sensitive to frost ones. Studying the dynamics of starch accumulation during transition from growing season to dormant period of different kinds and groups of roses shows that this index is significantly changed during winter measures. However, level of these changes is different. Starch content in roses which are resistant to low temperatures decreases faster than in non-tolerant ones. Group of ground cover roses has special ornamental nature, both the blossoms and fruits, leaves of these plants give amazing impression, they perfectly decorate landscape. Besides these, ground cover roses have very full blossom and they are very frost resistant. The most part of ground cover roses is wintering under snow, only some kinds need small covering. However, this group of plants can’t survive in some periods of low temperatures. As it was said early, now it is widely practiced cultivation of rose-trees which are grafted on Rosa canina. We can use others resistant kinds of roses as a rootstock, such as Centifolia rose. Influence of this rootstock on ability for rose-trees wintering haven’t studied yet.
Authors and Affiliations
M. A. Мelnik, О. V. Dubova, V. О. Lyakh
Keywords
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