INFLUENCE OF ROOTSTOCKS AND APPLING MYCORRHIZAL VACCINE ON THE GROWTH OF MAIDEN TREES AND TREES THERE YEARS AF- TER PLANTING OF WOODII CULTIVAR

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Acta Sci. Pol., Hortorum Cultus 7(4) 2008, 3-11 INFLUENCE OF ROOTSTOCKS AND APPLING MYCORRHIZAL VACCINE ON THE GROWTH OF MAIDEN TREES AND TREES THERE YEARS AF- TER PLANTING OF WOODII CULTIVAR S awomir wierczy ski University of Life Sciences in Pozna Abstract. In the experiment, carried out between 2005 2007, the influence of the application of two rootstocks and mycorrhizal on the growth of maiden trees and the trees of Woodii cultivar in the third year after planting them into the ground was compared. A higher percentage of maiden trees was obtained on Prunus tomentosa rootstock when mycorrhizal was applied as well. The applied rootstocks did not differ the growth of maiden trees in a nursery. Also the use of mycorrhizal did not cause any significantly stronger growth of maiden trees on both rootstocks, what is more they even reduced the sum of the lengths of lateral shoots. The reaction of rootstocks was differentiated. The considered rootstocks, however, influenced all the parameters of growth of trees in the third year after planting. Stronger growth of Woodii cultivar trees was observed on the Prunus cerasifera rootstock compared with those growing on Prunus tomentosa. However, the trees growing on the Prunus cerasifera rootstock bloomed poorer than those on Prunus tomentosa. Application of mycorrhizal increased the thickness of the tree trunk and the diameter of crowns of Woodii cultivar trees, but it did not influence their flowering and fruiting. Key words. rootstocks, mycorrhizal, ornamental trees of Woodii cultivar, growth INTRODUCTION In the latest years, more and more deciduous trees, especially those that have colourful leaves through the whole vegetative period, are being planted in gardens and urban green areas. One of such trees is Prunus cerasifera in its Woodii cultivar. This plant has medium, purple-red leaves, that keep their colour till the end of its vegetative period [Seneta and Dolatowski 1997]. Additionally, the trees of this cultivar are resistant well Corresponding author Adres do korespondencji: S awomir wierczy ski, Department of Dendrology and Nursery Production, University of Life Sciences in Pozna, ul. Szamotulska 28, 62-081 Prze mierowo, e-mail: kdis@au.poznan.pl

4 S. wierczy ski to drought, which is a big advantage for their use in green areas. In a nursery production the above mentioned cultivar is propagated through grafting on Prunus cerasifera rootstock. In a nursery a growth of maiden trees is dependant on various factors, among others, on the type of the applied rootstock [G sto and Poniedzia ek 1998, Webster and Hollands 1999], the quality of the soil, fertilization and on the way the maiden trees are cherished. Recently a big interest has been also put on the use of mycorrhizal fungi [Cordier et al. 1996, Kubiak 2005, Badura 2007, Bre et al. 2007, Krupa 2007, Ksi niak 2007, Kubiak 2007, wierczy ski and Stachowiak 2007]. Mycorrhizal fungi can support the growth of trees, especially after planting the trees into their final location. In new biotopic conditions, when the plant is exposed to physiological dangers and an attack of pathogenic micro-organisms the coexistence with fungi can make the process of adaptation easier [Ksi niak 2007]. Ability of mycelium to gain the nutrients unaccessible, but necessary to plant growth and development, enables to reduce the fertilizer application just to 50% of dose recommended until now. An important role is credited to the ability of mycorrhizal fungi to neutralizing effects of heavy metals and other toxic substances on the plants [Kubiak 2005, Krupa 2007]. The studies being carried out enable to identify the biological phenomenon of mycorrhize as a fertilizer, biological preparation and regulator. Various mycorrhize functions and their impact on natural environment are being recognized more and more extensively. Special attention is paid to reduction of chemical plant protection and the pest control. The research results obtained until now indicate the necessity of further studies because of rising costs of fertilization, plant protection and natural environment protection [Kubiak 2005]. The aim of the experiment was the evaluation of the growth of maiden trees and the trees of Woodii cultivar in the third year after planting on two rootstocks. At the same time, the influence of mycorrhizal on the growth of maiden trees and the trees in this cultivar was examined. MATERIAL AND METHODS The studies were conducted at the Experimental Station in Baranowo of the University of Life Sciences in Pozna in the years 2005-2007. The experiment was set up in random blocks design, in four replications, with 50 rootstocks planted per plot. Maiden trees of Woodii cultivar were produced in a nursery on two rootstocks: (Prunus cerasifera Ehrh.) and (Prunus tomentosa Thunb.). During the first year of the production of maiden trees, in June, mycorrhizal in a dose of 1,000 units per 1 plant was introduced into the root systems of half rootstocks per plot. At the end of the second year, the number of obtained maiden trees, compared with the number of budded rootstocks, was calculated. The following measurements and observations were conducted in autumn, after the end of the vegetative period: height of maiden trees (cm), their thickness (mm) 30 cm above the ground, number of lateral shoots and sums of their lengths. The measurements and observations were performed on 15 randomly chosen maiden trees per plot Acta Sci. Pol.

Influence of rootstocks and appling mycorrhizal on the growth of maiden trees... 5 In the second part of the experiment, in spring 2005, trees of Woodii cultivar were planted into their final place, in randomised block, in four repetitions, eight plants per plot. In June 2005 one dose per tree of mycorrhizal, manufactured by Mykoflor, was introduced into the root systems of the trees. In 2007 the number of flowers and fruits on a tree was counted. In autumn of the same year height (cm), size of the crown (cm, average value height and width along and across row) and thickness (mm) of the trunk of trees were measuremed. Statistical analysis of the results was carried out with the use two-factor variance analysis, using Duncan s test at the confidence level = 0.05. The data presented in tables are connected with the growth of maiden trees and they are the mean values of two-year measurements. RESULTS The percentage of the obtained maiden trees of Woodii cultivar depended on the rootstock and the application of mycorrhizal. A significantly bigger percentage of the obtained maiden trees was noted for Prunus tomentosa rootstock rather than for Prunus cerasifera. Also the use of mycorrhizal caused significantly better efficiency of maiden trees than its lack (tab. 1). Table 1. Influence of rootstock and mycorrhizal on the percentage of obtained maiden trees of Woodii (average value for the years 2006 2007) Tabela 1. Wp yw podk adki i szczepionki na procent otrzymanych okulantów odmiany Woodii ( dla lat 2006 2007) Mycorrhizal Average value for rootstock dla podk adki Prunus cersifera 56.4 ab * 47.7 a 51.9 a Prunus tomentosa 67.6 c 58.4 bc 63.1 b 62.1 b 52.9 a *Means followed by the same letters do not differ significantly at = 0.05. * rednie oznaczone tymi samymi literami nie ró ni si miedzy sob przy = 0,05. The height and thickness of the maiden trees did not depend on the rootstock and the application of mycorrhizal. A little bit thicker maiden trees were obtained on Prunus cerasifera rootstock than on Prunus tomentosa, but the results did not differ significantly (tab. 2). The used rootstocks and mycorrhizal did not significantly differentiated the number of lateral shoots of Woodii cultivar. The biggest number of lateral shoots was obtained on Prunus tomentosa rootstock without mycorrhizal fungi (tab. 3). Hortorum Cultus 7(4) 2008

6 S. wierczy ski Table 2. Influence of rootstock and mycorrhizal on the height (cm) and the thickness (mm) of maiden trees of Woodii cultivar (average value for the years 2006 2007) Tabela 2. Wp yw podk adki i szczepionki na wysoko (cm) i grubo (mm) okulantów odmiany Woodii ( dla lat 2006 2007) Height Wysoko cm Thickness Grubo mm Mycorrhizal rootstock dla podk adki Prunus cerasifera 166.2 a * 183.6 a 174.9 a Prunus tomentosa 179.1 a 174.3 a 176.7 a average value for 172.7 a 179.0 a Prunus cerasifera 18.9 a 19.4 a 19.2 a Prunus tomentosa 17.4 a 17.0 a 17.2 a average value for 18.2 a 18.2 a * Explanation: see Table 1. * Obja nienie: patrz tabela 1. Table 3. Influence of rootstock and mycorrhizal on the number and the sum of length of lateral shoots (cm) of maiden trees of Woodii cultivar (average value for the years 2006 2007) Tabela 3. Wp yw podk adki i szczepionki na liczb i sum d ugo ci p dów bocznych (cm) okulantów odmiany Woodii ( dla lat 2006 2007) Number of lateral shoots Liczba p dów bocznych Sum of length of lateral shoots Suma d ugo ci p dów bocznych cm Mycorrhizal rootstock dla podk adki Prunus cerasifera 17.7 a * 20.7 a 19.2 a Prunus tomentosa 19.1 a 18.7 a 18.9 a average value for 18.4 a 19.7 a Prunus cerasifera 602.3 a * 794.7 d 698.5 a Prunus tomentosa 730.7 c 689.0 b 709.9 a average value for 666.5 a 741.8 b * Explanation: see Table 1. * Obja nienie: patrz Tabela 1. The presence of mycorrhizal fungi significantly diminished the average sum of the length of lateral shoots of maiden trees. The rootstocks did not affect much this feature of the growth of the trees. A better result of this parameter was obtained on Prunus Acta Sci. Pol.

Influence of rootstocks and appling mycorrhizal on the growth of maiden trees... 7 tomentosa with the application of mycorrhizal. On the other hand on Prunus cerasifera a worse result was obtained for mycorrhizal (tab. 3). In the third year after the trees were planted into the ground he height of the trees depended only on the rootstock. Significantly higher trees were obtained on Prunus cerasifera than on Prunus tomentosa. The application of mycorrhizal did not affect the height of the trees (tab. 4). Table 4. Influence of rootstock and mycorrhizal on the height (cm) and the thickness (mm) and the size of crown (cm) of trees of Woodii cultivar (in the year 2007) Tabela 4. Wp yw podk adki i szczepionki na wysoko (cm), grubo (mm), oraz rozmiar korony (cm) drzew odmiany Woodii (w roku 2007) Mycorrhizal Average value for rootstock dla podk adki Height Wysoko cm Prunus cerasifera 315.5 b * 297.5 b 306.5 b Prunus tomentosa 238.2 a 226.3 a 232.3 a 261.9 a 276.8 a Thickness Grubo mm Size of crown Rozmiar korony cm * Explanation: see Table 1. * Obja nienie: patrz Tabela 1. Prunus cerasifera 57.8 c * 52.9 b 55.4 b Prunus tomentosa 39.8 a 35.7 a 37.7 a 48.8 b 44.3 a Prunus cerasifera 243.8 d * 211.3 c 227.5 b Prunus tomentosa 175.0 b 155.0 a 165.0 a 209.4 b 183.1 a Both the applied rootstock and mycorrhizal influenced the growth and size of crowns of Woodii cultivar. On Prunus cerasifera thicker trees were obtained and their crowns had bigger dimentions than the threes growing on Prunus tomentosa. Also the presence of mycorrhizal fungi significantly increased the thickness and size of the tree crowns (tab. 4). The average number of flowers on a tree depended on the rootstock. A significantly bigger number of flowers was noted on Prunus tomentosa than on Prunus cerasifera. The influence of the mycorrhizal on the number of flowers was not important (tab. 5). The number of fruits on a tree was not much differentiated by a rootstock and mycorrhizal (tab. 5). Hortorum Cultus 7(4) 2008

8 S. wierczy ski Table 5. Influence of rootstock and mycorrhizal on the number of flowers and fruits of trees of Woodii cultivar (in the year 2007) Tabela 5. Wp yw podk adki i szczepionki na liczb kwiatów i owoców drzew odmiany Woodii (w roku 2007) Number of flowers Liczba kwiatów Number of fruits Liczba owoców Percentage of obtained fruits Procent otrzymanych owoców Mycorrhizal rootstock dla podk adki Prunus cerasifera 193.5 a * 234.0 a 213. 8 a Prunus tomentosa 478.0 b 617.0 b 547.5 b 335.8 a 425.5 a dla szczepionki Prunus cerasifera 119.5 a * 158.0 a 138.8 a Prunus tomentosa 129.0 a 178.0 a 153.5 a 124.3 a 168.0 a dla szczepionki Prunus cerasifera 61.5 b * 67.5 b 64.5 b Prunus tomentosa 27.0 a 28.8 a 27.9 a 44.3 a 48.2 a dla szczepionki * Explanation: see Table 1. * Obja nienie: patrz Tabela 1. The percentage of obtained fruits compared with the number of flowers was determined only by the rootstocks. On the rootstock Prunus divaricata was obtained bigger percentage than Prunus tomentosa (tab. 5) DISCUSSION In literature one can find opinions that Prunus tomentosa, as a rootstock, blends well with plum trees cultivars [Tretjak 1983, Michev 1990, Karychev and Jankova 1999, wierczy ski 2001]. The percentage of obtained maiden trees of Woodii cultivar on this rootstock in the conducted experiment, confirms these claims. The percentage of obtained maiden trees was depended on the applied rootstock. A similar dependence was observed by G sto and Poniedzia ek [1998]. Such influence of a rootstock on a final number of maiden trees was not confirmed by Grzyb and Sitarek [1996]. Taking into consideration a bigger percentage of the obtained maiden trees after the application of mycorrhizal it should be concluded that it can be connected with a better blending of buds with a rootstock after a budding process and their better winter survival, something that mycorrhizal fungi could have influenced. Acta Sci. Pol.

Influence of rootstocks and appling mycorrhizal on the growth of maiden trees... 9 In the discussed experiment maiden trees obtained on Prunus tomentosa had the height and thickness not different of those on Prunus cerasifera. It is not consistent with the results of Karychev and Jankova [1999], who obtained much weaker growth of plum maiden trees on Prunus tomentosa. The used rootstocks did not influence the results of height and thickness of maiden trees of Woodii cultivar. Also Grzyb and Sitarek [1996] did not notice any influence of the rootstock on weakening of power of growth of plum maiden trees in a nursery. But G sto and Poniedzia ek [1998] observed differences in the growth of plum maiden trees depending on the applied rootstock. The differences between the above mentioned experiments can result from the fact that different rootstocks were compared and that in the considered experiment an ornamental cultivar of Prunus cerasifera, not cultivated cultivars that were studied by the above mentioned authors, were examined. Aplication of mycorrhizal did not influence significant differentiation of the results of height and thickness of Woodii maiden trees. Borkowska [2007] claims that a positive influence of mycorrhizal on the growth of the trees may be seen only after a few years of the tree vegetation. The number of lateral shoots and the sum of their lengths did not depend on the applied rootstock. It speaks also for a similar power of growth of maiden trees growing on the considered rootstocks in a nursery. The difference can be noticed only in succeeding years of the tree growth. A negative influence of the mycorrhizal on the number of lateral shoots was noticed in the experiment. The presence of mycorrhizal fungi diminished the length of lateral shoots. In the first year of the tree growth in a nursery it may happen that, for their own growth, the mycorrhizal fungi will use some of the nutritive products that could nourish the tree. As a result, at the beginning of the co-existence between the plant and the fungi the plant does not take much benefit from the symbiosis than in the succeeding years. The growth of the trees in the third year after planting was differentiated by the applied rootstock. A significantly weaker growth of trees was observed on Prunus tomentosa rootstock. The results of thickness, height and size of crowns speak for it. A weaker growth of maiden trees growing in a nursery on this rootstock, noticed by Karychev and Jankova [1999] in the considered experiment was observed only in succeeding years of cultivation. Not always is the reduction in the power of growth, connected with the applied rootstock, observed in a nursery at once. Sometimes it can be seen after a few years. The presence of mycorrhizal fungi did affect the thickness and size of tree crowns in the third year after planting. It was supported by Borkowska s [2007] statement about a positive influence of mycorrhizal fungi on the growth of the trees. The applied rootstocks differentiated the number of flowers on a tree. Prunus tomentosa, as a weaker growing one induced a more intensive flowering than a stronger growing Prunus cerasifera. However, such a dependence was not observed in case of the number of set fruits. The application of mycorrhizal did not improve significantly the flowering and giving fruit. Hortorum Cultus 7(4) 2008

10 S. wierczy ski CONCLUSIONS 1. Percentage of the obtained maiden trees was higher on Prunus tomentosa and with the use of mycorrhizal. 2. Influence of a rootstock and mycorrhizal on the growth of maiden trees was not significant. 3. Application of mycorrhizal reduced significantly the sum of the length of lateral shoots of maiden trees. 4. A stronger growth of the trees in the third year after planting was observed on Prunus cerasifera. 5. Presence of mycorrhizal fungi increased significantly the thickness and the size of tree crowns of Woodii cultivar trees. 6. Prunus tomentosa, as a rootstock caused more intensive flowering of trees. REFERENCES Badura L., 2007. Wspó czesne pogl dy na znaczenie mikroorganizmów w yciu ro lin. Mat. Konf. Mikoryza w architekturze krajobrazu, Pozna, 7 8. Borkowska B., 2007. Co to s szczepionki mikoryzowe. Sad Nowoczesny 8, 56 57. Bre W., Baranowski T., Korszun S., Koz owska A., 2007. Wp yw grzybów mikoryzowych na zawarto c sk adników mineralnych w li ciach kasztanowca bia ego (Aesculus hippocastanum L.) Mat. Konf. Mikoryza w architekturze krajobrazu, Pozna, 18. Cordier C., Trouvelot A., Gianinazzi S., Gianinazzi-Pearson V., 1996. Arbuscular mycorrhizal technology applied to micropropagated Prunus avium and to protection against Phytophthora cinnamoni. Agronomie 16, 679 688. G sto M., Poniedzia ek W., 1998. Porównanie trzech podk adek generatywnych liw w szkó ce. Zesz. Nauk. AR w Krakowie 333, 415 419. Grzyb Z.S., Sitarek M., 1996. Przyjmowanie si oczek i wzrost okulantów liw na podk adce Pixy. Zesz. Nauk. ISiK 3, 49 54. Karychev K.G., Jankova A.I., 1999. Sliva i vajlochnaja vishnia. Sadovod. i Vinograd.1, 5 6. Ksi niak A., 2007. Endomikoryzy i ich zastosowanie w urz dzaniu ogrodów. Mat. Konf. Mikoryza w architekturze krajobrazu, Pozna, 11 12. Krupa P., 2007. Grzyby ektomikoryzowe i biostabilizacja zanieczyszcze na terenach trudnoodnawialnych. Mat. Konf. Mikoryza w architekturze krajobrazu, Pozna, 9 10. Kubiak J., 2005. Mikoryzacja ro lin i aplikacja szczepionek mikoryzowych. Probl. In. Rol. 13 (2), 25 32 Kubiak J., 2007. Zalesienia z mikoryz. Mat. Konf. Mikoryza w architekturze krajobrazu, Pozna, 19 22. Michev A.M., 1990. Vajlochnaja vishnia. Sadovod. i Vinograd. 8, 43 44. Seneta W., Dolatowski J., 1997. Dendrologia. PWN. Warszawa, 298. wierczy ski S., 2001. Ocena przydatno ci szkó karskiej Prunus besseyi Bailey jako podk adki dla brzoskwini oraz Prunus tomentosa Thunb. jako podk adki dla liwy. Maszynopis pracy doktorskiej. wierczynski S., Stachowiak A., 2007. Wp yw zabiegu mikoryzacji podk adek na wzrost okulantów jab oni ozdobnej Royalty. Mat. Konf. Mikoryza w architekturze krajobrazu, Pozna, 25. Acta Sci. Pol.

Influence of rootstocks and appling mycorrhizal on the growth of maiden trees... 11 Tretjak K.D., 1983. Slaboroslyj podvoj dlja slivy. Sadovodstvo 1, 23 24. Webster A. D., Hollands M. S., 1999. Apple rootstock studies: Comparision of Polish, Russian, USA and UK selections as rootstocks for the apple cultivar Cox s Orange Pippin (Malus domestica Borkh.). J. Hort. Sci. Biotech. 74(3), 367 374. WP YW PODK ADKI I ZASTOSOWANIA SZCZEPIONKI MIKORYZOWEJ NA WZROST OKULANTÓW I DRZEW ODMIANY WOODII W TRZECIM ROKU PO POSADZENIU Streszczenie. W do wiadczeniu przeprowadzonym w latach 2005 2007 porównano wp yw dwóch podk adek i zastosowanie szczepionki na wzrost okulantów i drzew odmiany Woodii w trzecim roku po posadzeniu. Wy szy procent okulantów otrzymano na podk adce Prunus tomentosa oraz przy zastosowaniu szczepionki. Podk adki nie zró nicowa y wzrostu okulantów w szkó ce. Zastosowanie szczepionki nie spowodowa o silniejszego wzrostu okulantów na obu podk adkach, a nawet zredukowa o istotnie sum d ugo ci p dów bocznych. Reakcja podk adek by a zró nicowana. Rozpatrywane podk adki wp yn y na wszystkie paramerty wzrostu drzew w trzecim roku po posadzeniu. Silniej ros y drzewa odmiany Woodii na podk adce Prunus cerasifera ni Prunus tomentosa. Drzewa na podk adce Prunus cerasifera s abiej jednak kwit y od tych na podk adce Prunus tomentosa. Zastosowanie szczepionki zwi kszy o grubo pnia i rozmiar koron drzew odmiany Woodii, a nie mia o wp ywu na ich kwitnienie i owocowanie. S owa kluczowe: podk adki, szczepionka, drzewa ozdobne odmiany Woodii, wzrost Accepted for print Zaakceptowano do druku: 17.10.2008 Hortorum Cultus 7(4) 2008