Abstract
Shoot regeneration from Rubus leaves was obtained on a medium containing MS salts, vitamins and sugars, Staba vitamins, casein hydrolysate (100 mg l−1) and 10 μM thidiazuron. Shoot regeneration from Malus leaves was obtained on N6 rice anther medium with 5 μM thidiazuron. In vitro pretreatment of source shoots with either colchicine or thidiazuron enhanced the organogenic potential of detached leaves of two Rubus hybrids. The response to colchicine was quadratic and occurred at non-mutagenic concentrations (75–250 μM). The response to thidiazuron was exponential between 0 and 5 μM. When applied as a pretreatment, the effectiveness of several different cytokinins (benzyladenine, thidiazuron, zeatin) at enhancing Malus and Rubus organogenesis was related to the shoot proliferation activity of the cytokinin and to treatment-induced variation in leaf and petiole size.
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Abbreviations
- BA:
-
benzyladenine
- 2,4-D:
-
2,4-dichlorophenoxyacetic acid
- IBA:
-
indolebutyric acid
- MS:
-
Murashige & Skoog basal medium devoid of plant growth regulators
- OI:
-
organogenesis-initiating subculture
- PTI:
-
colchicine pretreatment subculture
- PTII:
-
cytokinin pretreatment subculture
- NAA:
-
naphthaleneacetic acid
- TDZ:
-
thidiazuron
- zeatin:
-
trans-zeatin
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Swartz, H.J., Bors, R., Mohamed, F. et al. The effect of in vitro pretreatments on subsequent shoot organogenesis from excised Rubus and Malus leaves. Plant Cell Tiss Organ Cult 21, 179–184 (1990). https://doi.org/10.1007/BF00033439
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DOI: https://doi.org/10.1007/BF00033439