scholarly journals Plant growth regulators in seeds of Cucurbita pepo L. III. Structures of plant growth inhibitors in seeds of Cucurbita pepo L.

1977 ◽  
Vol 41 (1) ◽  
pp. 189-194 ◽  
Author(s):  
Hiroshi FUKUI ◽  
Koichi KOSHIMIZU ◽  
Yoshimitsu YAMAZAKI ◽  
Sadakazu USUDA
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Cucurbita Pepo ◽  
Growth Inhibitors ◽  
Plant Growth Inhibitors

Phenolic plant growth inhibitors from the flowers of Cucurbita pepo

1982 ◽  
Vol 21 (8) ◽  
pp. 1935-1937 ◽  
Author(s):  
Hideji Itokawa ◽  
Yoshiaki Oshida ◽  
Akira Ikuta ◽  
Hideo Inatomi ◽  
Takashi Adachi
Keyword(s):  
Plant Growth ◽  
Cucurbita Pepo ◽  
Growth Inhibitors ◽  
Plant Growth Inhibitors

scholarly journals Response of Hybrid Cymbidium (Orchidaceae) Protocorm-Like Bodies to 26 Plant Growth Regulators

2014 ◽  
Vol 20 (1) ◽  
pp. 3-13 ◽  
Author(s):  
Jaime A. Teixeira Da Silva
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Effective Means ◽  
Multiple Shoots ◽  
Growth Inhibitors ◽  
Light Conditions ◽  
Cell Layers ◽  
Organogenesis In Vitro

Abstract Teixeira da Silva J.A., 2014: Response of hybrid Cymbidium (Orchidaceae) protocorm-like bodies to 26 plant growth regulators [Cymbidium (Orchidaceae) hibrido į protokormą panašių kūnelių reakcija į 26 augalų augimo reguliatorius]. - Bot. Lith., 20(1): 3-13. Plant growth regulators (PGRs) are one of the most effective means of controlling plant organogenesis in vitro. Hybrid orchid production relies on effective protocols to maximize clonal shoot output. This is best achieved when protocormlike bodies (PLBs) are propagated. In a bid to deepen orchidologists’ understanding of basic responses of Cymbidium to PGRs, this study aimed to establish the organogenic response of hybrid Cymbidium Twilight Moon ‘Day Light’ half-PLBs or PLB thin cell layers (TCLs) to a single application of PGRs (6 auxins; 7 cytokinins; 3 alternative PGRs), 3 herbicides or 7 growth inhibitors/retardants at 4 concentrations (1, 2, 4 or 8 mg·1-1) as well as a control (0 mg·1-1), both in the light and in the dark. The control (PGR-containing TC medium) performed best, but all auxins and growth inhibitors and retardants were toxic to neo-PLB formation, resulting in 100% death. A synthetic auxin (BSAA), a cytokinin (4-CPPU) and two herbicides (dicamba and picloram) were equally toxic. No auxins, TIBA, GA3 or SA induced any organogenic response. 1 or 2 mg·1-1 2,4-D or 1 mg·1-1 TDZ induced embryogenic callus, but 2-8 mg·1-1 2,4-D resulted in abnormal shoots. TDZ induced direct multiple shoots. Only five remaining cytokinins (Ads, BA, Kin, ZR, 2iP) could form neo-PLBs, but always significantly less than the controls, independent of the explant used (half- PLBs or tTCLs) and light conditions (light vs darkness). These five cytokinins could be useful for neo-PLB induction of other Cymbidium hybrids. A new concept, the average cumulative value or ACV, is introduced

scholarly journals Plant growth regulators in poplar clones differing in resistance to the fungus Ceratocystis fimbriata Ell. et Haist

2014 ◽  
Vol 63 (1) ◽  
pp. 53-59 ◽  
Author(s):  
Jadwiga Stopińska
Keyword(s):  
Plant Growth ◽  
Water Content ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Growth Inhibitors ◽  
Lower Intensity ◽  
Ceratocystis Fimbriata ◽  
Poplar Clones ◽  
Susceptible Clone ◽  
Intensive Growth

In poplar clones with different resistance to the fungus <i>Ceratocystis fimbriata</i> growth of shoots, intensity of transpiration and the level of endogenous growth regulators were determined. More resistant clones, <i>Populus</i> 'Robusta' and P. 'PK-136-2' (<i>P. nigra</i> 'Italica': x <i>P. laurifolia</i>) had more intensive growth of shoots, higher water content in leaves and a lower intensity of transpiration than the more susceptible clone, - <i>P. 'NE-42'</i> (<i>P. maximowiczi</i> x <i>P. trichocarpa</i>). The leaves of the more resistant clones contained more auxins (IAA) and cytokinins, especially zeatin, and less growth inhibitors (ABA) than those of the susceptible one. The level of plant growth regulators and/or the relations betweeen them may be responsible for the different poplar resistance to <i>C. fimbriata</i>.

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