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Ultima descărcare din IBN: 2021-11-23 11:03 |
Căutarea după subiecte similare conform CZU |
634.1:631.527.6 (1) |
Cultura fructelor (1456) |
Lucrări agricole (1239) |
![]() TABĂRA (GORCEAG), Maria. Mechanism of cytokinins in microcloning of fruit shrubs. In: Patrimoniul cultural de ieri – implicații în dezvoltarea societății durabile de mâine, Ed. 3, 11-12 februarie 2021, Chişinău. Chișinău, Republica Moldova: 2021, Ediția 3, pp. 209-210. ISSN 2558 – 894X. |
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Patrimoniul cultural de ieri – implicații în dezvoltarea societății durabile de mâine Ediția 3, 2021 |
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Conferința "Yesterday’s heritage – implications for the development of tomorrow’s sustainable society" 3, Chişinău, Moldova, 11-12 februarie 2021 | ||||||
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CZU: 634.1:631.527.6 | ||||||
Pag. 209-210 | ||||||
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Most cultivated plants, especially those that grow vegetatively, are frequently contaminated with viral and bacterial infections. Plant diseases lead to decreased productivity and decreased quality. It has been established that in pathogen-free plants, productivity can be increased by approx. 30%. One of the methods of plant healing, widely applied to many baciferous cultures, is clonal multiplication with the use of apical meristem cultures. The basic method, used to micropropagate plants, is induced by activating the meristems already existing in plants, based on removing the apical dominance and developing adventitious buds. These can be achieved in two ways: by removing the apical meristem of the stem and microbutting the shoot in vitro on a hormone-free medium and supplementing the nutrient environment with cytokinin-like substances, which induce the development of a large number of lateral shoots. It is usually used as a cytokinin; 6-benzylaminiopurine (BAP), 6-furfurylaminopurine (kinetin), 2-isopenteniadenin (2ip) and zeatin. The physiological effect of cytokinins acts on plant cell division, strongly stimulates bud formation and are antagonists of rhizogenesis, stimulates protein synthesis and protects metabolites from the action of hydrolyzing enzymes, which gives cytokinins an important role in preventing senescence. The shoots obtained, in this way, are removed from the primary maternal explant and again grown independently on the freshly prepared nutrient medium, which stimulates the proliferation of axillary meristems and the appearance of higher-order shoots. Currently in the Laboratory of Embryology and Biotechnology of the National Botanical Garden (Institute) “Alexandru Ciubotaru”, micropropagation technologies are developed with the obtaining of a high coefficient of multiplication of fruit-bearing shrubs such as: Lyciumbarbarum L., Rubusfruticosus L., Actinidiakolomikta., Schisandrachinensis L., Lonicerakamtschatica L. and Corylusavellana L. |
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