Study on Compatibility of Three Native Prunus Species Grafted on Prunus campanulata Maxim. Stock

• Main Authors: Wu, Chih-Yi, 吳致儀
• Other Authors: Shu-Tzong Lin Ph. D.
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/44269104528069176523

碩士 === 國立宜蘭大學 === 森林暨自然資源學系碩士班 === 99 === For the conservation of ornamental Taiwan Native Prunus Species and establishment of the germplasm bank, To explore graft compatibility of Prunus matuurai, Prunus transarisanensis and Prunus taiwaniana on Prunus campanulata rootstock that distributed widely in Taiwan. The compatibility assessment by the survival, growth, morphological traits and activity of photosynthesis. Scions of the 3 native prunus species that collected from natureal tree on the middle elevation mountain area in December, 2008 and grafted with 2 yearth cultivated Prunus campanulata seedlings as rootstock. The initial survival rate of P. matuurai grafted seedlings was 42%, and 69%, 64% for P. transarisanensis , P. taiwaniana .After two years, the survival rates were down to 31%, 45%, and 15% respectively. That indicated incompatibility of Prunus taiwaniana grafted on P. campanulata Maxim. more than the other 2 species. By the external morphological traits to assess graft compatibility of these grafted seedlings, there have significant negative correlation between grafted level and mortality of P. matuurai grafted seedlings only, that means we could interpret graft incompatibility by external morphological performance. For comparising the physiological activity of these grafted seedlings, the grafted quality grade of 3 cherry species on Prunus campanulata Maxim. rootstock were further divided into excellent, middle, inferior three class by morphological traits. Results showed there were not significantly different in dark respiration rate, quantum yield (Qy ), light compensation point among the 3 graft grade of 3 prunus species’ seedling respectively. The lower grade grafted seedlings could raise stomata conductance and water use efficiency to maintain photosynthetic capacity. We also found there are no photoinhibition, only the non-photochemical quenching of P. transarisanensis grafted seedlings decreased as graft grade descended. The maximum value of maximum PSII quantum yield rate (Fv/Fm) of the three species seed seedlings higher than grafted seedlings, but there was not significant difference in P. matuurai seed and grafted seedlings. The Fv/Fm of P. transarisanensis and P. taiwaniana was declined with grafts level descended, but still in normal level. The Fv/Fm of inferior levelof P. taiwaniana grafted seedlings was significant lower than others maybe due to graft incompatibility to limit nutrient and water carrying.