Stock mother plants have gained importance in the process of adventitious rooting of woody plants in recent years. The present study reveals the role of the cutting position from a stock mother plant ...for subsequent rooting. Cuttings of
Prunus subhirtella
Miq. var. Autumnalis which originated from suckers at the bottom of a tree developed a rooting system of better quality (rooted cutting without callus formation, more main roots) compared to cuttings which originated from shoots at the top of a tree. The latter accumulated significantly more indole-3-acetic acid (IAA) with the highest value of 25.37 μg g
−1
FW on the severance date. These cuttings also contained more indole-3-acetyl-aspartate (IAA-Asp) on the second day after severance with the highest value of 4875.95 μg g
−1
FW compared to cuttings from the bottom-deriving suckers. The latter metabolised IAA primarily via 2-oxindole-3-acetic acid (oxIAA) and indole-3-methanol because the concentrations of these compounds increased at the base of these cuttings. The highest concentration of oxIAA, 8.3 mg ekv. IAA g
−1
FW, was measured 1 h after severance in cuttings from the bottom-derived suckers. With 590.5 ng ekv IAAg
−1
FW, the indole-3-methanol values were also significantly higher in the cuttings from the bottom shoots compared with cuttings from the top of the tree.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Stockplants with various physiological characteristics were compared in a propagation experiment with leafy cuttings of ornamental cherry
Prunus subhirtella
‘
Autumnalis
’. At the time of severance, ...cuttings harvested from juvenile 3-year-old in vitro-derived plants contained in their bases nearly twice as much IAA (indole-3-acetic acid) as cuttings derived from mature 40-year-old trees. Juvenile cuttings showed better rooting success in the propagation season. They developed a significantly higher number of primary roots and grew better than physiologically older cuttings. IAA time-course levels in cutting bases in the days after severance were similar in both cuttings types. They decreased over the first day (rooting late initiation phase) after severance until the third day after severance when the levels increased again (rooting induction phase and beginning of the root developing phase). At the time of severance, juvenile cuttings also contained higher concentrations of IAAasp (indole-3-acetyl aspartic acid) in their bases than mature cuttings. IAAasp time-course levels were similar to those measured for IAA.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
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